The Enemy Within - "Can half a man live?"
City on the Edge of Forever - Preventing McCoy from saving Edith
Balance of Terror - Comforting a crewman who had lost her fiance
A Taste of Armageddon - Ending the Eminiar/Vendikar war practically single-handedly
Star Trek II - "KHAAAAAAAAAAAAAAAAN!!!!!!!!"
Star Trek II - Reconciling with David
Star Trek III - Stealing the Enterprise
Star Trek III - Destroying the Enterprise
Star Trek V : "Excuse me... what would God need with a Starship?"
Star Trek VI - "LET them die!
"Star Trek VI - "You've restored my father's faith." "And you've restored my son's."
Star Trek Generations - Death scene