Director
Lambert Hillyer
DIRECTOR
Stars (in credits order)
Boris Karloff
Dr. Janos Rukh
Bela Lugosi
Dr. Felix Benet
Frances Drake
Diana Rukh
Frank Lawton
Ronald Drake
Violet Kemble Cooper
Mother Rukh
Walter Kingsford
Sir Francis Stevens
Beulah Bondi
Lady Arabella Stevens
Frank Reicher
Professor Meiklejohn (Mendelssohn in end credits)
Paul Weigel
Monsieur Noyer
Georges Renavent
Chief of the Surete
Ernie Adams
(uncredited)
Ricca Allen
Bystander (uncredited)
Charles Bastin
French Newsboy (uncredited)
May Beatty
Mme. LeGrand (uncredited)
Ted Billings
Counterman (uncredited)
Ernest A. Bouveron
Helen Brown
Blind Girl's Mother (uncredited)
Daisy Bufford
Infant's Mother (uncredited)
André Cheron
Surete Official Checking Names (uncredited)
Alex Chivra
Cook (uncredited)
Ann Marie Conte
Blind Girl (uncredited)
Edwards Davis
Scientist (uncredited)
Jean De Briac
Gendarme (uncredited)
Dudley Dickerson
Safari Member (uncredited)
Charles Fallon
Gentleman (uncredited)
Constant Franke
Police Detective (uncredited)
Clarence Gordon
Porter (uncredited)
Robert Graves
Winter Hall
Minister (uncredited)
Daniel L. Haynes
Rukh's Head Bearer (uncredited)
Isabel La Mal
Alphonse Martell
Francisco Marán
Paul McAllister
Papa LaCosta (uncredited)
Etta McDaniel
Diane's Safari Attendant (uncredited)
Walter Miller
Derelict (uncredited)
Edward Reinach
Hans Schumm
Clinic Valet (uncredited)
Ynez Seabury
Celeste (uncredited)
Adele St. Maur
Mme. Noyer (uncredited)
Lawrence Stewart
Runner-boy (uncredited)
Fred 'Snowflake' Toones
Native First Seeing Rukh Glow (uncredited)
Ray Turner
Bearer with Geiger-Counter (uncredited)
Lucio Villegas
Pierre (uncredited)
Nydia Westman
Briggs (uncredited)
Lloyd Whitlock