| Series |  |
 |
|
|
|
|
|
|
| The Original Series | 2 | 1 | 0 | 1 | 0 | 0 | 0 | 1.00 |
| The Next Generation | 2 | 0 | 0 | 1 | 1 | 0 | 0 | 2.50 |
| Total | 4 | 1 | 0 | 2 | 1 | 0 | 0 | 1.75 |
| Title | Season episode | Airdate | Stardate | Year | Rating | |
| The Immunity Syndrome | 2 x 19 | 49 | 19 Jan 1968 | 4307.1 | 2268 |  |
| The Lights of Zetar | 3 x 18 | 74 | 31 Jan 1969 | 5725.3 | 2269 |  |
| Title | Season episode | Airdate | Stardate | Year | Rating | |
| Home Soil | 1 x 17 | 17 | 22 Feb 1988 | 41463.9 | 2364 | |
| Conspiracy | 1 x 24 | 24 | 9 May 1988 | 41775.5 | 2364 |  |
| © Graham & Ian Kennedy | Page views : 13,180 | Last updated : 27 Jul 2022 |