| Person | Type | Job | Role(s) |
|---|---|---|---|
 Bernard Miles | Crew | Writing | Screenplay |
 Duncan Sutherland | Crew | Art | Art Direction |
Elliot Scott | Crew | Art | Assistant Art Director |
Hans May | Crew | Sound | Music |
Honoria Plesch | Crew | Costume & Make-Up | Costume Design |
 Jack Hildyard | Crew | Camera | Camera Operator |
Jeffrey Dell | Crew | Writing | Screenplay |
 John Boulting | Crew | Production | Producer |
Mutz Greenbaum | Crew | Camera | Director of Photography |
Robert Ardrey | Crew | Writing | Theatre Play |
 Roy Boulting | Crew | Directing | Director, Editor |
Tom Howard | Crew | Crew | Special Effects |
Frederick Ford | Crew | Crew | Special Effects |
John Cook | Crew | Crew | Sound Recordist |
Percy Dayton | Crew | Sound | Boom Operator |
Bill Herlihy | Crew | Directing | Third Assistant Director |
 A.E. Matthews | Cast | Actor | Mr. Kirby |
 Andreas Malandrinos | Cast | Actor | Italian Police Chief (uncredited) |
 Arnold Marlé | Cast | Actor | President of the Medical Society (uncredited) |
 Barbara Mullen | Cast | Actress | Ellen Kirby |
 Barry Morse | Cast | Actor | Robert |
Bernard Rebel | Cast | Actor | Italian Passenger (uncredited) |
 Bryan Herbert | Cast | Flanning | |
David Keir | Cast | Actor | 1st Magistrate (uncredited) |
 Finlay Currie | Cast | Actor | Capt. Joshua Stuart |
Frederick Cooper | Cast | Briggs | |
 Frederick Valk | Cast | Actor | Dr. Kurtz |
 George Carney | Cast | Actor | Harry |
 Gerard Heinz | Cast | Actor | Dr. Hartmann (uncredited) |
Harold Anstruther | Cast | British Consul | |
 James Mason | Cast | Actor | Streeter |
James Pirrie | Cast | Actor | New Pilot |
 Lilli Palmer | Cast | Actress | Melanie Kurtz |
 Michael Redgrave | Cast | Actor | David Charleston |
 Miles Malleson | Cast | Actor | Chairman of Directors |
 Milo Sperber | Cast | Actor | Mr. Hirohiti (uncredited) |
 Olive Sloane | Cast | Actress | Woman Director |
Raymond Rollett | Cast | Actor | 1st Judge (uncredited) |
 Sybille Binder | Cast | Actress | Anne Marie |
 Tommy Duggan | Cast | Actor | Office Clerk |
 Vi Kaley | Cast | Actress | Old Woman in Cell (uncredited) |
 Victor Rietti | Cast | Actor | Doctor (uncredited) |
Alfred Sangster | Cast | Director | |
Tony Quinn | Cast | Actor | Office Clerk |
Jean Shepeard | Cast | Mrs. Briggs | |
| Person | Type | Job | Role(s) |
