- Eddie Albert
- Maj. MacMahon
- Paul Massie
- Gene Summers
- Lillian Gish
- Mrs. Summers
- James Robertson Justice
- Naval Commander
- Leslie French
- Lafitte
- Irene Worth
- Léonie
- John Crawford
- Kimball
- Lionel Jeffries
- Interrogator
- Nicholas Phipps
- Lecturer Lieutenant
- Sandra Dorne
- Blonde with German Officer
- Jacques B. Brunius
- Cmndt. Morand
- Robert Henderson
- Col. Snyder
- Miki Iveria
- Louise
- Lillie Bea Gifford
- Mauricette
- Anne Blake
- Mme. Lafitte
- Sam Kydd
- Flight Sgt. Flint
- Ann Walford
- F.A.N.Y.
- Denyse Alexander
- Pat
- Philip Bond
- Nils
- Selma Vaz Dias
- Patronne
- Ãdouard Francomme
- House Painter
- William E. Greene
- Mitchell
- Jim Gérald
- François
- Geoffrey Hibbert
- RAF Sergeant
- George Holdcroft
- Trainee Agent at Lecture
- Barry Johns
- Trainee Agent at Lecture
- Michael Kelly
- Pilot
- Peter La Trobe
- Louis
- Andreas Malandrinos
- (uncredited)
- Launce Maraschal
- Gen. Nolan
- Ralph Nossek
- Psychiatrist
- Henzie Raeburn
- Madame Godinot
- Boris Ranevsky
- Old German Officer
- Bernard Rebel
- Bearded Client
- Fritz Wendhausen
- German Officer
