| Title | Season Episode | Airdate | Stardate | Year | Rating | |
| Mudd's Women | 1 x 04 | 4 | 13 Oct 1966 | 1329.8 | 2266 |  |
| Dagger of the Mind | 1 x 11 | 11 | 3 Nov 1966 | 2715.1 | 2266 | |
| The Return of the Archons | 1 x 23 | 23 | 9 Feb 1967 | 3156.2 | 2267 | |
| Metamorphosis | 2 x 02 | 32 | 10 Nov 1967 | 3219.8 | 2267 | |
| The Apple | 2 x 09 | 39 | 13 Oct 1967 | 3715.3 | 2267 | |
| Patterns of Force | 2 x 23 | 53 | 16 Feb 1968 | Unknown | 2268 | |
| The Paradise Syndrome | 3 x 03 | 59 | 4 Oct 1968 | 4842.6 | 2268 | |
| And the Children Shall Lead | 3 x 05 | 61 | 11 Oct 1968 | 5029.5 | 2268 | |
| For the World is Hollow and I Have Touched the Sky | 3 x 10 | 66 | 8 Nov 1968 | 5476.3 | 2268 | |
| That Which Survives | 3 x 14 | 70 | 24 Jan 1969 | Unknown | 2268 | |
| Whom Gods Destroy | 3 x 16 | 72 | 3 Jan 1969 | 5718.3 | 2268 | |
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