- Script Editor: Terrance Dicks;
- Writers: Bob Baker and Dave Martin;
- Produced by: Barry Letts;
- Director: Michael Ferguson;
- Designer: Kenneth Sharp;
- Incidental Music: Dudley Simpson;
- Action: Havoc;
- Brigadier Lethbridge-Stewart: Nicholas Courtney;
- Sergeant Benton: John Levene;
- Jo Grant: Katy Manning;
- Captain Yates: Richard Franklin;
| Channel | Episode | Title | Date | Viewers | Position |
| BBC 1 |
289 |
Episode One |
Sat 13 Mar 1971 |
1317:15 - 17:40 |
7.3M |
57th |
| BBC 1 |
290 |
Episode Two |
Sat 20 Mar 1971 |
2017:15 - 17:40 |
8.0M |
43rd |
| BBC 1 |
291 |
Episode Three |
Sat 27 Mar 1971 |
2717:15 - 17:40 |
6.4M |
70th |
| BBC 1 |
292 |
Episode Four |
Sat 3 Apr 1971 |
317:15 - 17:40 |
7.8M |
49th |
This programme has not been repeated.
- Dungeness Power Station, Kent;
- Dungeness Beach, Kent;
- Television Centre Studio 3;
- Television Centre Studio 4;
This programme has not working titles
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