Gary Cooper as Prof. Alvah Jesper

Lilli Palmer as Gina

Robert Alda as Pinkie

Vladimir Sokoloff as Polda

J. Edward Bromberg as Trenk

Marjorie Hoshelle as Ann Dawson

Ludwig Stössel as The German

Helene Thimig as Katerin Lodor

Dan Seymour as Marsoli

Marc Lawrence as Luigi

James Flavin as Col. Walsh

Patrick O'Moore as The Englishman

Charles Marsh as Erich

Yola d'Avril as First Nurse

Lex Barker as

Robert Coote as Cronin

Hella Crossley as

Elvira Curci as

Claire Du Brey as

Gil Perkins as

Lotte Stein as Nurse

Victor Zimmerman as

Dan Sheridan as British Adjutant