- George Sanders
- Carl Steelman / Ernst Reiter
- Anna Sten
- Frau Reiter
- Ward Bond
- FBI Chief Craig
- Dennis Hoey
- Col. Taeger
- Sig Ruman
- Dr. Herman Holger
- Ludwig Stössel
- Papa Julius Steelman
- Robert Barrat
- Capt. Kranz
- Liesl Handl
- Helga Lorenz
- Ralph Byrd
- Burkhardt
- Elsa Janssen
- Mama Henrietta Steelman
- Rex Williams
- Eichner
- Charles McGraw
- Zellerbach
- Sven Hugo Borg
- Cmdr. Ullrich Hauser
- Kurt Katch
- Schonzeit
- Otto Reichow
- Adam - S.S. Trooper
- André Charlot
- Zugholtz
- Arno Frey
- Kranz' Aide
- Sam Wren
- Jones
- Etta McDaniel
- Theresa - Steelmann's Maid
- Peter Michael
- Gertzer
- Dick Hogan
- Coast Guardsman
- Lisa Golm
- Stockings Saleslady
- Wolfgang Zilzer
- Schlegel
- John Banner
- Gestapo Agent
- Ruth Brady
- Secretary
- Egon Brecher
- Kirschner
- Frederic Brunn
- German Soldier
- Albert D'Arno
- German Soldier
- John Epper
- Dispatch Rider
- Frederick Giermann
- Gestapo Agent at Desk
- Henry Guttman
- Fiertag - at Bund Meeting
- Eula Guy
- Anne the Nurse
- Paul Kruger
- FBI Agent
- George Lynn
- Herman - Gestapo Driver
- John Merton
- Policeman in Bund Raid
- Torben Meyer
- Graumark Hotel Desk Clerk
- John Mylong
- German Officer
- Fred Nurney
- The Real Ernst Reiter
- Hugh Prosser
- FBI Agent
- Walter Sande
- Coast Guard Desk Chief
- Jack Shea
- FBI Agent Escorting Carl
- Arthur Space
- FBI Agent Arresting Rowboat Spy
- Walter O. Stahl
- Col. Taeger's Aide
- Robert R. Stephenson
- Sentry
- Charles Tannen
- Smitty - Craig's Deputy
- Sigfrid Tor
- Holtzfeld
- Bruce Warren
- FBI Agent
- William Yetter Sr.
- Gestapo Agent
