Cast
- 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 Col. Semenov
- Erik Rolf as Vassilev
- Ludwig Donath as Prof. Müller
- Rudolph Anders as Stillman
- Philip Van Zandt as Galkronye
Crew
- Zoltan Korda · Director
- John Howard Lawson · Writer
- Janet Stevenson · Writer
- Philip Stevenson · Writer
- Ilya Vershinin · Writer
- Louis Gruenberg · Composer
- James Wong Howe · Cinematographer
- Al Clark · Editor
- Charles Nelson · Editor