Walter Pidgeon as Captain Alan Thorndike

Joan Bennett as Jerry Stokes

George Sanders as Major Quive-Smith

John Carradine as Mr. Jones

Roddy McDowall as Vaner

Ludwig Stössel as Doctor

Heather Thatcher as Lady Alice Risborough

Frederick Worlock as Lord Gerald Risborough

Roger Imhof as Captain Jensen

Holmes Herbert as Saul Farnsworthy

Egon Brecher as Jeweler

Eily Malyon as Postmistress

Herbert Evans as Reeves (uncredited)

Charles Bennett as

Frank Benson as

Ted Billings as

Walter Bonn as

Sven Hugo Borg as

Cyril Delevanti as Cab Driver (uncredited)

Carl Ekberg as Adolf Hitler

Richard Fraser as

Arno Frey as

Douglas Gerrard as

William Haade as

Keith Hitchcock as

Olaf Hytten as Piel - Saul's Law Clerk (uncredited)

Hans Joby as

Kurt Kreuger as German Attaché (uncredited)

Bruce Lester as

Adolf E. Licho as

Lester Matthews as Major (uncredited)

Virginia McDowall as

Adolph Milar as

Carl Ottmar as

Lucien Prival as

Otto Reichow as

John Rogers as

Clifford Severn as

Robert R. Stephenson as

Frederick Vogeding as

Wilhelm von Brincken as

Bobby Hale as Costermonger (uncredited)