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

Nicholas Bela

First Sailor (uncredited)

Leon Belasco

Pierre

Roman Bohnen

Baron Shafter

Nina Borget

Stewardess

Harry C. Bradley

Harry C. Bradley

Prof. Keller

Lloyd Bridges

Blonde Officer

Stanley Brown

Michael

Jack Chefe

Deck Steward

Leslie Denison

English Father

Paul Deno

Doorman

Eddie Fetherston

Reporter