Cast 15

1. 

   Boris Karloff

   Dr. Janos Rukh

2. 

   Bela Lugosi

   Dr. Felix Benet

3. 

   Frank Lawton

   Ronald Drake

4. 

   Frances Drake

   Diana Rukh

5. 

   Violet Kemble Cooper

   Mother Rukh

6. 

   Beulah Bondi

   Lady Arabella Stevens

7. 

   Walter Kingsford

   Sir Francis Stevens

8. 

   Paul Weigel

   Monsieur Noyer

9. 

   Frank Reicher

   Professor Meiklejohn

10. 

    Georges Renavent

    Chief of the Surete

11. 

    May Beatty

    Mme. LeGrand (uncredited)

12. 

    Paul McAllister

    Papa LaCosta (uncredited)

13. 

    Nydia Westman

    Briggs (uncredited)

14. 

    Ynez Seabury

    Celeste (uncredited)

15. 

    Robert Graves

    Gendarme (uncredited)

Crew 17