Legend has it that if the famous Barbary Apes leave the Rock of Gibraltar, it's a sign that the British will lose control of it. During World War II, a British officer is put in charge of the apes. When he detects that the animals' morale is slipping, he hatches a plan to go behind the German lines to "kidnap" a new ape for his charges to lift their spirits before the Germans find out about their condition and use it as propaganda.
| Directing | Robert Day | Director |
| Writing | Alan Hackney | Writer |
| Writing | Len Heath | Writer |
| Writing | Paul Mills | Story |
| Writing | John Warren | Writer |
| Production | Jules Buck | Producer |
| Production | Peter O'Toole | Producer |
| Production | Roy Simpson | Associate Producer |
| Camera | Geoffrey Faithfull | Director of Photography |
| Editing | Bert Rule | Editor |
| Sound | Ken Jones | Original Music Composer |
| Art | Ivan King | Art Direction |
| Directing | Ross MacKenzie | Assistant Director |
| Sound | Norman Coggs | Sound Recordist |
| Sound | Len Shilton | Sound Recordist |
| Crew | Harold Geller | Additional Music |
| Camera | Mike Roberts | Focus Puller |
