- Tim Holt
- Karl Bruner
- Bonita Granville
- Anna Müller
- Kent Smith
- Professor Nichols
- Otto Kruger
- Colonel Henkel
- H.B. Warner
- The Bishop
- Lloyd Corrigan
- Franz Erhart
- Erford Gage
- Dr. Schmidt
- Hans Conried
- Dr. Graf
- Gavin Muir
- Nazi Major
- Nancy Gates
- Brenda
- Carla Boehm
- Magda
- Egon Brecher
- Mr. Müller
- Billy Brow
- Boy
- Frances Brown
- (uncredited)
- Bill Burrud
- Prof. Nichols' Student
- Bruce Cameron
- Storm Trooper
- Paula Corday
- Young Matron
- Yvonne Cross
- Bit
- Harry Duff
- Boy
- Frank Eldredge
- Gestapo Man
- Douglas Evans
- Radio Announcer
- William Forrest
- American Vice Consul
- Louise Franklin
- Woman
- Raoul Freeman
- Guard
- Curt Furberg
- German Officer
- Carey Harrison
- German Officer
- Ariel Heath
- Young Matron
- Mame Henderson
- Girl
- Elsa Janssen
- Mrs. Müller
- Cullen Johnson
- German Boy
- Genevieve Kendall
- Girl
- Max Linder
- Court Clerk
- Orley Lindgren
- Boy
- Jack Lindquist
- Chorus Member
- Anne Loos
- N.S.V. Worker
- Max Lucke
- Plane Dispatcher
- Richard Martin
- Gestapo Man
- Harry McKim
- Boy
- John Merton
- Gestapo Officer
- Frank O'Connor
- Tribunal Judge
- Joey Ray
- Man in Labor Camp
- Betty Roadman
- Matron
- John Arthur Stockton
- Gestapo Officer
- Mary Stuart
- Bit
- Ann Summers
- Minor Role
- Peter van Eyck
- Arresting Sergeant
- Edward Van Sloan
- Chief Tribunal Judge
- Roland Varno
- Lieutenant S.A.
- Nicholas Vehr
- Gestapo Man
- Bess Wade
- Mother
- Crane Whitley
- Whipping Sergeant
- Kathryn Wilson
- Chief Matron
- Chris Wren
- Boy
- Jimmy Zahner
- Prof. Nichols' Student
