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.
Mlle. Camille L'Espanaye
Sidney Fox
Dr. Mirakle
Bela Lugosi
Pierre Dupin
Leon Ames
Paul
Bert Roach
Mme. L'Espanaye
Betty Ross Clarke
Prefect of Police
Brandon Hurst
Morgue Keeper
D'Arcy Corrigan
Janos The Black One
Noble Johnson
Woman of the Streets
Arlene Francis
Sideshow Spectator (uncredited)
Ted Billings
Franz Odenheimer (uncredited)
Herman Bing
Gorilla (uncredited)
Joe Bonomo
Alberto Montani (uncredited)
Agostino Borgato
Indian at Sideshow (uncredited)
Iron Eyes Cody
Gendarme Using Snuff (uncredited)
Christian J. Frank
Erik, the Gorilla (uncredited)
Charles Gemora
Sideshow Barker (uncredited)
Harrison Greene
Blonde Girl in Sideshow Audience (uncredited)
Charlotte Henry
Victor Albert Adolph Jules Hugo Louis Dupont (uncredited)
Harry Holman
Mignette (uncredited)
Edna Marion
The Dane (uncredited)
Torben Meyer
Bearded Man at Sideshow (uncredited)
Charles Millsfield
Workman / Gendarme (uncredited)
Monte Montague
Gendarme (uncredited)
John T. Murray
Crone (uncredited)
Tempe Pigott
Tenant (uncredited)
Dorothy Vernon
Mirakle's Sideshow Barker (uncredited)
Michael Visaroff
Girl (uncredited)
Polly Ann Young