Elenco
Lugosi Béla
Prof. Dexter
John Carradine
Prof. John Gilmore
Frank Moran
Ape Man
Teala Loring
Anne Gilmore
Tod Andrews
Steve Rogers
Mary Currier
Hilda Gilmore
Ernie Adams
Tramp, Willie the Weasel
Eddy Chandler
Sergeant
George Zucco
Ape Man
Mike Donovan
Policeman Barney (uncredited)
George Eldredge
Policeman (uncredited)
Horace B. Carpenter
Theater Watchman (uncredited)
Equipe
Sam Katzman
Producer
Robert Charles
Screenplay
Jack Dietz
Producer
Phil Rosen
Director
Glen Glenn
Sound Engineer
Dave Milton
Set Designer
Marcel Le Picard
Director of Photography
Edward J. Kay
Music Director
Barney A. Sarecky
Associate Producer
Ray Mercer
Special Effects
Arthur Hammond
Assistant Director
Carl Pierson
Editor