| Canon source | Backstage source | Novel source | DITL speculation |
| # | Series | Season | Source | Comment |
| 1 | TOS | 2 | The Trouble With Tribbles | |
| 2 | SNW | 2 | Lost in Translation |
| Series : | TOS Season 2 |
| Episode : | The Trouble With Tribbles |
| Series : | SNW Season 2 |
| Episode : | Lost in Translation |
| © Graham & Ian Kennedy | Page views : 2,190 | Last updated : 13 Apr 2014 |
