 | Dennis Price als Inspector Peter Lawton |
 | Peggy Evans als Joan Lawton |
 | Rex Garner als Sgt. Bill Todd |
 | Philip Saville als Edward "Teddy" King / Jim King |
| Greta Mayaro als Lena |
| Arnold Bell als McMann |
| Leonard Sharp als Old Skip |
 | Nora Gordon als Nanna |
| Renee Goddard als Lady Branstead |
| Arthur Lovegrove als Inspector Cobb |
| Daphne Maddox als Victim |
| Robert Weeden als Constable |
| Eddie Boyce als Police Constable (uncredited) |
| John Davis als Transmitting Constable (uncredited) |
 | Victor Harrington als Jewel Box Nightclub Patron (uncredited) |
| Aileen Lewis als Jewel Box Nightclub Patron (uncredited) |
| John Ainsworth | Screenplay |
| Francis Searle | Director |
| Moie Charles | Additional Dialogue |
| Bill Oxley | Camera Operator |
| John Ainsworth | Producer |
| David Henley | Producer |
| Eric Spear | Original Music Composer |
| S.D. Onions | Director of Photography |
| Adam Dawson | Editor |
| George Paterson | Art Direction |
| Philip Leakey | Makeup Artist |
| John 'Pinky' Green | Production Manager |
| Douglas Hickox | Second Assistant Director |
| John Oldknow | Assistant Director |
| William Germain | Sound |
| Derick McColm | Sound |
| Don Wortham | Boom Operator |
| Anthony Busbridge | Clapper Loader |
| Ken Nicholson | Focus Puller |
| Kathleen Moore | Wardrobe Assistant |
| Terry Laurie | Assistant Editor |
| Eric Spear | Conductor |
| Gladys Reeve | Continuity |
