Y.A.T.I. Episode
When Number One is asking for more power on the laser cannon she talks into the communicator, but when she wants to shut it down she just shouts at the sky. TOS : The Cage
Kirk's tombstone has "James R. Kirk" on it, even though his middle initial is later well established as T. TOS : Where No Man Has Gone Before
Sulu's countdown clock doesn't count the time off correctly. TOS : The Corbomite Maneuver
An editing error in this episode shows McCoy in sick bay at the same time that he's meant to be in the transporter room. TOS : Mudd's Women
As alluded to in the review, the most commonly asked question regarding this episode is "why didn't the Enterprise just send a shuttle down?" The ship was presumably not carrying those handy little craft on this mission for some reason... TOS : The Enemy Within
When Prof. Crater gets stunned on the planet the scene is run in fast forward, for some unknown reason. It looks awful. TOS : The Man Trap
When the water infects Tormolen it runs up hill to get to his hand. TOS : The Naked Time
Just after Charlie's card tricks he meets Kirk in the corridor. They both enter a turbolift to go to the bridge. On entering, Kirk is wearing his standard yellow command shirt, but when he gets out of the lift he's changed to his green v-neck one. Maybe Charlie used his special powers to change Kirk's clothing? TOS : Charlie X
The Romulan ship is using 'simple impulse power only' and yet crossed vast distances during the episode. TOS : Balance of Terror
Isn't it a bit odd that Kirk is able to strangle Korby? Korby, remember, the man who turns out to be an android?

Look at the weapon Andrea uses to kill the Android Kirk. It's the exact same weapon which was used in the original pilot episode "The Menagerie". There it was called a laser, but here it looks, sounds and behaves like a phaser.
TOS : What Are Little Girls Made Of?
Security at the penal colony seems extremely lax. The 'cells' have ventilation ducts that you can crawl through, and they don't appear to check their cargo containers for escaping prisoners. TOS : Dagger of the Mind
When the command crew's communicators are stolen the security guards are out on patrol. Why couldn't they use their communicators when they returned? TOS : Miri
When McCoy offers Spock a drink he refuses, saying his ancestors where spared it's effects. McCoy claims that this is probably why they where conquered. However, we hear in "The Immunity Syndrome" that the Vulcans have never been conquered. TOS : The Conscience of the King
When Kirk hears that there are five survivors on the shuttle, he smiles and gets on with his job. Although attention to his work is fairly laudable, it could be his two best friends that are dead! You would think he would take a little time to find out. TOS : The Galileo Seven
Kirk claims at one point that the audio sensor can be boosted to one to the fourth power. However, one to any power is still one! TOS : Court Martial
Surely they could have come up with a more sophisticated method of communication for Pike in the 23th century than just flashing a light.

Also, the transporter seems to be making phaser noises, and then Spock has an emotional outburst when only the women are transported.
TOS : The Menagerie, Part 1
Surely they could have come up with a more sophisticated method of communication for Pike in the 23th century than just flashing a light.

Also, the transporter seems to be making phaser noises, and then Spock has an emotional outburst when only the women are transported.
TOS : The Menagerie, Part 2
Yet again, nobody thinks to power up a shuttle and go rescue the boss. TOS : Shore Leave
It's established at the start of the episode that they are 900 light years from earth, thus Trelane's information should be this much out of date. However, he talks of Napoleon who lived only 467 years ago. TOS : The Squire of Gothos
When the Metrons return Kirk to the ship are we really to believe that they wash his face, clean his clothes and heal his leg? TOS : Arena
The Commodore claims that the energy distortions where felt throughout every quadrant of the galaxy and far beyond. How does he know, they'd only explored a small fraction of the Alpha quadrant by this time! TOS : The Alternative Factor
When they beam the pilot from the cockpit of the plane he appears on the transporter pad stood upright. TOS : Tomorrow is Yesterday
Landru claims his society is without conflict, yet when the festival begins there's plenty of conflict to go round. TOS : The Return of the Archons
The people on the planet attack the ship with sonic weapons... how do these manage to work through the vacuum of space? TOS : A Taste of Armageddon
When Khan shuts down life support on the bridge Kirk orders commendations for five of those present. There are, however, seven people on the bridge. Don't the other two deserve a commendation as well? TOS : Space Seed
When Kirk packs to leave the ships he uses a vintage 1960's suitcase. TOS : This Side of Paradise
Kirk apparently can't tell his left from his right. He points right and tells Spock to go left, then he points left and say's he'll go right. Apparently, Spock can't tell either because he heads off in the direction Kirk pointed in rather than the way he was told to go. TOS : The Devil in the Dark
One of Kor's rules is that no groups of more than three Organians are allowed to meet. However, throughout most of the episode the five member ruling council stays together, including during their meetings with Kor. TOS : Errand of Mercy
Why does Spock have to build a computer to access the data held on the tricorder? Surely he can just use the built in monitor and controls like he does in all the other episodes! TOS : The City on the Edge of Forever
When Kirk orders the satellite energized, Sulu is sitting at his usual position at the helm. When the scene cuts to a wider shot he has vanished and been replaced by a guy in a red shirt.

When the Denevans first attack the landing party, Kirk, Spock, McCoy and one of the two redshirts all fire on them - whilst Yeoman Zahra and the second redshirt stands in the background doing nothing. The redshirt seems to hold his fire because the other officers are blocking his line of sight, so he just holds his phaser at the ready instead. Zahra just stands there... but then she has no choice - because closeups of her walking around show that she's not armed! Now it's not technically her job to be shooting people - Kirk makes clear in the transporter room that she's along to make a full record of everything they see and do on the surface. But even McCoy carries and uses a phaser. Surely Zahra should have at least been carrying one so she could defend herself if she got separated from the rest of the party. So why wasn't she armed? Could it have possibly been because she was (gasp!) a woman?
TOS : Operation: Annihilate!
When Sylvia and Korob are seen in their true form at the end of the episode you can quite clearly see the strings. TOS : Catspaw
Kirk says he will not reveal Cochrane's existence. So what's he going to do about Hedford? She's an important woman, and she's vanished without trace. Even if McCoy fakes up a death certificate, wouldn't the absence of a body be somewhat hard to explain? TOS : Metamorphosis
One of the shots of the Enterprise in space is a mirror image, with the ship's registry number shown backwards. TOS : Friday's Child
Apollo generates an energy field in the shape of a giant hand to hold the Enterprise in position. The crew manage to punch a hole in the field to fire through, yet when we see the ship fire, the hand has vanished completely. TOS : Who Mourns for Adonais?
T'Pau is a very influential and important person in the Federation. How do you suppose she will react when she discovers, a few weeks or months after this episode, that Kirk is in fact alive and well and that she was subjected to a con trick? TOS : Amok Time
Is neutronium transparent? Stars are clearly visible through the Doomsday machine's neutronium hull on several occasions. TOS : The Doomsday Machine
Now I must admit that I've never walked a pretty girl home through dense fog... but if I did, I suspect I could find something better to do than wander off out of sight to "lead the way", as Scotty does in this episode. TOS : Wolf in the Fold
Spock declares that Nomad's energy bolts are the equivalent of 90 of their own photon torpedoes. The ship takes three hits from these. Does it really take 270 photon torpedoes to break down the shields of a Starship? Strangely enough, when one of the ship's photons hits Nomad a minute later and causes no damage, Kirk is amazed that anything can survive such a blast. If his own ship can accept hundreds of times this punishment why is it such a big deal that Nomad can take one hit? TOS : The Changeling
Landon says at one point that the planet would be a paradise without Vaal. I don't know about you, but my vision of paradise does not include exploding rocks and highly poisonous plants. TOS : The Apple
When Sulu tries to kill Kirk, Marlena uses the Tantalus device to kill Sulu's henchmen. Why doesn't she kill Sulu as well? TOS : Mirror, Mirror
Why the hell does Stocker send the ship straight into the Neutral Zone? Okay he's no Kirk, but I find it hard to believe that he is so incompetent that he doesn't know or care about the rules regarding trespass into the zone. TOS : The Deadly Years
If Norman is the head android and none of the others can function without him, how did they function when he was light years away taking over the Enterprise? TOS : I, Mudd
When Kirk agrees to allow Klingons onto the station, he says he will send a security guard over for every one of the Klingons. I presume that these guards were actually supposed to follow the Klingons, rather than just wander the station corridors. Yet there are very few redshirts present during the bar fight. Did the security guards sneak off somewhere? TOS : The Trouble With Tribbles
When Kirk breaks Spock and McCoy out of prison, he fires a burst at the lock from his machine gun. Amazingly, this does absolutely no damage to the door. It's almost like Kirk was firing blanks or something! Strangely, the door opens anyway. TOS : Bread and Circuses
For a violent race, the Andorians sure don't wear sensible clothes. Keep an eye on the Andorian during his fight with Kirk - he's fighting his own clothes almost as much as the captain! TOS : Journey to Babel
When McCoy heats up some rocks in the cave, we get a really nice close up of him firing the phaser. Or rather, we get a really nice close up of him keeping his hand perfectly still as the phaser fires itself. TOS : A Private Little War
Kirk is told that in his last fight, he must stay in a yellow zone and his opponents in the blue. Trespass into an opponents zone will cost you a weapon. Despite this, both sides routinely trespass throughout the fight without any penalty being imposed. TOS : The Gamesters of Triskelion
Spock claims that the detonation of an ounce of antimatter will rip half a planet's atmosphere off. In fact, this much antimatter would 'only' yield a maximum of about one megaton, enough to destroy a single city. TOS : Obsession
Why do they set the antimatter charge to detonate after seven minutes? This is just barely enough time for them to escape, yet there is never any reason given why they couldn't make it ten minutes, or ten hours for that matter. TOS : The Immunity Syndrome
Kirk's attempts to use the car are hilarious indeed... but I find it hard to believe that the owner left the keys in it and I find it harder to believe that Kirk didn't simply have the Enterprise beam him to his destination. TOS : A Piece of the Action
Why does Kirk get so worked up when Scotty and Spock suggest destroying the ship? He threatens the very same thing himself when Bele seizes control in a few months time, and all he wanted to do was go to a planet in our own galaxy. And of course, he will ultimately carry out the destruction of the ship rather than let the Klingons seize it in Star Trek III. TOS : By Any Other Name
Supposedly, the aliens transfer their host's personality into the spherical containers when they take control of the body. Yet at the end Sargon and Thalassa occupy Kirk and Mulhall for a last moment, after all the containers have been destroyed. So where do the host's minds go? TOS : Return to Tomorrow
Kirk and co. find it incredible that a group of Nazis exist on an alien planet. Yet they found it perfectly reasonable that a Roman society could develop in "Bread and Circuses", only nine episodes ago. They claim it is a perfect example of "Hodgkin's law of parallel planetary development". So why are the Nazis any different? TOS : Patterns of Force
The Woden freighter seen in this episode is a re-use of Khan's DY-100 ship. That was supposed to have been built in the mid 1990s, are these ships still in service 270 years later? TOS : The Ultimate Computer
Kirk is amazed that Tracey would dare interfere in another culture in this episode. He says that a Starship captain would give his life, sacrifice his ship and its entire crew rather than do such a heinous thing. There follows a list of episodes in which Kirk has interfered with other cultures: "The Apple", "Miri", "The Return of the Archons", "A Taste of Armageddon", "This Side of Paradise", "Errand of Mercy", "Mirror, Mirror" and "Friday's Child". This is not a complete list, but I trust the point has been made. TOS : The Omega Glory
Kirk agonises over whether to let Seven use the computer to destroy the missile, not knowing if he can trust the mysterious agent. Why doesn't he just have the Enterprise blow the missile up instead? TOS : Assignment: Earth
When Earp confronts Kirk, Spock tells him to sit down and not move a muscle - especially his hands. Strangely, Kirk immediately flexes his hands! TOS : Spectre of the Gun
When the Klingon ship makes an attack, it is reported to be travelling at warp speed. Shortly afterwards, Sulu calls off the range to the ship in kilometres, but the rate at which the range numbers change is way too slow for a ship doing faster than light speeds. It's possible that the Klingon ship slowed to impulse, but it's odd that nobody commented on this if it happened.

Speaking of the Klingon attack, several shots of the bridge show somebody else sitting in Chekov's chair.
TOS : Elaan of Troyius
When the ship loses main power while trying to destroy the asteroid, they can't use phasers any more. Yet nobody mentions the possibility of using photon torpedoes. TOS : The Paradise Syndrome
When the Romulans first surround our heroes, one of their officers declares that "you have been identified as the Starship Enterprise". Good call, dude - it says "USS Enterprise" in twenty foot high letters right across the ship's hull! TOS : The Enterprise Incident
At one point, Spock and Kirk take a trip in a turbolift. Strangely, neither one ever specifies a destination. TOS : And the Children Shall Lead
When Kirk and his officers are captured by the women, they are rendered unconcious and sat on stools. Amazingly, they all manage to keep sitting on these stools the entire time they are unconcious. TOS : Spock's Brain
After Kirk talks to Kollos about the mind meld with Spock, there's a shot where his hair is parted on the wrong side. The makers chose to mirror-image the film for some strange reason.

During Marvick's fight in Engineering, a crewman slams into the gray housing in the middle of the deck. If you watch closely, you can see that the whole thing shifts slightly when he hits it.
TOS : Is There in Truth no Beauty?
When the Vians torture Kirk they remove his uniform top, only to put it back on him when they send him back. Obviously they didn't want to get it all bloody or anything. Considerate torturers, these Vians. TOS : The Empath
At the end of Kirk's memorial service, Spock calls the crew to attention. Everybody stands, but their arms are all over the place - some behind their backs, some in front, some at the sides. I know Starfleet don't go in for all this military drill stuff in a big way, but really I would have thought they would make a better showing for this occasion. TOS : The Tholian Web
The Fabrini language is rather peculiar - it consists of only two symbols, a triangle and an upside down triangle! TOS : For the World is Hollow and I Have Touched the Sky
Scotty really must be much stronger than he looks. At one point in this episode, he knocks a Klingon unconcious by hitting him on the elbow! TOS : Day of the Dove
The Platonians say they left Earth when the Greek civilization went into decline. Yet they know French phrases and Mexican dances, both invented much later in Earth's history. TOS : Plato's Stepchildren
When Kirk fires at Deela, she steps out of the way of his phaser beam. Even assuming that this acceleration thing can make her move at a significant fraction of lightspeed, she would be going millions of times normal. But that would mean that for every minute which passed for the normal speed folk, a couple of years would pass for her. Since Spock had time to analyse the Scalosian water and come up with a counter-agent, Kirk would be an old man or dead by the time he got to him. TOS : Wink of an Eye
Before Losira kills the Engineer on the Enterprise, she describes one or two of the ship's functions to him. He calls out to Scotty that a strange woman knows every detail of the ship's systems. I know he was caught by surprise here, but this seems like a rather sweeping exaggeration. TOS : That Which Survives
Kirk makes a log entry on Stardate 5730.7, then dates his next log as 5730.6. Is he going backwards in time? TOS : Let that be Your Last Battlefield
Surely there are any number of things Spock could have done when faced with the two Kirks. For instance, he could have stunned both of them and then had a hundred security personnel beam down from the ship to deal with the problem while he sorted Garth and Kirk out at his leisure.

Garth has an explosive so powerful that one flask of it can vaporize an entire planet? Hardly seems likely, that's far more powerful than even an antimatter reaction. Still, the drop used on Marta doesn't do much and Garth is,/i. insane after all, so maybe he's just delusional.
TOS : Whom Gods Destroy
When Kirk tries to contact the crew on the empty Enterprise, we get several shots of empty corridors and rooms. Strangely, sickbay seems to be on red alert. TOS : The Mark of Gideon
Do the Federation buy Romulan hardware? The control room on Memory Alpha has a Romulan control box on the desk. TOS : The Lights of Zetar
Just after the opening credits, Kirk says a line without moving his lips. TOS : The Cloud Minders
When Sevrin uses the ultrasound on the Enterprise crew, the exact same people in the exact same clothes fall in the exact same places as they did in "Spock's Brain". Coincidence, or what? TOS : The Way to Eden
Flint tells McCoy he can supervise the M-4's work, yet the robot locks McCoy out of the laboratory a few seconds later.

Flint claims that rats died of the bubonic plague. In fact rats are immune to the effects of the plage, which is how they were able to live long enough to carry it around everywhere on infected fleas.

The signs over the Androids read "Rayna", but the end credits list the character as "Reena."
TOS : Requiem for Methuselah
Lincoln is mightily impressed by the technology of the Enterprise, commenting on the likes of the transporter to Kirk. Yet he walks through the automatic doors as if he's been using them all his life. TOS : The Savage Curtain
Spock tells Zarabeth that he comes from a world "millions of light years away". Our galaxy is no more than a hundred thousand light years from end to end, and Spock has previously demonstrated amazement at the thought of intergalactic travel in anything less than millennia. He can't be millions of light years from home. TOS : All Our Yesterdays
Astoundingly, Lieutenant Galloway returns to life for this episode after being vapourised by Captain Tracey in "The Omega Glory"! TOS : Turnabout Intruder
When Picard fires an energy beam at Farpoint to feed the creature, he orders Yar to use the main phasers. However, the beam comes from the middle of the Captain's Yacht. TNG : Encounter at Farpoint
Why is everybody so impressed with Wesley's saving the ship from the stellar fragment? They wouldn't have been in any danger in the first place if it wasn't for him taking over engineering! And although the Enterprise escaped, the Tsilkovsky was destroyed - by Wesley, without any orders to do so. If I was Starfleet I'd be pretty miffed at the kid. TNG : The Naked Now
I find it very hard to believe that Yar would actually assault one of the Ligonians for trying to give Picard a gift befoire she checked it. As it turned out Lutan was impressed by Yar's action, but this could have caused a major diplomatic incident!

Not strictly a YATI, but when Yareena is beamed up to the Enterprise Dr. Crusher is wearing a wrist watch.
TNG : Code of Honor
When Data mentions the "red white and blue" of the US flag, Yar asks what primary colours have to do with it. Unfortunately, white is not a primary colour. TNG : The Last Outpost
I find it interesting to contrast Picard's actions in this episode with "Q Who?". Here, the Enterprise is stranded far from home. Picard is assured that they can return easily, yet he makes no effort to explore the area before setting off. In "Q Who?" the Enterprise is flung far from home, has no clear way of returning, and Picard's most trusted friend tells him to return at once. Instead he goes off to investigate a nearby star system. Why the change? Did Picard come to be more blase about being thrown about the universe after the first few times or something? TNG : Where No One Has Gone Before
How is it that Picard is able to simply order Riker and Crusher to leave him alone when they question his command abilities? We have ample evidence that either one of these officers can relieve the captain if they feel his command judgement is impaired, and Crusher at least has the right to demand both that the captain explain his actions to her and that he submit himself for a medical exam. Yet they both back down when challenged. TNG : Lonely Among Us
Yar tells Picard at the start of the episode that she has fully reviewed the local laws. Yet Wesley didn't seem to know he wasn't allowed to go into the flowerbed, and nobody knew what the punishments for breaking a law were. TNG : Justice
Picard claims Data is the ship's second in Command in this episode. In fact, Riker is second in command - Data is third. TNG : The Battle
When Riker makes Wesley a few years older, Geordi whistles and comments "hey Wes, not bad!". When Riker gives Geordi his eyes back he looks at Yar and comments that she is even more beautiful than he imagined. So, can Geordi tell what people look like via his VISOR, or can't he? If he can, he knows what Yar looks like. If he can't, he doesn't know what Wesely looks like.

And now that Wil Wheaton is indeed ten years older, why doesn't he look anything like the guy in this episode? I know, there was nothing they could have done about this one. But it's still a valid nit!
TNG : Hide and Q
I find it strange that Wyatt has been dreaming about this woman for many years. There is no indication that he is telepathic, and even if he is then surely the ship would have been well out of range? TNG : Haven
We are assured that even the slightest slip in the welcome given to the Jarada will bring disaster. Yet Picard keeps them waiting for a good hour or two, and Riker tries to talk to them to explain the problem, and all they do is make a nasty noise. So I guess they aren't that big on ritual after all.

This is the first "holodeck gone bad" episode in Trek, and as it's one of the more egregious examples it's a sensible place to address the issue. Let's take a look at what happens here : the ship is scanned. Not shot at, not damaged, just scanned. Something that must happen to it on a very regular basis. As a result, the holodeck doors are sealed. All communication in or out is cut off. The safety systems are compromised to the extent that the characters are able to shoot people and mortally wound them. And the design of the system is such that it's next to impossible to shut it down, and an imprecise attempt to do so can kill everybody inside.

Can you imagine something like this being put into use today? Whoever had a hand in designing, building and installing the thing would find themselves sued into oblivion, and quite possibly jailed on a charge of negligent homicide!
TNG : The Big Goodbye
Picard sends Wesley to check on Data and Lore. So when Wesley later reports back that there's something wrong, why doesn't Picard want to listen to him? Did he just give him the job to get him out from underfoot or something?

Riker gives the Stardate as 4124.5, dropping a digit before the decimal point.
TNG : Datalore
This episode claims that the Prime Directive applies only to Starfleet personnel. So the Federation doesn't mind at all if its citizens go out and interfere with other cultures, so long as its official representitives don't do so. Does this really sound right to anybody? What's to stop somebody like Vash from going and conquering some primitive planet with advanced technology so she could strip the place, like the Ferengi did in Voyager's "False Profits"?

Also, how come Beverly won't let the Odin survivors be beamed up? Sure, they might die on board the ship because of the disease. But as far as anybody knew, they would definitely die on the planet! What would you rather do, take your chances with the virus or get disintergrated?
TNG : Angel One
When the antimatter pods started to lose containment, the crew spent some time evacuating the ship. Why bother, when they could just separate the saucer section? This would have got most of the civilian population away from the danger in under a minute, and saved half the ship's structure when it eventually destroyed itself. TNG : 11001001
When Yar and Worf cut through the steel door, you can see the outline of the stuff that is actually burning the hole.

At one point Admiral Jameson confesses that he has committed a major violation of the Prime Directive. He then confesses that he falsified his reports to Starfleet. Surely Picard is obligated to place him under arrest for these crimes, yet not only does he not throw Jameson in the brig, he lets him continue in command of the mission!
TNG : Too Short a Season
Just how many children are there on board the Enterprise-D? After all, the Aldeans are trying to repopulate their entire species here - yet they only kidnap seven children! Logically, they should have taken all the kids on the ship. After all, they won't get another chance - if their actions had succeeded, surely the Federation would avoid the area and warn other species to do the same. And if seven is all that was available, surely it would be better to wait until a better candidate vessel came along?

Also, the damage being done to the Aldeans is supposed to be due to the destruction of their ozone layer, which is letting in harmful light from the sun. But we're specifically told that their cloaking device bends the light around the planet, so there should be nothing hitting the planet to harm them! And if the cloak doesn't bend non-visible light around the planet, then it would be easily detectable.
TNG : When the Bough Breaks
The law of the conservation of energy is one of the most basic principles of physics. This principle would indicate that the amount of energy the microbrain has available cannot be more than it can draw from the lights in sickbay. Yet the thing is breaking through forcefields and threatening the entire ship! Can it really do this on the power it is drawing from a few lightbulbs? Or has the conservation of energy been overcome in the 24th century? (Actually this would explain more than a few things about Trek, but it's hard to believe.) TNG : Home Soil
In this episode, Jake steals a shuttle. Flitting lightly over the fact that once again the crew are unable to prevent this from happening, Jake is supposed to be an expert shuttle pilot. So why does he immediately plunge the shuttle into extreme danger? TNG : Coming of Age
Worf claims that Klingons do not take hostages. Tell that to Kor, the revered Klingon dahar master who took hundreds of Organians hostage and had them all shot in "Errand of Mercy".

On the freighter, why does Data ask Geordi and Riker for help? They have to expose themselves to the damaged warp core to get to the problem, and once they do get there Data is the one who does all the work while they just stand around.

TNG : Heart of Glory
When Worf tries to target the cloaked vessel in orbit, it fires on the ship from almost directly behind. In reply, he fires directly ahead. TNG : The Arsenal of Freedom
As Picard leaves the cargo bay for his talk with Beverly, Yar gives him a big wave. Why? (Actually, it's because this is the last episode Denise Crosby filmed, but there's no on-camera reason for it.) TNG : Symbiosis
Worf says they are going to do a parallel transport of Picard and Troi. What exacty does he mean by this? Picard beams up several seconds after Troi, so it can't be the same as a simultaneous transport. TNG : Skin of Evil
Picard states that it rained all day on the day he was due to meet Jenice. Yet when he orders the computer to recreate that specific day on the holodeck, it's not raining. Wouldn't the computer have weather reports for the day?

Despite many claims about not being able to use contractions, Data famously reveals that he is the correct version of himself in the time loop sequence by claiming "It's me!"

TNG : We'll Always Have Paris
These alien parasites make you immune to phasers by flooding your body with adrenaline. How does adrenaline stop you getting a hole drilled in your chest?

I have to say, it's so common in science fiction that it's practically a cliche, but why the hell does killing the queen alien kill all the others? Even assuming some sort of telepathic link between them that made such a thing even possible, can you imagine such a bizzare weakness evolving in a species in the first place? Admittedly given the non-canon explanation for the creature's origins this becomes a bit more plausible, but taking the episode at face value it is a serious weak spot, an obvious way to try and wrap up the whole conspiracy in a line or two of dialogue.

TNG : Conspiracy
When Picard orders security to get Offenhouse off the bridge, they start to escort him out, then stop when the Warbird appears and spend the next few minutes gawking at it while their prisoner further disrupts the proceedings. This seems like a serious lack of professionalism to me. TNG : The Neutral Zone
Pulaski claims that the child's DNA is exactly the same as Troi's... so why is the child a boy when Troi is a woman? Surely the child should have grown up to look like Troi's identical twin sister.

When Troi is about to give birth, Pulaski offers her a painkiller and then claims that it will in no way diminish the experience of childbirth. Isn't this rather a sweeping and subjective viewpoint? Some women consider enduring the pain a significant part of the experience, what right does Pulaski have to simply dismiss this viewpoint out of hand?

TNG : The Child
Data claims there is no record of a ship finding an area of darkness like this one. Yet Kirk and the original Enterprise found something similar in "The immunity Syndrome". Since Data is supposed to be a repository of virtually all Federation knowledge, shouldn't he know this?

Riker gives the Yamato's registry number as NCC-1305-E, which is incorrect according to the ship's later appearence in TNG. Apparently Mike Okuda never corrected the line in the script because the scene was deleted - but the scene was then reinserted without his knowledge, and he didn't know about it until he saw the finished episode on television.

When Picard and Riker order autodestruct, the computer asks them what time interval they would like. Yet the first time this was used in "11001001", Picard commented that they had no choice about the time, it was a fixed 5 minute countdown.

TNG : Where Silence Has Lease
Data claims that Holmes could only defeat Moriarti at the cost of his own life. Well I've read every Holmes story and novel written and this isn't true. I assume Data was referring to Holmes' apparent death on the Reidenbach falls, but in fact Holmes survived this and went on to live to a ripe old age.

This episode is one in a long running series that claim that holodeck matter cannot leave the grid. Yet Data walks off the holodeck holding a piece of paper that Moriarti gives him! And to recap, in "Angel One" Picard was hit by snow flying out of the holodeck, which them made a mess on the floor, and in "The Big Goodbye" Picard is kissed by a holographic woman, and walks out of the grid with her lipstick still on his face.

TNG : Elementary, Dear Data
When the comic mentions a briefcase shaped like a fish, Data refers to it as an 'amphibian' briefcase. Fish are not amphibians. TNG : The Outrageous Okona
So this Riva guy is one of the most famous negotiators in history... and the Enterprise-D crew don't know he's deaf, or have any idea how to talk to him via the chorus? Even assuming that nobody knew about him as a matter of course, doesn't it seem strange that they didn't take a moment to find out a single thing about this very important person before meeting him? TNG : Loud as a Whisper
The whole concept of the long range, near warp transport is an odd one. Is the situation on the Constantinople really that desperate that the Enterprise can't afford to drop out of warp within normal transporter range and do a proper transport? Bear in mind that the former would add mere milliseconds to their journey, the latter five or ten seconds at most. Yet in order to save this few seconds, they risked beaming the away team into a wall! TNG : The Schizoid Man
When Pulaski is infected, Picard declared that saving her is now the ship's top priority. Huh? There are many people on the planet below, all infected. Shouldn't these take priority over a single person? TNG : Unnatural Selection
Kargan tells his officers to speak in Riker's language when he arrives on the ship. Doesn't Riker's universal translator let him understand and speak in Klingon? TNG : A Matter of Honor
Just how old is Maddox? He says he assesed Data on his entry into Starfleet, but other episodes establish that this was some 25 years ago. That would put Maddox well into his late forties at the least, and probably well into his fifties. He sure doesn't look that old to me. TNG : The Measure of a Man
Security puts in an unbelievably good showing in this episode. When Anya transforms into a monster in sickbay, Pulaski calls for help. A security team, accompanied by no less than the captain of the ship, arrives some three seconds later! That's quite some respose time they have there! TNG : The Dauphin
The Yamato's entire complement was killed in the warp core breach - why didn't Varley separate its saucer section before going into the Neutral Zone so he could leave the civilians behind? Isn't this kind of thing exactly what the separation capability is for? TNG : Contagion
LaForge claims that the surface of the planet is at a temperature of -291 celsius. At -273 celsius, the motion of the atoms and molecules in a substance stops. You can't go lower than this, because you can't make a particle go any slower than a dead stop. So unless they have for some reason redefined the celsius scale in the TNG era, LaForge messed up and nobody - including the ever pedantic Data - noticed it. TNG : The Royale
I suspect Riker isn't as good at this cooking thing as he claims. He says he is making omlettes at the beginning of the episode. Strangely, what he actually produces looks remarkably like scrambled eggs.

At one point Picard walks out of the shuttlebay and into a turbolift. The label on the door clearly says the lift is on Deck 6. However, the small shuttlebays are well below this on deck 12/13.

TNG : Time Squared
The E-D's engines are generating some odd sensor readings in this episode. Data suggests that rather than find and correct any problem, they should just reprogram the sensors to fix the readouts! What kind of practice is this - they just want to ignore it and hope it will go away! TNG : The Icarus Factor
I don't know if it could be called a YATI as such, but I find the behaviour of the senior staff in this episode horrendous. Considering how much they are always going on about how right and necessary the prime directive is, their blatant violation of it in this episode is hard to understand. Not only that, but there are several occasions on which officers violate Picard's orders, sometimes right in front of him, and he does nothing about it. TNG : Pen Pals
Q claims that the Borg is "not a he, not a she". Yet later episodes have always shown us male and female drones - the one that captured Picard in "Best of Both Worlds" looked female, and Seven of Nine is about as female as it's possible for a Human to get! TNG : Q Who?
The Enterprise crew make several comments about how the Pakled are advancing faster than they should. Hmm... when Q made this statement about Humanity to Picard, his reaction was along the lines that no species had the right to decide how fast another should advance. TNG : Samaritan Snare
The whole idea of "replicative fading" being a threat to the Mariposans is nonsense. Apparently the problem arises because the Mariposans are cloning each new generation from the cells of the last. Yet even a single Human has literally trillions of cells within his or her body, and freezing them can let you store them indefinitely. When the problem became apparent, all they had to do is take a few billion cells from that generation and store them - then they could clone a million new people per generation, for a thousand generations, without any further degradation. TNG : Up The Long Ladder
Near the end of the episode, Lwaxana fails to realise that Rex is a hologram. How can this be? She's a full Betazoid, wouldn't the lack of thoughts and emotion coming from him make it clear that he wasn't a real person? TNG : Manhunt
In "Yesterday's Enterprise", Captain Garret indicated that 22 years had led to such advances that the Enterprise-D's weapons were quite capable of handling four Romulan warbirds of her era. Here the T'Ong is 75 years out of date, yet it's still supposed to represent a big threat to the area? True, the E-D Garret was talking about was a battleship version from an alternate universe, but it's still hard to believe that this relic would be a serious threat to anybody. TNG : The Emissary
Is Wesley really allowed to use antimatter in his science projects? I know he's meant to be a genius, but if even one milligram of the stuff escapes the explosion would be the equivalent of many tons of normal explosive. That's a risk I'd be awful reluctant to take. TNG : Peak Performance
Riker is having all these dreams of things that have happened to him in the past. So how come several of the scenes he dreams about were events he wasn't actually there for? And lest we say that his imagination was "filling in the gaps", those scenes match exactly to what actually happened at those times! What are the odds of that? TNG : Shades of Gray
Isn't it a crime to kill a sentient life forms in the Federation? Stubbs killed countless numbers of the nanites, yet as soon as they accept his apology Picard apparently considers the matter closed. Surely Stubbs should be arrested and tried for his crimes? TNG : Evolution
As the Enterprise-D is approaching the Sheliak ship, Picard orders Riker to block it's path. Riker responds by punching some buttons on the panel on his chair. Is the helm officer on his break or something? TNG : The Ensigns of Command
Near the end of the episode, Uxbridge teleports himself off the bridge into the turbolift to go to Deanna's quarters. Why bother with the turbolift? Why not just teleport direct to her room? TNG : The Survivors
Dr. Crusher pulls off an amazing job of swift-fingered surgery in this episode. When Riker escapes from the Mintakans by beaming back to the ship, he goes to the bridge to see what's going on down below. The action makes it clear that only seconds have passed, a minute or two at the most - yet Riker's proto Vulcan surgery is completely reversed when he arrives on the bridge! TNG : Who Watches The Watchers?
Early in the episode, Troi recommends that Jeremy must not be left alone in the aftermath of his mother's death. Just minutes later we see Jeremy sitting in his quarters all alone, surrounded by mementos of his dead mother! TNG : The Bonding
The effectiveness of the artificial gravity systems in the Star Trek universe truly is awesome. After all, the Promellian battleship has been adrift for one thousand years, but her gravity systems still work perfectly! TNG : Booby Trap
After her amazing surgical prowess was revealed just a few episodes back, Dr. Crusher's competence takes a knock in this episode. She scans the Romulan and proclaims he has no head trauma. Oh, really? What about the huge gash on the side of his head? What about the fact that Worf knocked him unconcious just minutes earlier by smashing his head into a rockface? Don't these count as head traumas? TNG : The Enemy
At one point, Riker states that LaForge has been in continuous visual contact with the wormhole since the ship arrived. As seen in "Justice", LaForge has to leave the bridge and go to a window to get a good look at something. Has he really been stood at a window somewhere ever since the ship arrived? TNG : The Price
Crusher asks the computer if any of the Acamarian delegation are from the Tralesta clan, and it replies that clan affiliation is not in the records. Odd, since it just gave her the clan affiliation of three other people a moment ago. TNG : The Vengeance Factor
Picard has a big conversation with Data about the morale of the crew in this episode. This is, Data the scientist, operations officer and machine who does not posess or understand emotions. As opposed to Troi, the trained counsellor and empath who is constantly aware of the emotional state of the crew. Does this make sense? TNG : The Defector
Are next generation phasers vastly less powerful than those of the original series? When Kirk had a phaser on overload in "The Conscience of the King" he said it would blow out an entire deck. Yet Danar overloads a phaser here and it produces an explosion about as big as a small firework. Maybe next generation phasers have some sort of safety feature that makes them harder to blow up or something? TNG : The Hunted
This episode shows Riker to be a hypocrite. All through the show he has moaned and grumbled every time Picard wanted to go on an away mission, saying that the Captain's place is on the ship. Well, with Picard gone Riker is in command and what does he do - immediately leads a dangerous away mission into the heart of the terrorist stronghold. TNG : The High Ground
When Q is in sickbay, Picard tells the security guard to follow him. Yet for the entire remainder of the episode, the guard is nowhere to be seen. TNG : Deja Q
On a couple of occasions, Picard calls Krag "Chief Inspector" instead of "Chief Investigator". TNG : A Matter of Perspective
Look at the final scene with Geordi and Guinan on the Enterprise-D after the timeline has been restored; Geordi's uniform still has the modified cuffs of the other timeline on. TNG : Yesterday's Enterprise
Just how can Admiral Haftel come in and try to confiscate Lal? It's already been decided in "The Measure of a Man" that androids have the right to choose their fate. TNG : The Offspring
When Picard accepts Worf's offer to become his cha'DIch, Picard accepts by speaking in Klingon, then translates it into English. Who is he translating it for, exactly? Not Worf, not himself... it's as if he thinks somebody is watching or something! TNG : Sins of the Father
When Picard orders "Ales for everyone!", everyone responds with a cheer. Why is this? After all, it's not like anybody ever actually pays for anything in ten forward! Are just sucking up to the boss? TNG : Allegiance
Early on in the episode, there's a scene in the turbolift in which the doors change from orange to grey between shots. TNG : Captain's Holiday
This episode catches Geordi out disobeying orders and lying to a senior officer. When the Enterprise gets crippled by Tin Man, Riker orders Geordi to give the shields top priority. A little later we see LaForge busy fixing the sensors, after which he reports back to Riker that the shields are still down and he is doing everything he can to fix them. TNG : Tin Man
Twice in this episode people walk in on Barclay playing in the holodeck, embarrasing him immensely. I don't know about you, but I would really, REALLY want to lock the door if I was on a holodeck. Yet there is no indication that anybody over rides a lock in order to get into the holodeck, they just walk in. TNG : Hollow Pursuits
Okay, so Data can't get too close to Fajo without the forcefield zapping him. But this forcefield is specific to Data - normal objects pass straight through it, so Fajo can touch objects or other people. So what stops Data from clubbing Fajo over the head with something? Or just throwing a heavy object at him for that matter? TNG : The Most Toys
The music Data plays in his Mozart concert is actually a piece by Brahms. TNG : Sarek
I guess this can't be classified as a real nit as such, because there's nothing inherently impossible about it - but I find it really hard to believe that Riker reads Ferengi fluently enough to use the computer systems without any difficulty. TNG : Menage a Troi
When the away team beams down at the beginning of the episode, Data pulls out his tricorder and notes that the radiation levels are safe. Is it really wise to check on this kind of thing after you beam down? TNG : Transfigurations
Whe Riker checks that their beam down co-ordinates are right during the trailer, O'Brien tells him he is in the 'centre of town'. Yet the away team is standing on the edge of the crater - so shouldn't more than half the town still be there behind them? Additionally, are we really supposed to believe that the Enterprise arrived and beamed down this away team without noticing that there was a huge crater where the colony used to be? TNG : The Best of Both Worlds, Part 1
Beverly claims that the Borg cannot cut off their link to Locutus, comparing it to a Human cutting off an arm or a leg. Ignoring for a moment the fact that some Humans have done just this in an emergency, the Borg tried to destroy the shuttle carrying Locutus away from their cube in the first place. So it looks like they had no problem cutting the link after all. Also, both the Borg and the Enterprise drop out of warp whilst still many light hours from Earth and do a leisurely impulse cruise to the planet. Wouldn't this have been a good time for the Federation ship to warp right into orbit, like they did in "The Schizoid Man"? TNG : The Best of Both Worlds, Part 2
When Wesley starts up the message from his father, there is no communicator pin on his uniform. Yet a few moments later one magically appears between changes of shot. Why would Crusher have edited the pin from some parts of the program? TNG : Family
When Data locks up the computer, he issues a very long access code to it. Unfortunately, we see the code on the screen quite clearly - and it doesn't match exactly to what Spiner said. TNG : Brothers
In the briefing room scene, the stars in the window constantly drift by in all the close up shots but remain motionless in the wide shots. TNG : Suddenly Human
Beverly has to go to engineering to find the way out of the warp bubble at the end of the episode. Yet every time an attempt was made to extract her previously, the apeture appeared wherever she was at the time. Also, LaForge claims that the bubble is collapsing at 15 metres per second and that it will vanish in four minutes. At this point the bubble has already grown small enough to cut off parts of the ship. Is the ship really 3,600 metres long? TNG : Remember Me
When the Enterprise crew first beam down, Worf worries about Crusher's safety and Riker counters that the hostages may need instant medical attention. So when they actually get around to rescuing the hostages near the end of the episode, why does Crusher stay behind on the ship? TNG : Legacy
When Riker asks the computer where Worf is, it replies that he has beamed over to the Klingon ship. Yet Worf removed his combadge before leaving, and we've seen many times (eg "Power Play") that the computer tracks people purely by where their badge is. The computer should have said that Worf was in his quarters. TNG : Reunion
When Riker wakes up in sickbay, he's told that he's been in a coma for ten days. So why is he still wearing a uniform? Fake-Crusher blames the computer problems on a 'processing attenuator'. Later, Riker says it is the fault of a 'processing accelerator'. TNG : Future Imperfect
LaForge claims to have given the shuttle a full safety inspection, which it passed. So why after the crash do we find that it carried no emergency rations or supplies? Also, Picard claims that the water-cave is natural in origin. So natural processes carved that nice, smooth, regular rock staircase? TNG : Final Mission
Near the end of the episode, Data claims that the evidence supports the idea that it is gravity that is pulling the ship and the 2-D lifeforms into the string. Yet all the way through we are told that the ship is drifting at a constant speed towards the string. If gravity is pulling at the ship, then it would be accelerating rather than moving at a constant speed. TNG : The Loss
Although Spiner does a good imitation of McFadden's tap dancing, there are a few steps that she does which he can't manage to duplicate. As an android, of course, Data should be able to replicate Crusher's dancing pretty much perfectly. TNG : Data's Day
In this episode Ardra claims she has many names, including the Human devil and Klingon Fek'lhr. Yet in "Day of the Dove" Kang claims that the Klingons have no devil. TNG : Devil's Due
The entire premise of this episode makes no sense. The ship's crew spends more than two whole days dealing with the Paxans, and then carefully setting the ship up so that it seems that only thirty seconds have passed. So what happens when the Enterprise reaches its next destination two days late? The people there are bound to ask what caused the delay, Picard will reply with astonishment that as far as he is concerned the ship is on time - and the whole can of worms will be opened again. The problem could have been avoided by claiming that the wormhole had thrown the ship forward in time, but neither Data nor anybody else makes this claim. TNG : Clues
At one point calls a Malcorian a Marconian. TNG : First Contact
Brahms claims that the space baby is partially covering shuttlebay two. But in fact, the bay it is covering has been establihsed several times before as shuttlebay three. TNG : Galaxy's Child
How fast is subspace radio compared to ship speeds? In this episode Picard claims that it will take over two weeks to get any reply from Starfleet - which would be a week for the message to get there and a week for a reply to get back. Yet the ship was at a Federation Starbase just 16.6 stardate units ago - which should be about six days ago. So the ship is actually faster than its own subspace radio? Also there is considerable confusion about the name of the ship in the rift. The name on the hull is "Brittain", yet most backstage sources claim that it is called the Brattain - and this is indeed what the characters in the episode call it. So did Starfleet really paint the wrong name on the hull of one of its ships? TNG : Night Terrors
This episode features a nit common to all stories involving an invisible character - how can Geordi see while he is invisible? Even assuming that the alien transmogrification of his body has repaired his eyes, light must hit your retina and be absorbed in order to allow your brain to percieve things around you. If you are invisible, then the light is passing around or through your retina so you should be blind. Also, if Geordi is invisible to the ship's internal sensor systems then how come the transporter system can lock onto him in order to beam him down? TNG : Identity Crisis
When LaForge is messing about in one of the ship's Jeffries tubes, he gets a torch out and uses it to let him see into a junction box. A torch? Mister 'I can see across the whole electromagnetic spectrum and have a built in telescope and microscope' needs to use a torch? TNG : The N'th Degree
We get a minor demonstration of Q's amazing abilities in this episode. When he opens Vash's letter, he reads it upside down. Obviously this isn't on the scale of moving planets around or anything, but I find it interesting that the Q can read stuff any way up. Also, the creators really need to be more consistent about Data's physical speed and robustness. In 'We'll Always Have Paris' he was fast enough to dodge laser blasts. In 'First Contact' we find that he is bullet proof. In "The Naked Now" he claims that 'if you prick me, do I not leak?'. Well, in this episode Troi fires an arrow at Data. Not only does he fail to dodge it, the arrow comfortably pierces his bullet proof chest and completely fails to cause any leak. TNG : Qpid
Admiral Satie's court reporter dutifully records all the answers people give in the hearings. Strangely, she doesn't bother to write down any of the actual questions!

In TOS, we several times saw people questioned in official hearings whilst being monitored by the computer. The computer, we were told, could act as a lie detector so accurate that it could tell a lie even if you believed that what you were saying was true! How come this device is not used in this episode? Even if we assume that the defendant would have the option to decline so as to avoid self-incrimination - something they apparently could not do in TOS - surely Simon Tarses would jump at the chance to prove he was not in fact a traitor once and for all?

TNG : The Drumhead
The Trill in this episode are totally different from the way they appear in DS9. These Trill have no spots, a built up forehead, and when the symbiont joins with the host it takes over the host personality completely. So, does the planet Trill have two different races as different from one another as Earth's different types of dogs? Or are there two completely different planets that both happen to be called Trill and have joined species? And while we're on the subject, why would anybody ever agree to be a permanent host for this version of the Trill? The hosts are clearly shown as sentient beings, yet their entire personality is completely overwritten by the symbiont. Do the symbionts hold the hosts in some kind of slavery? TNG : The Host
Geordi and Data test out a phaser rifle in this episode. In order to do this they set up the weapon in the middle of main engineering. They fire it into a small target apparatus directly in front of the master situation display, and don't even go to the trouble of putting up a warning sign or rope barrier to stop people walking into the beam. I don't know what kind of safety regulations there are for firing phaser beams aboard ship, but surely they can do better than this! TNG : The Mind's Eye
At one point a female crewemember walks past Geordi, goes around a corner and then screams a few moments later. Geordi runs back to see what is wrong and finds her half buried in the floor as a result of an encounter with a bit of dark matter. The thing is, she is facing him as he goes around the corner - yet she was walking in the opposite direction so she should have her back to him. TNG : In Theory
Gowron claims that women cannot serve on the high council. Yet in Star Trek VI, Gorkon's daughter Azetbur replaced him as the leader of the council after his death.

Also, we see in this epoisode that Worf has red blood. Why isn't it purple, like all the blood in ST VI was? Does Klingon blood only become purple when they are in zero gee for a few minutes?

TNG : Redemption, Part 1
Picard tells the Admirals he meets that they should send a "freet" to the Romulan border. What the hell is a "freet"? TNG : Redemption, Part 2
At one point we see the Epterprise fire a phaser out of it's photon torpedo launcher. TNG : Darmok
Why does Ro wear her earring on the left ear when every other Bajoran in history wears theirs on the right? And why don't regulations allow an earring when they do allow Worf's big sash? TNG : Ensign Ro
Even assuming that there really was no way to shut down the transmitter Marr used to destroy the crystalline entity, why did Picard not simply warp away from the creature? Also, if the crystalline entity destroys planets in a matter of hours as shown here, how come the children of Data's colony had time to draw pictures of it? TNG : Silicon Avatar
Geordi claims that opening the cargo bay doors will cause the drums of chemicals to be sucked out into space. Surely he means they will be blown out?

And while we're on the subject of Geordi, when Crusher leans against the wall and tells him that it's hot, he looks up and says "where?" But his VISOR can see infa red light, so he should have seen the heat trace on the wall long before they went anywhere near it.

TNG : Disaster
Crusher calls Data to sickbay in order to incapacitate him, then covers by claiming that he came in complaining of a malfunction before shutting down. Yet Geordi was right next to Data when Crusher called him, so why doesn't he object to this cover story? Also, the torpedo launcher which fired a phaser beam in Darmok can now emit tractor beams! TNG : The Game
In this episode Crusher asks Data if his ears are removable and he says no. Yet in Datalore we saw that his ears are in fact removable. TNG : Unification, Part 1
Troi suggests that there could be a cloaked Romulan base on Galornden Core in this episode. Yet in "The Defector" Data says that a cloaked base on the surface would be visible due to the distortion of the background, and in "The Enemy" we find that the magnetic fields on Galornden Core would rapidly become fatal for Humans and Romulans. Guess Troi should stick to the day job.

Also, it was nice of Sela to lock Data, Spock and Picard in her office without any kind of guard so that they could plan their escape and use her computer system to foil her entire plan, wasn't it?

And finally, the job descriptions get all mixed up towards the end of this one. Crusher announces that she has recieved a distress call from a nearby colony, and Riker responds by ordering LaForge to set a course for it. Since when do Doctors handle communications and Engineers handle the helm?

TNG : Unification, Part 2
Picard claims that he has inspected Rasmussen's credentials and that they seem to be in order. Huh? Does Rasmussen really have an "Official Federation Time Traveller" card, and how would Picard know it was genuine if he did?

The Enterprise crew use the computer to disable a phaser by remote control in this episode. What a fabulously useful function for the computer to have! One wonders why they didn't bother to use it in "Power Play", "The Hunted", "The Game", "Datalore", "First Contact"...

At the climax of the episode, Picard must face a tough decision - he might be able to save the planet, but only by risking the destruction of the Enterprise. Wouldn't this be a good time to separate the ship and evacuate the civilians on the saucer section?

TNG : A Matter of Time
Since Worf's last name is Rozhenko, why is he continually called Worf even by junior officers?

In this episode, Alexander's classmates go on a trip to see models of extinct animals. Why wouldn't their teacher take them to the holodeck so they could see living versions of these creatures?

Worf gets paged by various people during his meeting with the captain. Does this seem right? I know Picard doesn't have a secretary, but surely the computer can be set to hold all but emergency pages from the comm system during meetings?

TNG : New Ground
Data gets Geordi's rank wrong in this episode; he calls him "Lieutenant", when Lieutenant Commanders are normally called "Commander". TNG : Hero Worship
Riker claims that he does not know if Troi can hear him whilst in a coma in this episode. Even today you can tell if a person can hear a sound by examining their brain wave patterns - this is how they diagnose deafness in very young children. Has Starfleet lost this ability? Or does it just not work on Betazoid women? TNG : Violations
Watch Riker when he goes to meet Hannah Bates; head down, striding manfully forwards, he almost walks into a wall! TNG : The Masterpiece Society
Why didn't the Satarran MacDuff make himself Captain instead of First Officer? For that matter, why didn't he have a few of his friends along on the mission in other key places?

When Riker says there is no voice interface to the computer, LaForge says that there is no interface, period. He then goes on to use the work station behind him to use the computer. Doesn't this count as an interface?

And I don't mean to be nasty, but does anybody else find it hard to believe that Troi beats Data at chess?

TNG : Conundrum
Gee, it sure would have been useful to use the computer to disable the terrorist's phasers in this episode the way it did in "A Matter of Time", wouldn't it?

Riker tells Picard that Data, O'Brien and Troi are trying to take over the ship. But Riker was unconcious when Troi did her bit of the taking over, so how did he know about her?

TNG : Power Play
This episode makes it clear just how hard it is to kill a Klingon - they even have a backup brain that can bring them back from death! So how come Worf has at least twice threatened to kill himself with a knife (Night Terrors and this episode)? Surely he would recover from this fairly easily?

The number of times that the Enterprise gets banged around enough to - almost - throw a person off their feet is so great it is one of the best known cliches of the entire Trek legend. Yet not only do they never have seatbelts, they never make any effort to tie down their cargo containers!

TNG : Ethics
My, Worf seems to have recovered quickly. Last episode he was struggling to take more than a step or two, yet here only 33.1 Stardate units later - 12 days in real time - he is not only walking normally, he is beating people up! TNG : The Outcast
This whole episode hinges on whether to use the tractor beam or the explosive decompression of the shuttlebay to avoid the collision with the Bozeman. Why not do both together? TNG : Cause and Effect
Data claims to have graduated in the "class of 78." Since it is now 2368, as dated from "The Neutral Zone" in which Data says it is 2364, did Data really graduate ninety years ago?

Riker claims that the Vulcan superintendant made being at the academy like "being with your parents". Riker's mother died when he was very young and his father was hardly ever around, so how would he know what being with your parents is like?

TNG : The First Duty
We're told that there are intermittent failures in the IDF system, and Picard's first reaction is to order the ship to halt. Risky! The IDF is all that stops the crew getting smeared over the bulkheads by the huge accelerations of the ship, so ordering it to slow down while the system is failing is not a good idea. Ideally, you would hold the exact same speed whilst fixing the problem. TNG : Cost of Living
It's not a real YATI as such, but it's odd that Kamala looks exactly like a Trill. TNG : The Perfect Mate
Troi reports that Clara had a good time at pottery class. In fact Isabella smashed Alexander's sculpture and threw pottery at him, Worf blamed Clara, and she ran out of the room crying. Doesn't sound like a good time to me. TNG : Imaginary Friend
When beaming down, Riker orders Crusher to beam down and he asks her to bring a medical team, but she doesn't.

Also, Picard is amazed when Hugh gives up his "we" and "us" speech and finally says "I". Yet one of the first thing Hugh says after coming aboard is "Do I have a name?"

TNG : I, Borg
The whole premise of this episode makes no sense. Light and matter passes through Ro and Geordi so they are invisible and walk through walls... yet they can still see, still breathe the air and talk to one another, still stand on the floor and sit on a chair. TNG : The Next Phase
Why doesn't Troi appear in this episode? Surely it would be useful to have her monitoring Picard's mind while he is unconcious, like she did with Riker in "Shades of Grey". TNG : The Inner Light
Data pawns his communicator for three dollars, and gets three coins. He throws one coin into the pot as his ante for the first game. But the ante was said to be "four bits", or fifty cents. TNG : Time's Arrow, Part 1
In "The Child", Guinan tells Wesley that she never met Picard before coming aboard the Enterprise. Yet this episode establishes that she met Picard centuries before her arrival on the ship. While Guinan would undoubtedly want to protect the timeline by not revealing details of this meeting, it doesn't seem like her to tell such a direct lie.

Also, why does Geordi openly wear his VISOR whilst wandering the 19th century hospital where locals can see him?

TNG : Time's Arrow, Part 2
At one point in this episode, Troi releives Barclay of duty. Yet soon afterwards he goes to the transporter room and starts ordering O'Brien around. Now while it's entirely believable that Barclay would disobey orders, wouldn't O'Brien know that Barclay had been relieved and thus refuse to do as he ordered? TNG : Realm of Fear
Troi has stated several times that her empathic sense allows her to tell when a person is lying to her. So when Alkar asked her to participate in his little ceremony, why didn't she sense that there was something amiss? TNG : Man of the People
Just where is the Dyson sphere? Scotty was on his way from Earth, or at least somewhere near to Earth, to the Norpin colony. Presumably the sphere lies somewhere on a more or less straight line between the two. Presumably there is at least semi-regular traffic between the Federation and its colony world. So Federation exploratory ships have been this way, and transports have been passing through the area for at least seventy five years, yet in all that time nobody has noticed the sphere?

Also, in a classic nit the Enterprise-D beams Geordi and Scotty off the Jenolen whilst its shields are still raised. Presumably they were able to use the kind of transporter window that O'Brien used to board the Sutherland in "The Wounded".

TNG : Relics
Geordi claims that cargo bay 4 is on deck 4. Yet the big schematic display of the ship shows it on deck 10, and in "Power Play" when Worf, Troi and O'Brien head for cargo bay 4 they get off the turbolifts on deck 18. TNG : Schisms
Why, if they are rushing to assist Tagra IV, does the Enterprise-D appear to be at impulse speed every time we see an external shot? TNG : True-Q
Skipping lightly over the fact that the younger Picard has a different accent, no dimple in his chin and different eye colour, what happened to his artificial heart? A full sized adult heart wouldn't fit the chest of a child, after all.

At one point a pair of automatic doors slide open and a little robot comes through to distract a Ferengi. As Data says in "In Theory", "the door sensor is programmed to recognise only Humanoid forms for entrance and egress."

TNG : Rascals
When Troi shoots Eli Hollander's hat off, he turns to look at her before dropping his weapon. Yet Troi is using a lever-action rifle; she didn't cock it after firing, so Hollander would easily be able to turn and shoot her before she could do anything more to him. TNG : A Fistful of Datas
Data and Crusher really put up a poor showing in their discussion of life. First she claims it is "what enables plants and animals to consume food, derive energy from it, grow, adapt themselves to their surroundings and reproduce". Data quickly points out that fire meets these criteria but is not alive. Crusher says that it does not count because it is a chemical reaction, and says that you could use the same argument for growing crystals. Data then asks about himself, claiming he does not grow or reproduce yet is considered to be alive. On a strictly factual point, both have made mistakes. Data claims that he does not reproduce - yet in "The Offspring", he clearly considered Lal to be his offspring. Crusher claims that crystals are not alive, yet both the crystal from "Home Soil" and the Crystalline entity from "Datalore" and "Silicon Avatar" are (or where) alive. Crusher's ruling out of chemical reactions as being alive makes little sense also - what is a person if not a collection of chemical reactions? And whilst Data has been declared to have sentience and equal rights to others, I don't know that he has ever been stated to be alive as such.
Currently, in order to be considered alive something must grow, consume food, excrete waste, respire, reproduce, move all or part of itself and respond to stimuli. Fire does indeed meet some of these criteria, but does not respond to stimuli and so is not alive. It's unclear how the crystal life forms in Trek would fare under this definition, but Data would probably not be considered alive.
TNG : The Quality of Life
When Picard's team goes to Torman V, there is a Tamarian in the background of the bar. Have the Tamarians learned conventional language well enough to order drinks? Or did he sit down and say something like 'Alkazar, long in the desert'? TNG : Chain of Command, Part 1
Why does Gul Madred's daughter wear a military uniform? Isn't she a little young to be in the military, or is there some sort of youngster's cadet force on Cardassia? TNG : Chain of Command, Part 2
Picard and Data conclude at one point that Moriarti has set the computers to respond only to his voice. So what's the problem? Data can imitate voices perfectly, as seen in "Brothers", so he can still give the computer orders. TNG : Ship in a Bottle
When the dog/alien attacks Geordi, the Engineer does an excellent job of dodging about and then grabs a phaser from one of his draws and vapourises it. I find it interesting that Geordi keeps a phaser in his quarters, but more importantly - why does he never once call for help from security? TNG : Aquiel
Mister DeSeve defected to the Romulans nearly twenty years ago because he was so impressed by their single-mindedness. Yet in "The Neutral Zone", it is claimed that there has been no contact with the Romulans for fifty three years! What could DeSeve have found so impressively single minded about several decades of total silence? TNG : Face of the Enemy
Picard claims to have graduated in the class of 27, and that the incident with the Nausicaans occurred thirty years ago. In first season episode "The Neutral Zone", Data claimed that the current date was 2364. So at the time of this episode in season six, it should be 2369. Which dates the incident on the station to 2339. So either Picard rounded his "thirty years" an awful lot - "forty years" would have been closer - or he waited twelve years between graduating and getting his first deep space assignment! TNG : Tapestry
When Data is painting in his quarters, he stops and steps back to admire his work. You can still hear the brush against the canvas in the background. TNG : Birthright, Part 1
Worf is disgusted that the Klingons allow themselves to be captured alive. Yet he allows himself to be captured alive, both here and several times in the future. TNG : Birthright, Part 2
Picard tries to escape the Enterprise after disabling Tuvo- er, a terrorist. He fails because the power goes out. Why not use a shuttle? The transporter on a shuttle? The Captain's yacht? An escape pod? TNG : Starship Mine
When Picard and Darren ride the turbolift together, a crewmember enters and rides it with them. I guess she just assumed that it was going her way, because she never gives it any kind of instruction or asks its destination. TNG : Lessons
I have to wonder where dinosaurs figure into the Progenitor species plans. The dinosaurs were the dominant lifeform on Earth for over a hundred million years, and it was largely due to a fluke asteroid impact that they died out and mamals became the dominant life form, and that primates and then Huanoids subsequently developed. How does this square with the idea that the Progenitor DNA code has been directing evolution towards humanoids all along? TNG : The Chase
LaForge brings an injured man to sickbay at one point. Isn't it a big no-no to move a badly injured person around like this? Isn't that why normal procedure is to call an emergency medical team to go to your location rather than vice versa? Of course, Riker is imagining it all so maybe he just imagined this part wrong. TNG : Frame of Mind
Jo'brill took an awful chance, pretending to be dead like that. It's a good thing Crusher didn't autopsy him. TNG : Suspicions
One of the ways Kahless tries to convince Worf that he is real is to talk about a vision of Kahless Worf had as a child. So since Kahless turns out to be a fake, how did he know about Worf's vision? And if Worf had told people about it, then why wouldn't he object that Kahless knowing about it was no proof that he was real? TNG : Rightful Heir
Surely Lieutenant Riker should get the same promotion as Commander Riker did for his actions on Nervala IV. They were both the same person then, after all. TNG : Second Chances
When Picard puts his hand into a time distortion, it ages sufficiently that the nails grow considerably. So... that's at least weeks if not months. And for all that time the rest of his body, outside the time distortion, would not have been supplying the hand with blood. Picard should have pulled out something a lot more unpleasant looking than a hand with long fingernails... TNG : Timescape
Okay, I can accept that Picard wanted the maximum number of people on the planet's surface to search for Data. But it still makes no sense that he be one of those searching! For example, suppose Picard switched places with the young man on the bridge. There would be just as many people searching for Data, yet the Captain would be on the bridge where he belongs. TNG : Descent, Part 1
When Data brings Geordi back from the experiments, Troi asks him if he is in pain. That is, Troi the empath, who should be able to feel his pain from down the hallway. TNG : Descent, Part 2
How long are these aliens on the ship for? Worf says he is showing them around for three days, but the ambassador says he is looking forward to an enjoyable seven days. TNG : Liaisons
When Geordi is exploring the Raman, he says that there are some poisonous gases in the corridor. Then he arrives at a bay door and says that the crew are probably took refuge behind it. Then he opens the door! Great idea LaForge, what if there had been fifty survivors behind that door who are now exposed to the poison gases? TNG : Interface
The crew do a horrible job of working undercover in the bar. They do manage to wear civilian clothes, but they wave Starfleet phasers and tricorders around, talk about finding Starfleet fabric traces, and basically do everything short of waving big signs saying "WE ARE STARFLEET" around. TNG : Gambit, Part 1
I'm a bit confused about how Baran died. I get that Picard switched the codes so that when Baran tried to activate Picard's implant and kill him, it activated Baran's implant instead. But... why the hell does Baran have an implant? TNG : Gambit, Part 2
Not a nit as such... but wouldn't replacing a warp core be something that you would go into spacedock for? It's a pretty major bit of equipment, after all. If it doesn't work, the ship is stranded years away from anywhere unless somebody comes and tows them back home.

Also, why does Data go and consult a holodeck character about his dream? After all, there is a real live counsellor on board - one whose knowledge of psychology isn't four or five centuries out of date, at that. Shouldn't he go talk to Troi herself?

TNG : Phantasms
In "Haven", Lwaxana claimed that Betazoids prided themselves on "complete honesty". Well judging by this episode I guess they don't actually do any such thing. TNG : Dark Page
While having one of their heart to heart talks, Picard and Crusher confess that they do not 'feel that way' about each other any more. So why do we then have this big 'will they won't they' scene at the end? TNG : Attached
So the Enterprise is going to get a "kick" out of its warp engine and cruise out of the rift at warp speed, beaming the crew off the Flemming as they pass. I thought you had to exactly match warp speeds to use transporters, as O'Brien's dialogue in "Best of Both Worlds, Part I" indicates? TNG : Force of Nature
So why don't Troi and Geordi know instantly that Juliana is an android? Troi's empathic sense should give the game away, and Geordi should see the glow around her as he did Data in "Heart of Glory". TNG : Inheritance
I'm a bit confused about the Cardassian's plan to use the telescope thingie as a spy device against the Federation. I mean, it's a Federation installation. It presumably sends data to Starfleet all the time. Do the Cardassians really think that when it stops sending information, Starfleet will just shrug its shoulders and forget about it? Of course not! They'll send a ship to investigate, and the Cardassians will be caught in the act - which is exactly what happened. It would make much more sense for the Cardassians to just blow the thing up and make a hasty exit, then deny all knowledge afterwards. TNG : Parallels
Pressman claims that the Romulans have found a piece of the Pegasus. Okay... but it turns out that the Pegasus never exploded. So either bits just fell off the ship for no good reason, or the Admiral is lying. Admittedly the latter possibility is not wholly unlikely...

Just out of curiosity, isn't Picard also guilty of violating the treaty when he uses the Pegasus phase cloak device to escape the asteroid? I wonder what he would have done if the Romulan captain he declared that he was under arrest and asked him to come aboard their ship for return to Romulus to stand trial?

TNG : The Pegasus
I have to say, I think the Prime Directive is a pretty good idea most of the time... protecting the primitives from exploitation, harmful interference and all that. But I mean, these people were all going to die. Just how bad could any degree of interference be compared to that? TNG : Homeward
Okay, what about marriage and names in the 24th century? Beverly Howard became Beverly Crusher when she married Jack Crusher. So apparently the whole thing about women taking the man's surname still applies. Yet the alien dude says that his first host was Jessel Howard, hundreds of years previously. Shouldn't Jessel have had a different surname? Or did all of Beverly's ancestors keep their surname, and she broke with the tradition and decided to adopt her husband's?