All Cast
Paul Naschy
Hector Doriani / Alex Doriani / Frankenstein's Monster / Mr. Hyde / Phantom of the Opera / Waldemar Daninsky the Werewolf / Quasimodo / The Devil
Caroline Munro
Carmen
Howard Vernon
Eric
Fernando Hilbeck
Father Damián
Joseph Garco
Biker Robber
Roberta Kuhn
Carmen Plate
Woman
Mariano Vidal Molina
Civil Guard
Pascual Marco
Tamara Greys
Bridgett
Mabel Ordóñez
Lola
Isabel Prinz
Lorena
Nuria Lucas
Robber Girl
Sergio Molina
Adrián (as Serge Mills)
Cris Huerta
Zacarías
Emilio A. Pina
Civil Guard 2
Malena Gracia
Woman (uncredited)