Penny Appleby
Susan Strasberg
Robert
Ronald Lewis
Plainclothes Sergeant (uncredited)
Frederick Rawlings
Richard Klee
Plainclothes Officer (uncredited)
Brian Jackson
Heinz Bernard
Frederick Schrecker
Policeman (uncredited)
Gordon Sterne
Rodney Burke
Jane Appleby
Ann Todd
Doctor Pierre Gerrard
Christopher Lee
Inspector Legrand
John Serret
Mr. Spratt
Leonard Sachs
Marie the Maid
Anne Blake
Father
Fred Johnson
Swiss Air Hostess (uncredited)
Madame Lobegue
Gendarme (uncredited)
Bernard Browne
Writer
Jimmy Sangster
Producer
Director
Seth Holt
Camera Operator
Desmond Davis
Director of Photography
Douglas Slocombe
Original Music Composer
Clifton Parker
Executive Producer
Michael Carreras
Editor
Eric Boyd-Perkins
Production Design
Bernard Robinson
Hairstylist
Eileen Bates
Casting
Stuart Lyons
Art Direction
Thomas Goswell
Sound Recordist
Len Shilton
Makeup Artist
Basil Newall
Assistant Art Director
Bill Constable
Special Effects Assistant
Ian Scoones
Underwater Camera
Egil S. Woxholt
Second Assistant Director
Terry Lens
Additional Camera
Len Harris
Continuity
Pamela Mann
John Jordan
Wardrobe Master
Dora Lloyd
Sound Editor
Jim Groom
Assistant Sound Editor
John Crome
Harry Oakes
Assistant Director
David Tomblin
Still Photographer
George Higgins
Supervising Editor
James Needs
Assistant Editor
Clapper Loader
Ray Andrew
Special Effects
Les Bowie
Production Manager
William Hill
Teddy Mason
Music Supervisor
John Hollingsworth
Les Hammond