


The crew of Moonbase Alpha must struggle to survive when a massive explosion throws the Moon from orbit into deep space.

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24 episodes • 1975Avg: 6.4Golden Era
| # | Episode | Air Date | Rating |
|---|---|---|---|
| 1 | Breakaway | Sep 4, 1975 | 7.3 |
| 2 | Force of Life | Sep 11, 1975 | 6.0 |
| 3 | Collision Course | Sep 18, 1975 | 6.3 |
| 4 | War Games | Sep 25, 1975 | 6.7 |
| 5 | Death's Other Dominion | Oct 2, 1975 | 6.7 |
| 6 | Voyager's Return | Oct 9, 1975 | 7.3 |
| 7 | Alpha Child | Oct 16, 1975 | 6.0 |
| 8 | Dragon's Domain | Oct 23, 1975 | 7.7 |
| 9 | Mission of the Darians | Oct 30, 1975 | 4.8 |
| 10 | Black Sun | Nov 6, 1975 | 6.8 |
| 11 | Guardian of Piri | Nov 13, 1975 | 6.7 |
| 12 | End of Eternity | Nov 20, 1975 | 6.5 |
| 13 | Matter of Life and Death | Nov 27, 1975 | 5.7 |
| 14 | Earthbound | Dec 4, 1975 | 7.3 |
| 15 | The Full Circle | Dec 11, 1975 | 4.5 |
| 16 | Another Time, Another Place | Dec 18, 1975 | 7.0 |
| 17 | The Last Sunset | Jan 1, 1976 | 7.0 |
| 18 | The Infernal Machine | Jan 8, 1976 | 7.0 |
| 19 | Ring Around the Moon | Jan 15, 1976 | 5.7 |
| 20 | Missing Link | Jan 22, 1976 | 5.0 |
| 21 | Space Brain | Jan 29, 1976 | 6.0 |
| 22 | The Troubled Spirit | Feb 5, 1976 | 4.5 |
| 23 | The Testament of Arkadia | Feb 12, 1976 | 7.0 |
| 24 | The Last Enemy | Feb 19, 1976 | 8.0 |

24 episodes • 1976Avg: 5.5Valley of Despair
| # | Episode | Air Date | Rating |
|---|---|---|---|
| 1 | The Metamorph | Sep 4, 1976 | 6.5 |
| 2 | The Exiles | Sep 11, 1976 | 6.5 |
| 3 | Journey to Where | Sep 18, 1976 | 6.0 |
| 4 | One Moment of Humanity | Sep 25, 1976 | 4.3 |
| 5 | Brian the Brain | Oct 2, 1976 | 6.0 |
| 6 | New Adam New Eve | Oct 9, 1976 | 5.5 |
| 7 | The Mark of Archanon | Oct 16, 1976 | 5.0 |
| 8 | The Rules of Luton | Oct 23, 1976 | 3.5 |
| 9 | All That Glisters | Oct 28, 1976 | 5.0 |
| 10 | The Taybor | Nov 4, 1976 | 4.0 |
| 11 | Seed of Destruction | Nov 11, 1976 | 6.0 |
| 12 | The AB Chrysalis | Nov 18, 1976 | 6.5 |
| 13 | Catacombs of the Moon | Nov 25, 1976 | 3.0 |
| 14 | Space Warp | Dec 2, 1976 | 5.5 |
| 15 | A Matter of Balance | Dec 9, 1976 | 6.0 |
| 16 | The Beta Cloud | Dec 16, 1976 | 5.5 |
| 17 | The Lambda Factor | Dec 23, 1976 | 6.5 |
| 18 | The Bringers of Wonder (1) | Aug 4, 1977 | 5.3 |
| 19 | The Bringers of Wonder (2) | Aug 11, 1977 | 4.5 |
| 20 | The Seance Spectre | Aug 18, 1977 | 5.5 |
| 21 | Dorzak | Aug 25, 1977 | 6.5 |
| 22 | Devil's Planet | Sep 1, 1977 | 6.0 |
| 23 | The Immunity Syndrome | Oct 29, 1977 | 6.0 |
| 24 | The Dorcons | Nov 12, 1977 | 6.0 |