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The
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| John | .... | Nicholas Young | |
| Voice of TIM | .... | Philip Gilbert | |
| Steven | .... | Peter Vaughan-Clarke | |
| Carol | .... | Sammie Winmill | |
| Kenny | .... | Stephen Salmon | |
| Ginge | .... | Michael Standing | |
| Lefty | .... | Derek Crewe | |
| Elizabeth | .... | Elizabeth Adare | |
| Prof Cawston | .... | Brian Stanion | |
| Chris | .... | Christopher Chittell | |
| Tyso | .... | Dean Lawrence | |
| Mike Bell | .... | Mike Holoway | |
| Hsui Tai | .... | Misako Koba | |
| Andrew Forbes | .... | Nigel Rhodes |
| Roger Price |
| Dudley Simpson |
| (See Episode List) |
| (See Episode List) |
| Ruth Boswell | (1973 - 1975) | ||
| Roger Price | (1973 & 1976) | ||
| Vic Hughes | (1977 - 1979) |

| Prog. | Episode Title | Written by | Directed by | First Broadcast | |
|---|---|---|---|---|---|
| Series 1 | 1 | The Slaves of Jedikiah ep.1: Untitled | Brian Finch & Roger Price | Paul Bernard | 30 April 1973 |
| 2 | The Slaves of Jedikiah ep.2: Untitled | Brian Finch & Roger Price | Paul Bernard | 7 May 1973 | |
| 3 | The Slaves of Jedikiah ep.3: Untitled | Brian Finch & Roger Price | Paul Bernard | 14 May 1973 | |
| 4 | The Slaves of Jedikiah ep.4: Untitled | Brian Finch & Roger Price | Paul Bernard | 21 May 1973 | |
| 5 | The Slaves of Jedikiah ep.5: Untitled | Brian Finch & Roger Price | Paul Bernard | 4 June 1973 | |
| 6 | The Medusa Strain ep.1: Untitled | Brian Finch & Roger Price | Roger Price | 11 June 1973 | |
| 7 | The Medusa Strain ep.2: Untitled | Brian Finch & Roger Price | Roger Price | 18 June 1973 | |
| 8 | The Medusa Strain ep.3: Untitled | Brian Finch & Roger Price | Roger Price | 25 June 1973 | |
| 9 | The Medusa Strain ep.4: Untitled | Brian Finch & Roger Price | Roger Price | 2 July 1973 | |
| 10 | The Vanishing Earth ep.1: Untitled | Brian Finch & Roger Price | Paul Bernard | 9 July 1973 | |
| 11 | The Vanishing Earth ep.2: Untitled | Brian Finch & Roger Price | Paul Bernard | 16 July 1973 | |
| 12 | The Vanishing Earth ep.3: Untitled | Brian Finch & Roger Price | Paul Bernard | 23 July 1973 | |
| 13 | The Vanishing Earth ep.4: Untitled | Brian Finch & Roger Price | Paul Bernard | 30 July 1973 | |
| Series 2 | 14 | The Blue and the Green ep.1: An Apple for the Teacher | Roger Price | Roger Price | 4 February 1974 |
| 15 | The Blue and the Green ep.2: The Changing Picture | Roger Price | Roger Price | 11 February 1974 | |
| 16 | The Blue and the Green ep.3: The Trojan Horse | Roger Price | Roger Price | 18 February 1974 | |
| 17 | The Blue and the Green ep.4: Cuckoo in the Nest | Roger Price | Roger Price | 25 February 1974 | |
| 18 | The Blue and the Green ep.5: The Swarming Season | Roger Price | Roger Price | 4 March 1974 | |
| 19 | A Rift in Time ep.1: Vase of Mystery | Roger Price | Roger Price | 11 March 1974 | |
| 20 | A Rift in Time ep.2: Turn of the Thumb | Roger Price | Roger Price | 18 March 1974 | |
| 21 | A Rift in Time ep.3: From Little Acorns | Roger Price | Roger Price | 25 March 1974 | |
| 22 | A Rift in Time ep.4: Rise of the Roman Empire | Roger Price | Roger Price | 1 April 1974 | |
| 23 | The Doomsday Men ep.1: Dressed to Kill | Roger Price | Roger Price | 8 April 1974 | |
| 24 | The Doomsday Men ep.2: The Burning Sword | Roger Price | Roger Price | 22 April 1974 | |
| 25 | The Doomsday Men ep.3: Run Rabbit Run | Roger Price | Roger Price | 29 April 1974 | |
| 26 | The Doomsday Men ep.4: The Shuttlecock | Roger Price | Roger Price | 6 May 1974 | |
| Series 3 | 27 | Secret Weapon ep.1: Lost and Found | Roger Price | Stan Woodward | 26 February 1975 |
| 28 | Secret Weapon ep.2: Not Quite a Sleeping Beauty | Roger Price | Stan Woodward | 5 March 1975 | |
| 29 | Secret Weapon ep.3: Whose Side Are You on Professor | Roger Price | Stan Woodward | 12 March 1975 | |
| 30 | Secret Weapon ep.4: A Present from Russia | Roger Price | Stan Woodward | 19 March 1975 | |
| 31 | Worlds Away ep.1: Secret of the Pyramid | Roger Price | Dennis Kirkland & Vic Hughes | 26 March 1975 | |
| 32 | Worlds Away ep.2: Hound of the Night | Roger Price | Dennis Kirkland & Vic Hughes | 2 April 1975 | |
| 33 | Worlds Away ep.3: More for the Burning | Roger Price | Dennis Kirkland & Vic Hughes | 9 April 1975 | |
| 34 | A Man for Emily ep.1: The Fastest Gun | Roger Price | Stan Woodward | 16 April 1975 | |
| 35 | A Man for Emily ep.2: Here We Go Round the Doozlum | Roger Price | Stan Woodward | 23 April 1975 | |
| 36 | A Man for Emily ep.3: A Man for Emily | Roger Price | Stan Woodward | 30 April 1975 | |
| 37 | The Revenge of Jedikiah ep.1: Curse of the Mummy's Tomb | Roger Price | Vic Hughes | 7 May 1975 | |
| 38 | The Revenge of Jedikiah ep.2: Last Chance | Roger Price | Vic Hughes | 14 May 1975 | |
| 39 | The Revenge of Jedikiah ep.3: Farewell Performance | Roger Price | Vic Hughes | 21 May 1975 | |
| Series 4 | 40 | One Law ep.1: One Law for the Poor | Roger Price | Leon Thau | 28 January 1976 |
| 41 | One Law ep.2: Another for the Rich | Roger Price | Leon Thau | 4 February 1976 | |
| 42 | One Law ep.3: Which Prohibits Them Equally from Stealing Bread | Roger Price | Leon Thau | 11 February 1976 | |
| 43 | Into the Unknown ep.1: The Visitor | Jon Watkins | Roger Price | 18 February 1976 | |
| 44 | Into the Unknown ep.2: The Father Ship | Jon Watkins | Roger Price | 25 February 1976 | |
| 45 | Into the Unknown ep.3: The Tunnel | Jon Watkins | Roger Price | 3 March 1976 | |
| 46 | Into the Unknown ep.4: The Circle | Jon Watkins | Roger Price | 10 March 1976 | |
| Series 5 | 47 | The Dirtiest Business ep.1: A Spy is Born | Roger Price | Vic Hughes | 28 February 1977 |
| 48 | The Dirtiest Business ep.2: A Spy Dies | Roger Price | Vic Hughes | 7 March 1977 | |
| 49 | A Much Needed Holiday ep.1: Spilled Porridge | Roger Price | Richard Mervyn | 14 March 1977 | |
| 50 | A Much Needed Holiday ep.2: Just Desserts | Roger Price | Richard Mervyn | 21 March 1977 | |
| 51 | The Heart of Sogguth ep.1: Beat the Drum | Roger Price | Vic Hughes | 28 March 1977 | |
| 52 | The Heart of Sogguth ep.2: Devil in Disguise | Roger Price | Vic Hughes | 4 April 1977 | |
| Series 6 | 53 | The Lost Gods ep.1: Flight of Fancy | Roger Price | Peter Webb | 15 May 1978 |
| 54 | The Lost Gods ep.2: Life Before Death | Roger Price | Peter Webb | 22 May 1978 | |
| 55 | Hitler's Last Secret ep.1: Men Like Rats | Roger Price | Leon Thau | 5 June 1978 | |
| 56 | Hitler's Last Secret ep.2: Seeds of Destruction | Roger Price | Leon Thau | 12 June 1978 | |
| 57 | The Thargon Menace ep.1: Unexpected Guests | Roger Price | Peter Yolland | 19 June 1978 | |
| 58 | The Thargon Menace ep.2: Playing With Fire | Roger Price | Peter Yolland | 26 June 1978 | |
| Series 7 | 59 | Castle of Fear ep.1: Ghosts and Monsters | Roger Price | Vic Hughes | 9 October 1978 |
| 60 | Castle of Fear ep.2: Fighting Spirit | Roger Price | Vic Hughes | 16 October 1978 | |
| 61 | Achilles Heel ep.1: A Room at the Inn | Roger Price | Gabrielle Beaumont | 23 October 1978 | |
| 62 | Achilles Heel ep.2: Everything to Lose | Roger Price | Gabrielle Beaumont | 30 October 1978 | |
| 63 | Living Skins ep.1: A Harmless Fashion | Roger Price | Stan Woodward | 6 November 1978 | |
| 64 | Living Skins ep.2: Cold War | Roger Price | Stan Woodward | 13 November 1978 | |
| Series 8 | 65 | War of the Empires ep.1: Close Encounter | Roger Price | Vic Hughes | 29 January 1979 |
| 66 | War of the Empires ep.2: Contact | Roger Price | Vic Hughes | 5 February 1979 | |
| 67 | War of the Empires ep.3: Standing Alone | Roger Price | Vic Hughes | 5 February 1979 | |
| 68 | War of the Empires ep.4: All in the Mind | Roger Price | Vic Hughes | 5 February 1979 | |