
| Year | Event | ||||||
| 2362 | 
         ● [1]
         The Setlik III Massacre takes place. This marks the first time that O'Brien has ever killed another person. [2]
       
 | ||||||
| 2367 | 
 | 
| Canon source | Backstage source | Novel source | DITL speculation | 
| # | Series | Season | Source | Comment | 
| 1 | TNG | 6 | Realm of Fear | O'Brien says he has been using Transporters for 22 years. In | 
| 2 | TNG | 4 | The Wounded | 
| Series : | TNG Season 6 | 
| Episode : | Realm of Fear | 
| Comment : | O'Brien says he has been using Transporters for 22 years. In | 
| Series : | TNG Season 4 | 
| Episode : | The Wounded | 
| © Graham & Ian Kennedy | Page views : 12,197 | Last updated : 31 Oct 2025 |