| Person | Type | Job | Role(s) |
|---|---|---|---|
 Adrian Pryce-Jones | Crew | Directing | Assistant Director |
 Anthony Bushell | Crew | Directing | Director, Producer |
Benjamin Frankel | Crew | Sound | Original Music Composer |
 Edgar Lustgarten | Crew | Writing | Novel |
George Paterson | Crew | Art | Art Direction |
Huntington Hartford | Crew | Production | Producer |
Iris Tilley | Crew | Costume & Make-Up | Hairdresser |
 John Glen | Crew | Editing | Assistant Editor |
John O'Gorman | Crew | Costume & Make-Up | Makeup Artist |
 Nunnally Johnson | Crew | Writing | Screenplay |
Peter Price | Crew | Directing | Third Assistant Director |
Reginald Beck | Crew | Directing | Director |
 Rex Harrison | Crew | Production | Associate Producer |
Ronald Kinnoch | Crew | Production | Associate Producer |
Tom Simpson | Crew | Editing | Editor |
Wilkie Cooper | Crew | Camera | Director of Photography |
W.E. Fairchild | Crew | Crew | Additional Dialogue |
Fred Turtle | Crew | Sound | Sound Mixer |
Betty Forster | Crew | Directing | Continuity |
Eric Besche | Crew | Camera | Camera Operator |
Elizabeth Hennings | Crew | Costume & Make-Up | Costume Design |
Kitty Spreckley | Crew | Sound | Sound Editor |
Peter Cusick | Crew | Production | Producer |
Pat Wallace | Crew | Directing | Script Supervisor |
Anthony Bushell | Cast | Actor | Clive Bedford |
 Anthony Dawson | Cast | Actor | The Man |
 Ballard Berkeley | Cast | Actor | Supt. Maxey |
 Brenda De Banzie | Cast | Actress | Mrs Rogers |
 Colin Gordon | Cast | Actor | Pound |
 Denis O'Dea | Cast | Actor | Sir Charles Morton |
Dora Sevening | Cast | Mary's mother | |
 Eric Pohlmann | Cast | Actor | Mr Polaris |
Frank Tickle | Cast | Actor | Alfred Tripp |
Henrietta Barry | Cast | Actress | Rosemary Groome |
Henry B. Longhurst | Cast | Actor | Judge |
 Jenny Laird | Cast | Actress | Mrs Sims |
 Jill Bennett | Cast | Actress | 1st Murdered Girl |
Lilli Molnar | Cast | Mrs Polaris | |
 Lilli Palmer | Cast | Actress | Mary Groome |
Meriel Forbes | Cast | Actress | Marjorie Danns |
 Michael Medwin | Cast | Actor | Leslie Scott |
 Patricia Cutts | Cast | Actress | Rose Mallory |
 Raymond Huntley | Cast | Actor | Chief Inspector Sullivan |
Rex Harrison | Cast | Actor | Arthur Groome |
Ronald Simpson | Cast | Actor | Mary's father |
Tania Heald | Cast | Sheila Groome | |
Tom Macaulay | Cast | Actor | Ironworks Manager |
 William Squire | Cast | Actor | Sergeant Cochcran |
 Lionel Murton | Cast | Actor | Jefferson |
Douglas Jefferies | Cast | Dr Conway | |
Richard Littledale | Cast | Mr. Sims | |
Tony Quinn | Cast | Actor | Joe |
Anthony Shaw | Cast | Clerk of the Court | |
Ernest Blyth | Cast | Court Clerk (uncredited) | |
Fletcher Lightfoot | Cast | Jury Foreman | |
| Person | Type | Job | Role(s) |
