- Joel McCrea
- Barry Corvall
- Brenda Marshall
- Brenda Ballard
- Jeffrey Lynn
- Lowell Warrington
- George Bancroft
- Dudley Garrett
- Stanley Ridges
- Hamilton Peyton
- James Stephenson
- Dr. Rader
- Howard Hickman
- Walter Forbes
- Martin Kosleck
- Karl Mullen
- Nana Bryant
- Mrs. Corvall
- Rudolph Anders
- Paul Strawn
- Hans Heinrich von Twardowski
- Dr. Helm
- Lucien Prival
- Decker
- Addison Richards
- Bruce Corvall
- Edwin Stanley
- Secretary of State
- Granville Bates
- Phineas T. O'Grady
- Grace Hayle
- Mrs. O'Grady
- Egon Brecher
- Larsch
- Emmett Vogan
- Instructor
- Enrique Acosta
- Geneva Restaurant Patron
- Eddie Acuff
- Minor Role
- Louis Adlon
- Youth
- Jimmy Aye
- Geneva Restaurant Patron
- Fern Barry
- American Tourist
- Sven Hugo Borg
- Chauffeur
- Sidney Bracey
- Ship Steward
- James Carlisle
- Ball Guest
- Glen Cavender
- Man in O'Grady Crowd
- Loia Cheaney
- American Tourist
- Alice Connors
- American Tourist
- George Davis
- Swiss Gendarme
- Jean De Briac
- Waiter
- Sarah Edwards
- Militant American Tourist
- Christian J. Frank
- Minor Role
- Arno Frey
- Foreign Officer
- Frederick Giermann
- German Officer on Train
- Eddie Graham
- Ball Guest
- Jesse Graves
- Servant at Ball
- John Hamilton
- Code Room Instructor
- Winifred Harris
- Lady Ashford
- John Harron
- American Tourist
- Stuart Holmes
- American Tourist
- William Hopper
- Student
- George Irving
- State Department Official
- Selmer Jackson
- Instructor
- Willy Kaufman
- Straubel
- Glenn Langan
- Student
- Vera Lewis
- American Tourist Going to Desert
- Rolf Lindau
- Foreign Agent
- Charles Frederick Lindsley
- Announcer
- Al Lloyd
- American Tourist
- Tony Martelli
- Geneva Bartender
- Chris-Pin Martin
- Tunisian Guard
- Billy McClain
- Manservant at Ball
- Robert Middlemass
- Militant American Tourist
- Harold Miller
- Ball Guest
- Jack Mower
- Man Opening Door
- Wendell Niles
- Radio Announcer Introducing Garrett
- George Reeves
- Warrington's Secretary
- John J. Richardson
- Man in O'Grady Crowd
- Cyril Ring
- Spectator at Dart Throwing
- Lionel Royce
- Hoffmeyer
- Milton Royce
- Ball Guest
- Sally Sage
- American Tourist
- Alexander Schoenberg
- Man at Canteen
- Ferdinand Schumann-Heink
- Train Conductor
- Hans Schumm
- Foreign Official
- Lester Sharpe
- German Officer on Train
- Bert Stevens
- Student
- Don Turner
- Pilot with Map
- Dorothy Vaughan
- Stout Woman Bumped by Garrett
- Henry Victor
- Foreign Official
- Frederik Vogeding
- Friend of Müller
- Wilhelm von Brincken
- Foreign Official
- Nella Walker
- Mrs. Peyton
- Lottie Williams
- American Tourist Wanting Boat Out
- William Worthington
- Instructor in Montage
- Wolfgang Zilzer
- Heinrich
- Henry Zynda
- Guard
