Joel McCrea
Barry Corvall
Brenda Marshall
Brenda Ballard
Jeffrey Lynn
Lowell Warrington
James Stephenson
Dr. Anton Rader
Howard Hickman
Walter Forbes
Martin Kosleck
Karl 'Muller' Mullen
Nana Bryant
Mrs. Corvall
Rudolph Anders
Paul Strawn (as Robert O. Davis)
Hans Heinrich von Twardowski
Dr. Helm
George Davis
Swiss Gendarme (uncredited)
George Bancroft
Dudley Garrett
Stanley Ridges
Hamilton Peyton
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
James Conaty
Ball Guest
Alice Connors
American Tourist
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
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 (voice)
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
Frederick 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