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)

Jules Dassin