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