Otto Becker / Baron Hugo von Detner
Conrad Veidt
Otto Becker / Baron Hugo von Detner

“The girl and the gestapo! Hidden enemies! It's thrilling!!”
Humble stamp dealer Otto Becker has little to do with international politics, so when he receives a surprise visit from his estranged twin brother and Nazi spy, Baron Hugo von Detner, his world is thrown into turmoil. Threatening Becker with deportation, Hugo forces him to use his shop as a front for espionage.
Otto Becker / Baron Hugo von Detner
Conrad Veidt
Otto Becker / Baron Hugo von Detner
Kaaren De Relle
Ann Ayars
Kaaren De Relle
Fritz
Frank Reicher
Fritz
Miss Harper
Dorothy Tree
Miss Harper
Professor Sterling (as Ivan Simpson)
Ivan F. Simpson
Professor Sterling (as Ivan Simpson)
Ludwig
William Tannen
Ludwig
Kurt Richten
Martin Kosleck
Kurt Richten
Joe Aiello
Marc Lawrence
Joe Aiello
Arnold Milbar
Sidney Blackmer
Arnold Milbar
Brenner
Moroni Olsen
Brenner
Grover Blaine McHenry
Pierre Watkin
Grover Blaine McHenry
Sailor (uncredited)
Ernie Alexander
Sailor (uncredited)
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