Click on episode title for comments by Johnny Byrne (Critical commentary, 1975), Richard Houldsworth (TV Zone, 1992+), Chris Bentley (SFX, 1996), John Kenneth Muir, James O'Neill (Sci-Fi On Tape, 1997), Anthony McKay (DWB, 1992+) and others.
| Number | Episode | Johnny Byrne (out of 5) (1975) | Dreamwatch (out of 10) (1996) | Chris Bentley/ SFX (1996) | Sci-Fi On Tape (out of 8) (1997) | Bob Wood (out of 10) (2002) |
Bob Wood (out of 10) (2010) |
Alasdair Stuart (out of 5) (2007) | Adrian Sherlock (out of 10) (2018-23) |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Breakaway | 4 | 7 | A+ | 6 | 8.5 | 8 | 4 | 10 |
| 2 | Matter Of Life And Death | 3 | B- | 5 | 8 | 7 | 4 | 8 | |
| 3 | Black Sun | 4 | 8 | A | 5 | 9.5 | 9 | 3 | 10 |
| 4 | Ring Around The Moon | 3 | 3 | C- | 4 | 7 | 6 | 2 | 7 |
| 5 | Earthbound | 3 | 9 | A | 6 | 9 | 8 | 3 | 10 |
| 6 | Another Time, Another Place | 3 | 5 | A+ | 6 | 10 | 9.5 | 3 | 10 |
| 7 | Missing Link | 2 | 7 | C+ | 6 | 8.5 | 8 | 2 | 8 |
| 8 | Guardian of Piri | 2 | 3 | A | 4 | 9.5 | 9 | 3 | 9 |
| 9 | Force Of Life | 5 | 9 | A- | 5 | 9.5 | 9 | 3 | 9 |
| 10 | Alpha Child | 3 | 7 | B- | 5 | 6 | 5 | 4 | 8 |
| 11 | The Last Sunset | 3 | 7 | A+ | 4 | 9 | 7.5 | 4 | 9 |
| 12 | Voyager's Return | 3 | 9 | B+ | 4 | 8.5 | 7.5 | 4 | 10 |
| 13 | Collision Course | 5 | 4 | B+ | 5 | 10 | 9 | 3 | 10 |
| 14 | Death's Other Dominion | 5 | 10 | A+ | 5 | 10 | 8.5 | 3 | 10 |
| 15 | The Full Circle | 3 | 5 | C | 3 | 8 | 6.5 | 2 | 6 |
| 16 | End Of Eternity | 2 | 5 | A | 4 | 9 | 8 | 4 | 9 |
| 17 | War Games | 5 | 8 | A- | 4 | 10 | 9.5 | 5 | 8 |
| 18 | The Last Enemy | 1 | C | 4 | 7 | 5 | 3 | 9 | |
| 19 | The Troubled Spirit | 4 | A+ | 5 | 10 | 9 | 2 | 9 | |
| 20 | Space Brain | 3 | B- | 4 | 7 | 6.5 | 2 | 7 | |
| 21 | The Infernal Machine | 4 | A+ | 5 | 9.5 | 9 | 3 | 9 | |
| 22 | Mission Of The Darians | 5 | A+ | 5 | 10 | 9 | 3 | 9 | |
| 23 | Dragon's Domain | 5 | A+ | 7 | 10 | 9 | 4 | 10 | |
| 24 | The Testament Of Arkadia | 3 | A+ | 4 | 10 | 9 | 4 | 9 | |
| 25 | The Metamorph | 8 | A | 6 | 9 | 8.5 | 9 | ||
| 26 | The Exiles | 3 | B+ | 5 | 9 | 8 | 8 | ||
| 27 | One Moment Of Humanity | 8 | B | 5 | 10 | 9 | 7 | ||
| 28 | All That Glisters | 6 | D- | 1 | 6.5 | 5.5 | 7 | ||
| 29 | Journey To Where | 7 | A- | 6 | 10 | 9 | 10 | ||
| 30 | The Taybor | 6 | D- | 4 | 6 | 5 | 7 | ||
| 31 | The Rules Of Luton | 7 | D+ | 5 | 5 | 4.5 | 7 | ||
| 32 | The Mark Of Archanon | 9 | B+ | 4 | 4 | 3.5 | 6 | ||
| 33 | Brian The Brain | 6 | B+ | 5.5 | 4 | 7 | |||
| 34 | New Adam, New Eve | 5 | B | 9 | 8 | 7 | |||
| 35 | The Catacombs Of The Moon | 7 | B+ | 8.5 | 8 | 7 | |||
| 36 | The A B Chrysalis | 5 | A- | 9 | 8.5 | 9 | |||
| 37 | Seed Of Destruction | 4 | B+ | 9 | 8 | 9 | |||
| 38 | The Beta Cloud | 2 | C- | 6 | 4 | 9 | |||
| 39 | A Matter Of Balance | D- | 6.5 | 6 | 6 | ||||
| 40 | Space Warp | 4 | D | 6.5 | 5.5 | 8 | |||
| 41 | The Bringers Of Wonder | 6 | A | 4 | 7 | 7.5 | 10 | ||
| 43 | The Lambda Factor | 5 | A- | 9 | 8 | 10 | |||
| 44 | The Seance Spectre | B- | 9 | 8.5 | 8 | ||||
| 45 | Dorzak | A- | 8.5 | 7 | 9 | ||||
| 46 | Devil's Planet | B+ | 8 | 7 | 7 | ||||
| 47 | The Immunity Syndrome | 7 | B | 9.5 | 9 | 10 | |||
| 48 | The Dorcons | 5 | B+ | 9 | 8 | 9 |