Trailer
Cast
Boris Karloff
Dr. Janos Rukh
Frank Lawton
Ronald Drake
Paul Weigel
Monsieur Noyer
Frank Reicher
Professor Meiklejohn
Robert Graves
Gendarme (uncredited)
Lugosi Béla
Dr. Felix Benet
Frances Drake
Diana Rukh
Violet Kemble Cooper
Mother Rukh
Walter Kingsford
Sir Francis Stevens
Nydia Westman
Briggs (uncredited)
Paul McAllister
Papa LaCosta (uncredited)
Ynez Seabury
Celeste (uncredited)
Beulah Bondi
Lady Arabella Stevens
Georges Renavent
Chief of the Surete
May Beatty
Mme. LeGrand (uncredited)