The Howl of the Devil

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)

Chema Gómez

(uncredited)