Fritz Lang Director Gary Cooper Prof. Alvah Jesper Actor Lilli Palmer Gina Actor Robert Alda Pinkie Actor Vladimir Sokoloff Polda Actor J. Edward Bromberg Trenk Actor Marjorie Hoshelle Ann Dawson Actor Ludwig Stössel The German Actor Helene Thimig Katerin Lodor Actor Dan Seymour Marsoli Actor Marc Lawrence Luigi Actor James Flavin Col. Walsh Actor Patrick O'Moore The Englishman Actor Charles Marsh Erich Actor Don Turner Lingg (uncredited) Actor Clifton Young Actor Ross Ford Paratrooper (scenes deleted) Actor Robert Coote Cronin (scenes deleted) Actor Hans Schumm German Agent (uncredited) Actor Peter Michael German Agent (uncredited) Actor Milton Sperling Producer Albert Maltz Screenwriter Ring Lardner Jr. Screenwriter Max Steiner Original Music Sol Polito Cinematographer Christian Nyby Film Editing