This movie is the first of a trilogy that Sebastián D'Arbó, a specialist in parapsychology, filmed on occult topics. The second film is El ser (1982) and the last one Más allá de la muerte (1986).
Keywords:
Parapsychology
Movie tag line: "La Frontera de Lo Desconocido"
Character: Doctor Mainen
Character: The Traveler
Character: Parapsychologist
Character: Teresa (as Berta Singerman)
Character: Carlos