The Ape

The Ape is a 1940 American horror film directed by William Nigh. based on Adam Hull Shirk's play The Ape, which was previously adapted by Nigh as The House of Mystery (1934). The film stars Boris Karloff as Dr. Bernard Adrian who is seeking to cure a young woman's polio through experiments involving spinal fluid.

A kindly mad scientist who uses spinal fluid to cure a young woman's polio. When he runs out of it he takes on a vicious circus ape to complete the formula.