- Unknown:
- A. A. Kennington
- Produced By:
- William Hughes
- Dilys:
- Rosamund Greenwood
- The Girl:
- Virginia Winter
- Mrs Westoby:
- Nan Marriott-Watson
- Larry Tremaine:
- Patrick Troughton
- Inspector Simonds:
- Tony Quinn
- Jet:
- Thelma Hughes
- Colonel Ranger:
- Allan Jeayes
- Doctor Meredith Ranger:
- John Cazabon