 | Laurence Payne als Norman Martell |
 | Patricia Dainton als Helen Martell |
 | Jane Griffiths als Peggy Hill |
 | Edward Underdown als Dr. Peter Murdoch |
 | John Arnatt als Supt. Ross |
 | Humphrey Lestocq als Simmons, the Producer |
 | Lucy Griffiths als Miss Potter |
 | Olive Milbourne als Mrs. Booth |
 | Arthur Hewlett als Marshall |
 | Annette Kerr als Cinema cashier |
| Cleo Laine als Cleo |
 | Dudley Moore als Rehearsal Pianist (Uncredited) |
| Sylvia Davis als Cinema sales girl (uncredited) |
 | Max Faulkner als Det. Sgt. Fred Smith (uncredited) |
| Garard Green als Patrol car policeman (uncredited) |
| Arthur Howell als P.C. Williams (uncredited) |
| Aileen Lewis als Sheila (Party Guest) (uncredited) |
| Richard Neller als Sleeping Man in Theater (uncredited) |
| Pat Ryan als Detective Examining Tape-Recorder (uncredited) |
| Stuart Saunders als Cinema manager (uncredited) |
| Arthur Skinner als Det. Sgt. Carter (uncredited) |
| John Tatham als Detective / Fingerprints Officer (uncredited) |
| Montgomery Tully | Director |
| Maurice J. Wilson | Screenplay |
| Montgomery Tully | Screenplay |
| Jane Baker | Theatre Play |
| Pip Baker | Theatre Play |
| Jim Connock | Editor |
| John Shinerock | Camera Operator |
| Pat Marsden | Production Manager |
| Walter J. Harvey | Director of Photography |
| Hilda Fox | Hairdresser |
| David Tringham | First Assistant Director |
| Dick Smith | Sound Recordist |
| Don Banks | Original Music Composer |
| William Hutchinson | Art Direction |
| Philip Martell | Music Director |
| Richard Mills | Makeup Artist |
| Estelle Stewart | Continuity |
| Maurice J. Wilson | Producer |
| Evelyn Gibbs | Wardrobe Master |
