Dr. Bernard Adrian
Boris Karloff
Frances Clifford
Maris Wrixon
Mr. Howley
George Cleveland
Nabu
Ray Corrigan
Young Girl
Pauline Drake
Mrs. Mason
Mary Field
Posse Member
Gibson Gowland
Townswoman
Julia Griffith
Ape Trainer
I. Stanford Jolley
Boy in Soda Shop
Stan Jolley
Dep. Archie Tomlin
Jack Kennedy
Citizen Carrying Mauled Ape Trainer
Donald Kerr
Danny Foster
Gene O'Donnell
Henry Mason
Philo McCullough
Willie Brill
Buddy Swan
Minerva Urecal
Mother Clifford
Dorothy Vaughan
Sheriff Jeff Halliday
Henry Hall
Dr. McNulty
Selmer Jackson
Jane the Housekeeper
Gertrude Hoffmann
Mrs. Brill
Jessie Arnold
Short Mustached Posse Man
Billy Bletcher
Quinn
Harry C. Bradley
Director
William Nigh
Screenplay
Richard Carroll
Director of Photography
Harry Neumann
Adaptation
Curt Siodmak
Production Manager
Charles J. Bigelow
Editor
Russell F. Schoengarth
Original Music Composer
Edward J. Kay
Makeup Artist
Gordon Bau
Associate Producer
William T. Lackey
Assistant Director
Allen K. Wood
Music Director
Sound Recordist
Karl Zint
Theatre Play
Adam Shirk