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.

• Metro-Goldwyn-Mayer
• Conrad Veidt
• Ann Ayars
• Frank Reicher
• Dorothy Tree
• Ivan F. Simpson
• William Tannen
• Martin Kosleck
• Marc Lawrence