"After the death of Victor Frankenstein, two figures vie for control of his monster and the radical technology that created him: the scientist's daughter, and an immortal wizard assisted by a blind bird-woman with an unquenchable thirst for blood."
Alberto Dalbés
as Dr. Seward
Dennis Price
as Dr. Frankenstein
Howard Vernon
as Cagliostro
Beatriz Savón
as Vera Frankenstein
Carmen Yazalde
as Madame Orloff
Anne Libert
as Melissa
Fernando Bilbao
as Monstruo
Luis Barboo
as Caronte
Daniel White
as Tanner
Doris Thomas
as Abigail
Jesús Franco
as Morpho
Lina Romay
as Esmeralda
Eduarda Pimenta
as Asistente de Vera Frankenstein (uncredited)
Roberto Fandiño
Editor
Director
Screenplay
Raúl Artigot
Director of Photography
Original Music Composer
Jean d'Eaubonne
Production Design
Arturo Marcos
Executive Producer
Story
J. de Alberto
Set Decoration
Vincent Gemignani
Music
Vladimir Cosma
Armando Sciascia
Robert Hermel
Mary Shelley
Characters
Monique Adélaïde
Makeup Artist
José Antonio Arévalo
Assistant Director
Robert de Nesle