Trailer
 | Patrick Holt as Inspector Gregory |
 | Emrys Jones as Howard Rogers |
 | Honor Blackman as Ann Rogers |
 | Bruce Beeby as Det. Sgt Conway |
 | John Horsley as Mr. Fisher |
| Robert Perceval as Bank Manager |
 | Wally Patch as Barman |
| Frank Pettitt as Fred (as Frank Pettit) |
| Benedicta Leigh as Policewoman Scott |
 | Peter Glaze as Station Booking Clerk |
| Vi Stevens as Landlady |
| Howard Greene as River Police Sergeant |
| Raymond Smith as River Police Constable |
| Lawrence James as Uniformed Constable |
| Reginald Hearne as Doctor (as Reggie Hearne) |
 | Barry Linehan as Forensic Chemist |
 | Gerry Duggan as Norman Cole |
| Colin Rix as Plain Clothes Detective |
| Bill Mills as Photographer |
| Pat Shaw as Uniformed Policewoman |
| John Tatham as PC Barrow (uncredited) |
| Writing | |
| Valerie Abraham | Story |
Production | |
| Ronald Liles | Associate Producer |
Editing | |
| Allan Morrison | Editor |
| Wally Nelson | Assistant Editor |
Camera | |
| Gus Drisse | Camera Operator |
Writing | |
| Reginald Hearne | Screenplay |
| Edward Abraham | Screenplay |
Production | |
| John I. Phillips | Producer |
Costume & Make-Up | |
| Jimmy Evans | Makeup Artist |
| Joyce Stoneman | Wardrobe Assistant |
| Bobbie Smith | Hairstylist |
Directing | |
| James Northcote | Second Assistant Director |
Writing | |
| Edward Abraham | Story |
Sound | |
| Richard Bird | Sound Recordist |
Camera | |
| Stephen Dade | Director of Photography |
Art | |
| Peter Childs | Assistant Art Director |
Camera | |
| Frank Bellingham | Still Photographer |
Sound | |
| Johnny Gregory | Music |
| Johnny Gregory | Music Director |
Art | |
| George Provis | Art Direction |
Directing | |
| David Bracknell | Assistant Director |
| Peter Maxwell | Director |
Sound | |
| Ken Ritchie | Boom Operator |
Directing | |
| Pat Moon | Continuity |
