| Canon source | Backstage source | Novel source | DITL speculation |
| # | Series | Season | Source | Comment |
| 1 | TOS | 3 | The Enterprise Incident | |
| 2 | TNG | 1 | When the Bough Breaks | |
| 3 | TNG | 2 | Contagion | |
| 4 | TNG | 7 | The Pegasus | |
| 5 | DS9 | 2 | Profit and Loss | |
| 6 | ENT | 4 | In A Mirror, Darkly | |
| 7 | ENT | 2 | Minefield |
| Series : | TOS Season 3 |
| Episode : | The Enterprise Incident |
| Series : | TNG Season 1 |
| Episode : | When the Bough Breaks |
| Series : | TNG Season 2 |
| Episode : | Contagion |
| Series : | TNG Season 7 |
| Episode : | The Pegasus |
| Series : | DS9 Season 2 |
| Episode : | Profit and Loss |
| Series : | ENT Season 4 |
| Episode : | In A Mirror, Darkly |
| Series : | ENT Season 2 |
| Episode : | Minefield |
| © Graham & Ian Kennedy | Page views : 47,519 | Last updated : 20 Sep 2016 |
