A surgeon transplants the heart of an ape into his ailing son with horrific results.
| Actor | Role |
|---|---|
 José Elías MorenoDr. Krallman | Dr. Krallman |
 Carlos López MoctezumaGoyo | Goyo |
 Armando SilvestreLt. Arturo Martinez | Lt. Arturo Martinez |
 Norma LazarenoLucy Ossorio | Lucy Ossorio |
 Agustín Martínez SolaresJulio Krallman | Julio Krallman |
 Gerardo ZepedaMonstruo | Monstruo |
 Noelia NoelRedhead victim | Redhead victim |
 Gina MorettWoman in Shower | Woman in Shower |
 Nathanael LeónSecurity Chief | Security Chief |