The Ape

Boris Karloff

Dr. Bernard Adrian

Maris Wrixon

Frances Clifford

Gene O'Donnell

Danny Foster

Dorothy Vaughan

Mother Clifford

Henry Hall

Sheriff Jeff Halliday

Selmer Jackson

Dr. McNulty

Gertrude Hoffmann

Jane the Housekeeper

Jessie Arnold

Mrs. Brill

Billy Bletcher

Short Mustached Posse Man

Harry C. Bradley

Quinn

George Cleveland

Mr. Howley

Ray Corrigan

Nabu

Pauline Drake

Young Girl

Mary Field

Mrs. Mason

Gibson Gowland

Posse Member

Julia Griffith

Townswoman

I. Stanford Jolley

Ape Trainer

Stan Jolley

Boy in Soda Shop

Jack Kennedy

Dep. Archie Tomlin

Donald Kerr

Citizen Carrying Mauled Ape Trainer