The Ape Man is a 1943 American horror film directed by William Beaudine. The film is based on "They Creep in the Dark" by Karl Brown, which was published in The Saturday Evening Post. It stars Bela Lugosi as Dr. James Brewster who is aided by his colleague Dr. Randall (Henry Hall). The doctor manages to transform himself into an ape man hybrid and desperately seeks a cure. Brewster believes that only the injection of human spinal fluid will prove effective as a cure. As Randall refuses to help him, Brewster and his captive gorilla seek involuntary donors.

Plot

Dr. James Brewster and his colleague Dr. Randall are involved in a series of scientific experiments which have caused Brewster to transform into an ape-man. In an attempt to obtain a cure, Brewster must inject himself with recently drawn human spinal fluid. Reporter Jeff Carter and photographer Billie Mason are on assignment initially suggested by an odd man investigating the recent disappearance of Dr. Brewster.