The Ape

Boris Karloff

as Dr. Bernard Adrian

Maris Wrixon

as Frances Clifford

Gene O'Donnell

as Danny Foster

Dorothy Vaughan

as Mother Clifford

Henry Hall

as Sheriff Jeff Halliday

Selmer Jackson

as Dr. McNulty

Gertrude Hoffmann

as Jane the Housekeeper

Jessie Arnold

as Mrs. Brill

Billy Bletcher

as Short Mustached Posse Man

Harry C. Bradley

as Quinn

George Cleveland

as Mr. Howley

Ray Corrigan

as Nabu

Pauline Drake

as Young Girl

Mary Field

as Mrs. Mason

Gibson Gowland

as Posse Member

Julia Griffith

as Townswoman

I. Stanford Jolley

as Ape Trainer

Stan Jolley

as Boy in Soda Shop

Jack Kennedy

as Dep. Archie Tomlin

Donald Kerr

as Citizen Carrying Mauled Ape Trainer

Philo McCullough

as Henry Mason

Buddy Swan

as Willie Brill

Minerva Urecal

as Townswoman