 | Jane Hylton als Diana Taylor |
 | Duncan Lamont als Jack Taylor |
 | Donald Gray als Jimmy Thompson |
 | Meredith Edwards als Bob Edwards |
 | Cyril Smith als Alf Quinney |
 | Irene Handl als Mrs. Raymond |
 | Hugo Schuster als Hartl |
 | Kynaston Reeves als Pathologist |
| Hugh Moxey als Assistant Commissioner |
| Tony Hilton als Tubby |
| Stanley Vilven als Attwood |
| Hamilton Keene als Fire Officer (as Hamilton Keane) |
| Gwen Bacon als Mrs. Thompson |
| Charlie Bird als Police Sergeant (uncredited) |
 | Stratford Johns als 2nd Fireman (uncredited) |
| Arthur Lovegrove als 1st Fireman (uncredited) |
| Jack May als Man Being Interviewed by Detective (uncredited) |
| Jack Taylor als Detective Sergeant Dutton (uncredited) |
| John H. Watson als Police Constable (uncredited) |
 | Neil Wilson als Landlord (uncredited) |
| Daniel Birt | Director |
| Ted Willis | Screenplay |
| Percy Hoskins | Story |
| Bill Lewthwaite | Editor |
| Ronald Kinnoch | Producer |
| Ray Simm | Art Direction |
| George Frost | Makeup Artist |
| June Robinson | Hairdresser |
| E.A. Joseph | Production Manager |
| Robert Lynn | Assistant Director |
| Bert Pearl | Second Assistant Director |
| John Pitcher | Third Assistant Director |
| Harry Pottle | Draughtsman |
| George Fisher | Sound Editor |
| Len Page | Sound Recordist |
| Charles Wheeler | Boom Operator |
| Arthur Graham | Camera Operator |
| Freddie Cooper | Focus Puller |
| Amy Binney | Wardrobe Master |
| Peter R. Hunt | Assistant Editor |
| Doris Martin | Continuity |
