On screen
Cast
16 credited performers
Boris Karloff
Prof. John Mayer
Enrique Guzmán
Dr. Paul Rosten
Christa Linder
Laura
Maura Monti
Dr. Isabel Reed
Yerye Beirute
Thomas
Artwork unavailable
Tere Valez
Nancy
Artwork unavailable
Griselda Mejía
Prostitute
Artwork unavailable
Sergio Kleiner
Alien
Artwork unavailable
Mariela Flores
Deaf-mute victim
Tito Novaro
Gen. Nord
Artwork unavailable
Sergio Virel
Villager
Nathanael León
Villager
Carlos León
Villager
Rosángela Balbó
Martha - mayor's wife
Julián de Meriche
Visiting Dignitary
Artwork unavailable
Arturo Fernández
Character not listed