Dr. Janos Rukh
Dr. Felix Benet
Ronald Drake
Diana Rukh
Mother Rukh
Lady Arabella Stevens
Sir Francis Stevens
Monsieur Noyer
Professor Meiklejohn
Chief of the Surete
Mme. LeGrand (uncredited)
Papa LaCosta (uncredited)
Briggs (uncredited)
Celeste (uncredited)
Gendarme (uncredited)
