 |
Herbert Lom as Maurice Meister |
 |
Donald Wolfit as Dr. Lomond |
 |
Mai Zetterling as Lisa |
 |
Greta Gynt as Cora Ann Milton |
 |
William Hartnell as Sam Hackett |
 |
Norman Wooland as Inspector Bliss |
 |
Denholm Elliott as John Lemley |
 |
Walter Fitzgerald as Commissioner |
 |
Dora Bryan as Mrs. Hackett |
 |
Campbell Singer as Station Sergeant Carter |
 |
Charles Victor as Inspector Wembury |
 |
John Stuart as Gardener |
 |
John Slater as Bell |
 |
Edward Chapman as Stranger |
| Directing | Guy Hamilton | Director |
| Writing | Edgar Wallace | Theatre Play |
| Writing | Val Valentine | Screenplay |
| Editing | Bert Bates | Editor |
| Camera | Edward Scaife | Director of Photography |
| Sound | Malcolm Arnold | Original Music Composer |
| Sound | Ken Ritchie | Boom Operator |
| Costume & Make-Up | Eileen Bates | Hairdresser |
| Camera | Robert Day | Camera Operator |
| Camera | Gerry Fisher | Assistant Camera |
| Sound | Muir Mathieson | Music Director |
| Crew | Lesley Storm | Additional Dialogue |
| Camera | John Wilcox | Additional Photography |
| Production | Hugh Perceval | Associate Producer |
| Art | Joseph Bato | Set Designer |
| Art | William Hutchinson | Set Designer |
| Directing | Pamela Davies | Continuity |
| Production | Jack Swinburne | Production Manager |
| Sound | John Cox | Sound Supervisor |
| Sound | Buster Ambler | Sound Recordist |
| Sound | Red Law | Sound Recordist |
| Costume & Make-Up | George Partleton | Makeup Artist |
| Costume & Make-Up | Ivy Baker | Wardrobe Supervisor |
