- Script Editor: Terrance Dicks;
- Writer: Robert Holmes;
- Produced by: Derrick Sherwin;
- Director: Derek Martinus;
- Designer: Paul Allen;
- Incidental Music: Dudley Simpson;
- Brigadier Lethbridge-Stewart: Nicholas Courtney;
- Liz Shaw: Caroline John;
| Channel | Episode | Title | Date | Viewers | Position |
| BBC 1 |
254 |
Episode One |
Sat 3 Jan 1970 |
317:15 - 17:40 |
8.4M |
54th |
| BBC 1 |
255 |
Episode Two |
Sat 10 Jan 1970 |
1017:15 - 17:40 |
8.1M |
57th |
| BBC 1 |
256 |
Episode Three |
Sat 17 Jan 1970 |
1717:15 - 17:40 |
8.3M |
49th |
| BBC 1 |
257 |
Episode Four |
Sat 24 Jan 1970 |
2417:15 - 17:40 |
8.1M |
51st |
- Madame Tussauds, London;
- King's Cross Station, London;
- BBC Training Centre, Wood Norton;
- Guinness Factory, Acton;
This programme has not been filmed in a studio or the studios are not known
|