- Michael Redgrave
- David Charleston
- Barbara Mullen
- Ellen Kirby
- James Mason
- Streeter
- Lilli Palmer
- Melanie Kurtz
- Finlay Currie
- Captain Joshua Stuart
- Frederick Valk
- Dr. Stefan Kurtz
- Sybille Binder
- Anne Marie Kurtz
- Frederick Cooper
- Ted Briggs
- Jean Shepeard
- Millie Briggs
- Barry Morse
- Robert
- George Carney
- Harry
- Miles Malleson
- Chairman of Directors
- Bryan Herbert
- Flanning
- James Pirrie
- Jim - The New Pilot
- A.E. Matthews
- Mr. Kirby
- Olive Sloane
- Woman Director
- Tommy Duggan
- Office Clerk
- Tony Quinn
- Office Clerk
- Harold Anstruther
- British Consul
- Alfred Sangster
- Director
- Victor Beaumont
- Hans Harma
- Joseph Goebbels
- Self
- Gerard Heinz
- Dr. Hartmann
- Adolf Hitler
- Self
- Michael Hunt
- boy Briggs
- Vi Kaley
- Old Woman In Cell
- David Keir
- 1st Magistrate
- Cyril Kent
- Journalist Observing Nazi Rally
- Guy Le Feuvre
- Minor Role
- Andreas Malandrinos
- Italian Police Chief
- Arnold Marlé
- President of the Medical Society
- Jack May
- Member of Angry Mob
- Bernard Rebel
- Italian Passenger
- Victor Rietti
- Doctor
- Raymond Rollett
- 1st Judge
- Bill Rooney
- Theatre Patron
- George Spence
- Man Asleep in Theatre
- Milo Sperber
- Mr. Hirohiti
- David Wallbridge
- Boy
