Doctor Beiral, torn apart by the internal struggle between his social persona and the dark instincts that torment him, manages to use his investigations to give life to the monster that he has long held within him.
François-Eric Gendron
as Dr. Octavio Beiral
Amparo Larrañaga
as Florence
Jean-Claude Adelin
as The Other/Mr. Shadow
Elena Bagutta
as Mary (as Elena Fernández)
Fernando Hilbeck
as Dr. Beiral's Father
Luis G. Gámez
as Poole
Ernesto Alterio
as Juan
Berta Casals
as Prostituta
Jaime Domínguez
as
José Antonio Lobato
as Inspector de policía (as Jose A. Lobato)
Isabel Pevida
as
Alfonso Del Olmo
as
