U.S. spies catch a Moscow-born U.S. citizen helping spies, and they force him to counterspy.
Acting
Borgnine's sweaty desperation sells every frame.
Direction
De Toth's documentary-style realism hits different.

Director
André de Toth
Trivia, insights & behind the scenes
Based on Boris Morros, a real Hollywood producer turned FBI double agent who informed on the Soviets for nearly a decade.
De Toth shot on actual NYC and Berlin locations with minimal permits, giving it that raw 'you're there' urgency most studio spy films lacked.