Bette Davis
— Madame Sin
Robert Wagner
— Anthony Lawrence
Denholm Elliott
— Malcolm De Vere
Gordon Jackson
— Commander Cavendish
Dudley Sutton
— Monk
Catherine Schell
— Barbara
Paul Maxwell
— Connors
David Healy
— Braden
Alan Dobie
— White
Al Mancini
— Fisherman
Paul Young
— Naval Driver
Roy Kinnear
— Holidaymaker
Charles Lloyd Pack
— Mr. Willoughby
Burt Kwouk
— Scarred Operator