Prof. Alvah Jesper

Gary Cooper

Gina

Lilli Palmer

Pinkie

Robert Alda

Dr. Polda

Vladimir Sokoloff

Trenk

J. Edward Bromberg

Ann Dawson

Marjorie Hoshelle

The German

Ludwig Stössel

Katerin Lodor

Helene Thimig

Marsoli

Dan Seymour

Luigi

Marc Lawrence

Col. Walsh

James Flavin

The Englishman

Pat O'Moore

Erich

Charles Marsh

Lingg (uncredited)

Don Turner

First Nurse (uncredited)

Yola d'Avril

American Commander

Clifton Young

Lex Barker

Paratrooper (scenes deleted)

Ross Ford

Cronin (scenes deleted)

Robert Coote

Hella Crossley

German Agent (uncredited)

Hans Schumm

Woman in Street

Elvira Curci

German Agent (uncredited)

Peter Michael

Nurse

Claire Du Brey

Gestapo

Gil Perkins

Nurse

Lotte Stein

Victor Zimmerman

Woman in Bank, Double

Lynne Lyons

British Adjutant

Dan Sheridan

Paul

Rory Mallinson

Gestapo

Eddie Parker

British Officer

Bruce Lester

Italian Soldier

Leon Lenoir

German Soldier

Otto Reichow

German Soldier

Arno Frey

Nun

Maria Monteil

Nun

Lillian Nicholson

Italian Boy

Bobby Santon

Rachele

Hella Crosley

British Pilot

Douglas Walton

British Sergeant

Vernon Downing

British Officer

Holmes Herbert

American Officer

Frank Wilcox

OSS Agent

Michael Burke

Radio Operator

Eddie Dunn

British Officer

Bruce Lister