El secreto del Dr. Orloff

Hugo Blanco

Andros

Agnès Spaak

Melissa

Perla Cristal

Rosa

Magda Maldonado

Amira (as Magda MacDonald)

Marcelo Arroita-Jáuregui

Dr. Conrad Jekyll

?

Pepe Rubio

Juan Manuel

Pastor Serrador

Inspector Klein

Luisa Sala

Inglud Jekyll / Ingrid Fisherman

Manuel Guitián

Ciceron

Ramón Lillo

Emilio, the inspector's assistant

Jesús Franco

Piano Player

?

Marta Reves

?

Daniel Blumer

Karl Steiner

?

Mer Casas

Conrad's Girlfriend

Rafael Hernández

Club Owner