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