A surgeon transplants the heart of an ape into his ailing son with horrific results.
Night of the Bloody Apes is the title of the 1972 English language version of the 1969 Mexican horror film La horripilante bestia humana, also known as Horror y sexo and as Gomar—The Human Gorilla. The film was directed by René Cardona and is a remake of his 1962 film Las Luchadoras contra el medico asesino, the first in a series of films blending elements of the lucha libre and horror genres.