 | Alex Nicol als Mark Kendrick |
 | Hillary Brooke als Carol Forrest |
 | Sid James als Beverly Forrest (as Sidney James) |
 | Susan Stephen als Andrea Forrest |
 | Paul Carpenter als Vincent Gordon |
 | Alan Wheatley als Inspector MacLennan |
 | Peter Illing als Harry Stevens |
 | Gordon McLeod als Doctor Emery |
 | Joan Hickson als Mrs. Hardcastle |
 | John Sharp als Mr. Hardcastle |
 | Hugh Dempster als Frank |
| Monti DeLyle als Head Waiter |
| Ken Hughes | Director |
| Ken Hughes | Novel |
| Ivor Slaney | Original Music Composer |
| Walter J. Harvey | Director of Photography |
| Anthony Hinds | Producer |
| James Needs | Editor |
| Ken Hughes | Screenplay |
| J. Elder Wills | Art Direction |
| Bill Salter | Sound Recordist |
| Len Harris | Camera Operator |
| Jimmy Sangster | Assistant Director |
| John 'Pinky' Green | Production Manager |
| Renée Glynne | Continuity |
| Phil Leaky | Makeup Artist |
| Nina Broe | Hairdresser |
| Robert L. Lippert | Presenter |
