| Canon source | Backstage source | Novel source | DITL speculation |
| # | Series | Season | Source | Comment |
| 1 | TNG | 6 | Descent, Part 1 | |
| 2 | TNG | 4 | The N'th Degree |
| Series : | TNG Season 6 |
| Episode : | Descent, Part 1 |
| Series : | TNG Season 4 |
| Episode : | The N'th Degree |
| © Graham & Ian Kennedy | Page views : 7,247 | Last updated : 5 Jan 2020 |
