| Jon Pertwee | ... | Dr. Who | |
| Patrick Troughton | ... | Dr. Who | |
| William Hartnell | ... | Dr. Who | |
| Katy Manning | ... | Jo Grant | |
| Nicholas Courtney | ... | Brigadier Lethbridge Stewart | |
| John Levene | ... | Sergeant Benton | |
| Rex Robinson | ... | Dr. Tyler | |
| Roy Purcell | ... | President of the Council | |
| Graham Leaman | ... | Time Lord | |
| Stephen Thorne | ... | Omega | |
| Laurie Webb | ... | Mr. Ollis | |
| Patricia Prior | ... | Mrs. Ollis |
| Episode Crew |
Directed by | |||
| Lennie Mayne | |||
Writing credits | ||
| Bob Baker | (written by) & | |
| Dave Martin | (written by) | |
Produced by | |||
| Barry Letts | .... | producer | |
Film Editing by | |||
| Jim Walker | |||
Production Design by | |||
| Roger Liminton | |||
Costume Design by | |||
| James Acheson | |||
Makeup Department | |||
| Anne Rayment | .... | makeup artist (as Ann Rayment) | |
Sound Department | |||
| Derek Miller-Timmins | .... | sound | |
| Dick Mills | .... | special sound | |
| Bob Roberts | .... | sound: film | |
Visual Effects by | |||
| Michael John Harris | .... | visual effects designer (as Michealjohn Harris) | |
Camera and Electrical Department | |||
| John Baker | .... | film camera | |
| Clive Thomas | .... | lighting technician | |
Music Department | |||
| Ron Grainer | .... | composer: title music | |
| Dudley Simpson | .... | composer: incidental music | |
Other crew | |||
| Terrance Dicks | .... | script editor | |
| Main series | Episode guide | Full cast and crew |
| Company credits | IMDb TV section | IMDb Adventure section |
| IMDb UK section | Add this title to MyMovies |