cast
- Hardy Kruger
- Jan Van Rooyen
- Stanley Baker
- Inspector Morgan
- Micheline Presle
- Jacqueline Cousteau
- Robert Flemyng
- Sir Brian Lewis
- Gordon Jackson
- Police Sergeant
- John Van Eyssen
- Westover
- Jack MacGowran
- Postman
- George Roubicek
- Police Constable
- Redmond Phillips
- Police Doctor
- Lee Montague
- Sgt. Farrow
- Christina Lubicz
- The Real Jacqueline Cousteau
crew
- Joseph Losey
- Director
- David Deutsch
- Producer
- Ben Barzman
- Screenwriter
- Leigh Howard
- Book Author
- Millard Lampell
- Screenwriter
- Charles Challis
- Cinematographer
- Christopher G. Challis
- Cinematographer
- Malcolm Arnold
- Musical Direction/Supervision
- Richard Rodney Bennett
- Composer (Music Score)
- Reginald Mills
- Editor
- Richard Macdonald
- Production Designer
- Edward Carrick
- Art Director
- Harry Pottle
- Art Director
- Morris Angel
- Costume Designer
- Rene Dupont
- First Assistant Director
- John Harris
- Camera Operator
- George Mills
- Production Manager
- Trevor Crole-Rees
- Makeup
