Captain Alan Thorndike

Walter Pidgeon

Jerry Stokes

Joan Bennett

Major Quive-Smith

George Sanders

Mr. Jones

John Carradine

Vaner the Cabin Boy

Roddy McDowall

Doctor

Ludwig Stossel

Lady Alice Risborough

Heather Thatcher

Lord Gerald Risborough

Frederick Worlock

Captain Jensen

Roger Imhof

Whiskers

Egon Brecher

Saul Farnsworthy

Holmes Herbert

Postmistress

Eily Malyon

Ambassador

Fredrik Vogeding

Umbrella Man

Lucien Prival

Reeves (uncredited)

Herbert Evans

Costermonger

Charles Bennett

Little Fat Man

Edgar Licho

Cab Driver

Frank Benson

Ted Billings

Cockney

John Rogers

Walter Bonn

Major (uncredited)

Lester Matthews

1st Mate

Sven Hugo Borg

Police Lieutenant

Arno Frey

Cab Driver (uncredited)

Cyril Delevanti

London Bobby

Keith Hitchcock

Adolf Hitler

Carl Ekberg

Navigator

Richard Fraser

Sentry

Otto Reichow

Sentry

Bob Stephenson

Policeman

Douglas Gerrard

Sentry

William Haade

Pigeon Man

Adolph Milar

Tracker

Hans Joby

Piel - Saul's Law Clerk (uncredited)

Olaf Hytten

Cockney Boy

Clifford Severn

German Attaché (uncredited)

Kurt Kreuger

Co-Pilot

Bruce Lester

Costermonger (uncredited)

Bobby Hale

Adolf E. Licho

Postmistress' Daughter

Virginia McDowall

Co-Pilot

Bruce Lister

Carl Ottmar

Chief of Harbor Police

William von Brincken

Wilhelm von Brincken