| Canon source | Backstage source | Novel source | DITL speculation |
| # | Series | Season | Source | Comment |
| 1 | TOS | 2 | Metamorphosis | |
| 2 | DS9 | 4 | Little Green Men | |
| 3 | VOY | 2 | Investigations | |
| 4 | VOY | 2 | The 37's | |
| 5 | VOY | 3 | Coda | |
| 6 | ENT | 3 | The Council |
| Series : | TOS Season 2 |
| Episode : | Metamorphosis |
| Series : | DS9 Season 4 |
| Episode : | Little Green Men |
| Series : | VOY Season 2 |
| Episode : | Investigations |
| Series : | VOY Season 2 |
| Episode : | The 37's |
| Series : | VOY Season 3 |
| Episode : | Coda |
| Series : | ENT Season 3 |
| Episode : | The Council |
| © Graham & Ian Kennedy | Page views : 12,837 | Last updated : 3 Apr 2014 |
