Hedy Lamarr as Madeleine Damien

Dennis O'Keefe as Dr. David Cousins

John Loder as Felix Courtland

William Lundigan as Jack Garet

Morris Carnovsky as Dr. Richard Caleb

Natalie Schafer as Ethel Royce

Paul Cavanagh as Victor Kranish

Douglass Dumbrille as District Attorney O'Brien

Margaret Hamilton as Mrs. Geiger

Nicholas Joy as Mitchell

Archie Twitchell as Freddie Francher

Gino Corrado as Carl, Waiter

Dewey Robinson as Jim, Doorman

Edward Biby as Clerk

Fred Kohler Jr. as First Motorcycle Cop

Henry Hebert as Attorney's Assistant

Raoul Freeman as Bailiff

Wilbur Mack as Judge

Reid Kilpatrick as AP News Broadcaster

Jack Richardson as Passerby

Kam Tong as Courtland's Houseboy

Jack Deery as Club Patron

Dick Gordon as Club Patron

Paul Power as Club Patron

Robert Haines as Courtroom Spectator

Curt Furburg as Courtroom Spectator

Russell Meeker as Courtroom Spectator

James Flavin as Police Sergeant Patella

Robert B. Williams as Police Sergeant Bartlett

Harry Strang as Police Sergeant

Ian Wolfe as Dr. E.G. Lutz