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).
Narciso Ibáñez Menta
Doctor Mainen
Emilio Gutiérrez Caba
The Traveler
Ramiro Oliveros
Parapsychologist
Berta Cabré
Teresa (as Berta Singerman)
Ovidi Montllor
Carlos
Antonio Molino Rojo
Priest