Paul Muni as Alexei Kulkov

Marguerite Chapman as Lisa Elenko

Larry Parks as Kirichenko

Harro Meller as Ernemann

Roman Bohnen as Kostyuk

George Macready as Colonel Semenov

Eric Rolf as Vassilev

Ludwig Donath as Mueller

Rudolph Anders as Stillman

Philip Van Zandt as Galkronye

Frederick Glermann as Weiler

Paul Andor as Krafft

Wolfgang Zilzer as Krafft

Ivan Triesault as Sgt. Johann Grillparzer