| Canon source | Backstage source | Novel source | DITL speculation |
| # | Series | Season | Source | Comment |
| 1 | TOS | 1 | The Enemy Within | |
| 2 | STP | 2 | The Star Gazer | |
| 3 | SNW | 2 | Lost in Translation |
| Series : | TOS Season 1 |
| Episode : | The Enemy Within |
| Series : | STP Season 2 |
| Episode : | The Star Gazer |
| Series : | SNW Season 2 |
| Episode : | Lost in Translation |
| © Graham & Ian Kennedy | Page views : 28,632 | Last updated : 13 Apr 2014 |
