Bob Sharkey, an instructor of would-be spies for the Allied Office of Strategic Services, becomes suspicious of one of the latest batch of students, Bill O'Connell, who is too good at espionage. His boss, Charles Gibson confirms that O'Connell is really a top German agent, but tells Sharkey to pass him, as they intend to feed the mole false information about the impending D-Day invasion.
James Cagney
as Robert Emmett 'Bob' Sharkey
Annabella
as Suzanne de Beaumont
Richard Conte
as William H. 'Bill' O'Connell
Frank Latimore
as Jeff Lassiter
Walter Abel
as Charles Gibson
Melville Cooper
as Pappy Simpson
Sam Jaffe
as Mayor Galimard
Karl Malden
as Jump Master (uncredited)
Judith Lowry
as Peasant Woman (uncredited)
Reed Hadley
as Narrator (voice) (uncredited)
Dick Wessel
as Gestapo Officer (uncredited)
Dick Gordon
as Psychiatrist (scenes deleted)
