Cast
William Hopper
Student
Ferdinand Schumann-Heink
Train Conductor
Nana Bryant
Mrs. Corvall
Stanley Ridges
Hamilton Peyton
John Harron
American Tourist
Vera Lewis
American Tourist Going to Desert
Martin Kosleck
Karl 'Muller' Mullen
Howard Hickman
Walter Forbes
Grace Hayle
Mrs. O'Grady
Stuart Holmes
American Tourist
Lionel Royce
Hoffmeyer
Edwin Stanley
Secretary of State
Jean De Briac
Waiter
John J. Richardson
Man in O'Grady Crowd
Frederick Vogeding
Friend of Müller
Addison Richards
Bruce Corvall
Joel McCrea
Barry Corvall
Enrique Acosta
Geneva Restaurant Patron
Jack Mower
Man Opening Door
Granville Bates
Phineas T. O'Grady
Egon Brecher
Larsch
Sidney Bracey
Ship Steward
Christian J. Frank
Minor Role
Glen Cavender
Man in O'Grady Crowd
George Irving
State Department Official
Lester Sharpe
German Officer on Train
Brenda Marshall
Brenda Ballard
Hans Heinrich von Twardowski
Dr. Helm
Eddie Acuff
Minor Role
Winifred Harris
Lady Ashford
Wendell Niles
Radio Announcer Introducing Garrett
Chris-Pin Martin
Tunisian Guard
George Reeves
Warrington's Secretary
Nella Walker
Mrs. Peyton
James Stephenson
Dr. Anton Rader
Lucien Prival
Decker
Emmett Vogan
Instructor
John Hamilton
Code Room Instructor
Selmer Jackson
Instructor
Harold Miller
Ball Guest
Cyril Ring
Spectator at Dart Throwing
Dorothy Vaughan
Stout Woman Bumped by Garrett
Rudolph Anders
Paul Strawn (as Robert O. Davis)
Sarah Edwards
Militant American Tourist
William Worthington
Instructor in Montage
Sven Hugo Borg
Chauffeur
Glenn Langan
Student
Robert Middlemass
Militant American Tourist
George Davis
Swiss Gendarme (uncredited)
Louis Adlon
Youth
Henry Victor
Foreign Official
Wilhelm von Brincken
Foreign Official
Hans Schumm
Foreign Official
Wolfgang Zilzer
Heinrich
Jeffrey Lynn
Lowell Warrington
Billy McClain
Manservant at Ball
George Bancroft
Dudley Garrett