| Canon source | Backstage source | Novel source | DITL speculation |
| # | Series | Season | Source | Comment |
| 1 | TNG | 2 | Where Silence Has Lease | |
| 2 | TNG | 4 | The Best of Both Worlds, Part 2 | |
| 3 | TNG | 5 | The First Duty | |
| 4 | TNG | 1 | Hide and Q | |
| 5 | STP | 2 | Farewell |
| Series : | TNG Season 2 |
| Episode : | Where Silence Has Lease |
| Series : | TNG Season 4 |
| Episode : | The Best of Both Worlds, Part 2 |
| Series : | TNG Season 5 |
| Episode : | The First Duty |
| Series : | TNG Season 1 |
| Episode : | Hide and Q |
| Series : | STP Season 2 |
| Episode : | Farewell |
| © Graham & Ian Kennedy | Page views : 25,349 | Last updated : 2 Apr 2014 |
