Half man, half beast, all horror
A surgeon transplants the heart of an ape into his ailing son with horrific results.
- Release Date: February 5, 1969
- Runtime: 81 minutes
- Production countries: Mexico
- Original Title: La horripilante bestia humana
- Original Language: español (Spanish)
Genres: Horror, Science Fiction
Actors: Armando Silvestre, Norma Lazareno, José Elías Moreno, Carlos López Moctezuma, Agustín Martínez Solares