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

Rudolph Anders

Cab Driver (uncredited)

Jessie Arnold

Landlady (uncredited)

Roy Barcroft

Chief Petty Officer (uncredited)

Barbara Bedford

Woman (uncredited)

Walter Byron

Officer (uncredited)

Baldwin Cooke

Waiter (uncredited)

Stuart Crawford

Commentator (voice) (uncredited)

Mark Daniels

Cab Driver (uncredited)

Drew Demorest

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)

William Post Jr.

Harry (voice) (uncredited)

Christian Rub

Mohr (uncredited)

Tim Ryan

Officer (uncredited)

Jeffrey Sayre

Restaurant Patron (uncredited)

Charles Sherlock

Detective (uncredited)

Russell Simpson

2nd Captain (uncredited)

Hermine Sterler

Mrs. Mohr (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