Barry Corvall
Joel McCrea
Brenda Ballard
Brenda Marshall
Dudley Garrett
George Bancroft
Hamilton Peyton
Stanley Ridges
Decker
Lucien Prival
Bruce Corvall
Addison Richards
Secretary of State
Edwin Stanley
Phineas T. O'Grady
Granville Bates
Mrs. O'Grady
Grace Hayle
Larsch
Egon Brecher
Instructor
Emmett Vogan
Geneva Restaurant Patron
Enrique Acosta
Lowell Warrington
Jeffrey Lynn
Minor Role
Eddie Acuff
Youth
Louis Adlon
Jimmy Aye
American Tourist
Fern Barry
Chauffeur
Sven Hugo Borg
Ship Steward
Sidney Bracey
Ball Guest
James Carlisle
Man in O'Grady Crowd
Glen Cavender
Loia Cheaney
James Conaty
Dr. Anton Rader
James Stephenson
Alice Connors
Waiter
Jean De Briac
Militant American Tourist
Sarah Edwards
Christian J. Frank
Foreign Officer
Arno Frey
German Officer on Train
Frederick Giermann
Eddie Graham
Code Room Instructor
John Hamilton
Lady Ashford
Winifred Harris
John Harron
Walter Forbes
Howard Hickman
Stuart Holmes
Student
William Hopper
State Department Official
George Irving
Selmer Jackson
Straubel
Willy Kaufman
Glenn Langan
American Tourist Going to Desert
Vera Lewis
Foreign Agent
Rolf Lindau
Announcer (voice)
Charles Frederick Lindsley
Al Lloyd
Karl 'Muller' Mullen
Martin Kosleck
Geneva Bartender
Tony Martelli
Tunisian Guard
Chris-Pin Martin
Manservant at Ball
Billy McClain
Robert Middlemass
Harold Miller
Man Opening Door
Jack Mower
Radio Announcer Introducing Garrett
Wendell Niles
Warrington's Secretary
George Reeves
John J. Richardson
Spectator at Dart Throwing
Cyril Ring
Mrs. Corvall
Nana Bryant
Hoffmeyer
Lionel Royce
Milton Royce
Sally Sage
Man at Canteen
Alexander Schoenberg
Train Conductor
Ferdinand Schumann-Heink
Foreign Official
Hans Schumm
Lester Sharpe
Bert Stevens
Pilot with Map
Don Turner
Stout Woman Bumped by Garrett
Dorothy Vaughan
Paul Strawn (as Robert O. Davis)
Rudolph Anders
Henry Victor
Friend of Müller
Frederick Vogeding
Wilhelm von Brincken
Mrs. Peyton
Nella Walker
American Tourist Wanting Boat Out
Lottie Williams
Instructor in Montage
William Worthington
Heinrich
Wolfgang Zilzer
Guard
Henry Zynda
Dr. Helm
Hans Heinrich von Twardowski
Swiss Gendarme (uncredited)
George Davis
Executive In Charge Of Production
Jack L. Warner
Additional Dialogue
James Hilton
Executive Producer
Hal B. Wallis
Conductor
Adolph Deutsch
Original Music Composer
Director of Photography
Charles Rosher
Director
Lloyd Bacon
Screenplay
Warren Duff
Frank Donoghue
Editor
Ralph Dawson
Makeup Artist
Perc Westmore
Art Direction
Carl Jules Weyl
Michael Fessier
Original Story
Robert Buckner
Unit Manager
Jack Saper
Sound
Francis J. Scheid
Other
Jo Graham
Associate Producer
Louis F. Edelman
Music Director
Leo F. Forbstein
Wardrobe Supervisor
Milo Anderson
Wardrobe Coordinator
Howard Shoup
Assistant Director
Elmer Decker