Cast (16)

Boris Karloff

Prof. John Mayer

Enrique Guzmán

Dr. Paul Rosten

Christa Linder

Laura

Maura Monti

Dr. Isabel Reed

Yerye Beirute

Thomas

Tere Valez

Nancy

Griselda Mejía

Prostitute

Sergio Kleiner

Alien

Mariela Flores

Deaf-mute victim

Tito Novaro

Gen. Nord

Sergio Virel

Villager

Nathanael León

Villager

Carlos León

Villager

Rosángela Balbó

Martha - mayor's wife

Julián de Meriche

Visiting Dignitary

Arturo Fernández

Crew (19)

José Luis González de León

Director

Jack Hill

Director

Juan Ibáñez

Director

Juan Ibáñez

Writer

Raúl Domínguez

Director of Photography

Enrico C. Cabiati

Original Music Composer

Karl Schanzer

Writer

Luis Enrique Vergara

Writer

Luis Enrique Vergara

Producer

Austin McKinney

Director of Photography

Raul J. Casso

Editor

José Méndez

Art Direction

Octavio Ocampo

Art Direction

Raúl Cárdenas

Set Decoration

Vicente Tostado

Costume Design

Maria Elena Ortiz

Hairstylist

Antonio Ramírez

Makeup Artist

José Luis Cerrada

Production Manager

Enrique Gordillo

Special Effects