| Person | Type | Job | Role(s) |
|---|---|---|---|
 André Thomas | Crew | Camera | Director of Photography |
Christopher Massie | Crew | Writing | Novel |
Douglas Myers | Crew | Editing | Editor |
 Edana Romney | Crew | Writing | Screenplay |
 Georges Auric | Crew | Sound | Original Music Composer |
Gerry Fairbank | Crew | Costume & Make-Up | Makeup Supervisor |
Nicolas Wilcke | Crew | Crew | Special Effects |
 Rudolph Cartier | Crew | Production | Producer, Screenplay |
Serge Piménoff | Crew | Art | Production Design |
Terence Verity | Crew | Art | Art Direction |
 Terence Young | Crew | Directing | Director |
 Maggy Rouff | Crew | Costume & Make-Up | Seamstress |
J.S. Davie | Crew | Sound | Sound Recordist |
Ann Besserman | Crew | Directing | Continuity |
Walter Limot | Crew | Camera | Still Photographer |
Owen Hyde-Clark | Crew | Costume & Make-Up | Costume Design |
Mancini | Crew | Costume & Make-Up | Hair Supervisor |
Sam Lee | Crew | Production | Production Manager |
 Alan Wheatley | Cast | Actor | Edgar Orsen |
 Barbara Mullen | Cast | Actress | Veronica |
 Bruce Belfrage | Cast | Actor | Sir David Conway |
 Christopher Lee | Cast | Actor | Charles |
Edana Romney | Cast | Actress | Mifanwy |
 Eric Portman | Cast | Actor | Paul Mangin |
 Gordon McLeod | Cast | Public Prosecutor (uncredited) | |
 Hugh Latimer | Cast | Actor | Bing |
 Hugh Sinclair | Cast | Actor | Owen Rhys |
 Joan Maude | Cast | Actress | Caroline Hart |
 John Penrose | Cast | Actor | Brandy |
Leslie Weston | Cast | Actor | Mortimer |
 Lois Maxwell | Cast | Actress | Lois |
 Mavis Villiers | Cast | Actress | Babs |
 Noel Howlett | Cast | Actor | Psychiatrist (uncredited) |
 Susanne Gibbs | Cast | Actress | Gwendoline (uncredited) |
 Thora Hird | Cast | Actress | Visitor in Tussauds |
 Valentine Dyall | Cast | Actor | Counsel for the Defence (uncredited) |
| Person | Type | Job | Role(s) |
