André Morell
Robert Isaac Pitt
Terence Morgan
Inspector Ralph Brown
John Horsley
Assistant Commissioner
Fred Johnson
Professor Robinson-Heston
Reginald Beckwith
Harold
Mark Dignam
Prison Governor
Arnold Marlé
Karl Kopek
Basil Dignam
Wing Commander Riddle
Ursula Howells
Antonia Pitt
Yolande Donlan
Jill Wilson
Anthony Oliver
Inspector Newcombe
Michael Godfrey
Chertwell Security Guard (uncredited)
Guido Lorraine
Pietr Revski
Arthur Lovegrove
Nick (uncredited)
Brown Derby
Police Sergeant (uncredited)
Raymond Rollett
Sir Robert Rosper
Stuart Mitchell
Head Waiter (uncredited)
Jim Brady
Nick's Thug (uncredited)
Petra Davies
Pitt's Maid (uncredited)
Cyril Renison
Detective Sergeant Enders (uncredited)
Guy Mills
Brown's Driver (uncredited)
Louis Matto
Waiter (uncredited)