The Ape (1940)
Director:
William Nigh
Writers:
Adam Shirk (suggested from the play: "The Ape"), Curt Siodmak (adaptation)Stars:
Boris Karloff, Maris Wrixon, Gene O'Donnell
Dr. Bernard Adrian is a kindly mad scientist who seeks to cure a young woman's polio. He needs spinal fluid from a human to complete the formula for his experimental serum. Meanwhile, a vicious circus ape has broken out of its cage, and is terrorizing towns people.
Here is the link to the movie at the Internet Movie database: http://www.imdb.com/title/tt0032215/?ref_=fn_tt_tt_4?