"In 19th century Paris, a maniac abducts young women and injects them with ape blood in an attempt to prove ape-human kinship but constantly meets failure as the abducted women die."
Sidney Fox
as Mlle. Camille L'Espanaye
Bela Lugosi
as Dr. Mirakle
Leon Ames
as Pierre Dupin
Bert Roach
as Paul
Betty Ross Clarke
as Mme. L'Espanaye
Brandon Hurst
as Prefect of Police
D'Arcy Corrigan
as Morgue Keeper
Noble Johnson
as Janos The Black One
Arlene Francis
as Woman of the Streets
Ted Billings
as Sideshow Spectator (uncredited)
Herman Bing
as Franz Odenheimer (uncredited)
Joe Bonomo
as Gorilla (uncredited)
Agostino Borgato
as Alberto Montani (uncredited)
Iron Eyes Cody
as Indian at Sideshow (uncredited)
Christian J. Frank
as Gendarme Using Snuff (uncredited)
Charles Gemora
as Erik, the Gorilla (uncredited)
Harrison Greene
as Sideshow Barker (uncredited)
Charlotte Henry
as Blonde Girl in Sideshow Audience (uncredited)
Harry Holman
as Victor Albert Adolph Jules Hugo Louis Dupont (uncredited)
Edna Marion
as Mignette (uncredited)
Torben Meyer
as The Dane (uncredited)
Charles Millsfield
as Bearded Man at Sideshow (uncredited)
Monte Montague
as Workman / Gendarme (uncredited)
John T. Murray
as Gendarme (uncredited)
Tempe Pigott
as Crone (uncredited)
Dorothy Vernon
as Tenant (uncredited)
Michael Visaroff
as Mirakle's Sideshow Barker (uncredited)
Polly Ann Young
as Girl (uncredited)
Dale Van Every
Screenplay
John Huston
Additional Dialogue
Robert Florey
Director
Adaptation
Tom Reed
Heinz Roemheld
Music
C. Roy Hunter
Recording Supervision
Richard Schayer
Scenario Writer
Ethel M. Kelly
Writer
Howard Salemson
Technical Advisor
Stunt Double
Maurice Pivar
Supervising Editor
Carl Laemmle
Presenter
Gilbert Kurland
Music Supervisor
Edgar Allan Poe
Short Story
Karl Freund
Director of Photography
Joseph A. McDonough
Assistant Director
Charles D. Hall
Art Direction
E.M. Asher
Associate Producer
John P. Fulton
Special Effects
Jack Pierce
Makeup Artist
Charles S. Gould
Carl Laemmle Jr.
Producer
Herman Rosse
Set Designer
Scott R. Beal
Milton Carruth
Editor