They Dare Not Love

George Brent

Prince Kurt von Rotenberg

Martha Scott

Marta Keller

Paul Lukas

Baron von Helsing

Peter Cushing

Sub-Lieutenant Blackler

Sig Arno

Louis

Georgia Backus

German Secretary

Edgar Barrier

Capt. Wilhelm Ehrhardt

Don Beddoe

Second Sailor

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Nicholas Bela

First Sailor (uncredited)

Leon Belasco

Pierre

Roman Bohnen

Baron Shafter

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Nina Borget

Stewardess

Harry C. Bradley

Harry C. Bradley

Prof. Keller

Lloyd Bridges

Blonde Officer

Stanley Brown

Michael

Jack Chefe

Deck Steward

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Leslie Denison

English Father

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Paul Deno

Doorman

Eddie Fetherston

Reporter