| Person | Type | Job | Role(s) |
|---|---|---|---|
 Arthur Alcott | Crew | Crew | Production Controller |
Douglas Peirce | Crew | Production | Production Manager |
 Earl St. John | Crew | Production | Executive Producer |
George Provis | Crew | Art | Art Direction |
 Gerald Thomas | Crew | Editing | Editor |
Gordon K. McCallum | Crew | Sound | Sound Mixer |
 John Alcott | Crew | Camera | Clapper Loader |
Maurizio Lodi-Fè | Crew | Production | Location Manager |
Muir Mathieson | Crew | Sound | Conductor |
 Nino Rota | Crew | Sound | Original Music Composer |
Peter Boita | Crew | Editing | First Assistant Editor |
Peter Seabourne | Crew | Sound | Sound Editor |
 Ralph Thomas | Crew | Directing | Director |
Reginald H. Morris | Crew | Camera | Focus Puller |
Robert Cartwright | Crew | Art | Draughtsman |
Roy Walker | Crew | Art | Draughtsman |
Stella Rivers | Crew | Costume & Make-Up | Hairstylist |
Victor Canning | Crew | Writing | Novel, Screenplay |
Yvonne Caffin | Crew | Costume & Make-Up | Costume Design, Costume Supervisor |
 Betty E. Box | Crew | Production | Producer |
Ernest Steward | Crew | Crew | Cinematography, Director of Photography |
Ernest Gasser | Crew | Costume & Make-Up | Makeup Artist |
John Dennis | Crew | Sound | Sound Recordist |
Peter Bolton | Crew | Directing | Assistant Director |
Tilly Day | Crew | Directing | Continuity |
H. A. R. Thomson | Crew | Camera | Camera Operator |
Jack N. Green | Crew | Directing | Third Assistant Director |
Cornel Lucas | Crew | Camera | Still Photographer |
Fanya Fisher | Crew | Production | Production Secretary |
Roy Dorman | Crew | Art | Draughtsman |
Jim Ware | Crew | Directing | Second Assistant Director |
Iris Newell | Crew | Art | Assistant Art Director |
John Gow | Crew | Art | Draughtsman |
Charles Squires | Crew | Sound | Assistant Sound Editor |
 David Hurst | Cast | Actor | Minelli |
 Eileen Way | Cast | Actress | Woman Detective |
 Eric Pohlmann | Cast | Actor | Gostini |
 Eva Bartok | Cast | Actress | Adriana Medova |
 Ferdy Mayne | Cast | Actor | Tio |
 George Coulouris | Cast | Actor | Chief of Police Spadoni |
 John Bailey | Cast | Actor | Lieutenant Longo |
 John Gregson | Cast | Actor | Renzo Uccello |
 Margot Grahame | Cast | Actress | Rosa Melitus |
 Martin Boddey | Cast | Actor | Gufo |
 Meier Tzelniker | Cast | Actor | Mayor of Mirave |
 Michael Balfour | Cast | Actor | Moretto |
 Miles Malleson | Cast | Actor | Grespi |
 Raymond Young | Cast | Actor | Luigi |
 Richard Todd | Cast | Actor | Edward Mercer |
 Sid James | Cast | Actor | Bernardo |
 Sydney Tafler | Cast | Actor | Boldesca |
 Walter Rilla | Cast | Actor | Count Boria |
Betty E. Box | Cast | Woman Next to the Factory Tour Guide (Uncredited) | |
 Victor Harrington | Cast | Actor | Bystander (Uncredited) |
 Jill Clifford | Cast | Actress | Renata |
Toni Lucarda | Cast | Nerva | |
Janice Kane | Cast | Ninetta | |
| Person | Type | Job | Role(s) |
