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