cast
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Conrad Veidt
Otto Becker / Baron Hugo von Detner
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Ann Ayars
Kaaren De Relle
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Frank Reicher
Fritz
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Dorothy Tree
Miss Harper
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Ivan F. Simpson
Professor Sterling (as Ivan Simpson)
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William Tannen
Ludwig
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Martin Kosleck
Kurt Richten
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Marc Lawrence
Joe Aiello
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Sidney Blackmer
Arnold Milbar
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Moroni Olsen
Brenner
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Pierre Watkin
Grover Blaine McHenry
- Ernie Alexander Sailor (uncredited)
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Rudolph Anders
Cab Driver (uncredited)
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Jessie Arnold
Landlady (uncredited)
- Walter Bacon Spy (uncredited)
- Polly Bailey Fat Woman (uncredited)
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Roy Barcroft
Chief Petty Officer (uncredited)
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Barbara Bedford
Woman (uncredited)
- Arthur Belasco Detective (uncredited)
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Walter Byron
Officer (uncredited)
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Baldwin Cooke
Waiter (uncredited)
- Hal Cooke Clerk (uncredited)
- Clyde Courtright Doorman (uncredited)
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Stuart Crawford
Commentator (voice) (uncredited)
- Jack Daley Reporter (uncredited)
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Mark Daniels
Cab Driver (uncredited)
- Cliff Danielson Youth (uncredited)
- Jack Deery Diplomat (uncredited)
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Drew Demorest
Reporter (uncredited)
- Harry Denny Restaurant Patron (uncredited)
- Herschel Graham Reporter (uncredited)
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Bernadene Hayes
Rosie (uncredited)
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Edward Hearn
Reporter (uncredited)
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Robert Homans
1st Captain (uncredited)
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Carl M. Leviness
Onlooker at Departure (uncredited)
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Wilbur Mack
Reporter (uncredited)
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George Magrill
Thug (uncredited)
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Frank Marlowe
Sailor (uncredited)
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Charles Meakin
Restaurant Patron (uncredited)
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James Millican
Operator (uncredited)
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Roger Moore
Messenger (uncredited)
- George Noisom Bellboy (uncredited)
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William Post Jr.
Harry (voice) (uncredited)
- Paul Power Restaurant Patron (uncredited)
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Christian Rub
Mohr (uncredited)
- Buck Russell Restaurant Patron (uncredited)
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Tim Ryan
Officer (uncredited)
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Jeffrey Sayre
Restaurant Patron (uncredited)
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Charles Sherlock
Detective (uncredited)
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Russell Simpson
2nd Captain (uncredited)
- Harry Stafford Elderly Man (uncredited)
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Hermine Sterler
Mrs. Mohr (uncredited)
- Tom Stevenson Headwaiter (uncredited)
- Brick Sullivan Radio Operator (uncredited)
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Ray Teal
Officer Graves (uncredited)
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Philip Van Zandt
Thug (uncredited)
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Roland Varno
Bauer (uncredited)
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Duke York
Sailor (uncredited)
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Jeff York
Keeler (uncredited)
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Joe Yule
Barney (uncredited)
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William Bailey
- Margaret Bert
- Joe Gilbert Submarine Radioman (uncredited)