Trailer
Images
 | Terence Morgan as Inspector Ralph Brown |
 | Yolande Donlan as Jill Wilson |
 | Anthony Oliver as Inspector Newcombe |
 | André Morell as Robert Isaac Pitt |
 | Reginald Beckwith as Harold |
| Ursula Howells as Antonia Pitt |
 | Guido Lorraine as Pietr Revski |
 | Basil Dignam as Wing Commander Riddle |
| Raymond Rollett as Sir Robert Rosper |
 | Fred Johnson as Professor Robinson-Heston |
 | Arnold Marlé as Karl Kopek |
 | Mark Dignam as Prison Governor |
 | John Horsley as Assistant Commissioner |
| Barry Lowe as Eric Colter |
| Diana Lambert as Young Woman |
| Petra Davies as Pitt's Maid (uncredited) |
| Brown Derby as Police Sergeant (uncredited) |
| Michael Godfrey as Chertwell Security Guard (uncredited) |
| Arthur Lovegrove as Nick (uncredited) |
| Louis Matto as Waiter (uncredited) |
| Guy Mills as Brown's Driver (uncredited) |
| Stuart Mitchell as Head Waiter (uncredited) |
 | Jim Brady as Nick's Thug (uncredited) |
| Cyril Renison as Detective Sergeant Enders (uncredited) |
| Writing | |
| Leonard Mosley | Novel |
| Val Guest | Screenplay |
| Val Valentine | Screenplay |
Directing | |
| Val Guest | Director |
Camera | |
| Bernard Lewis | Camera Operator |
