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