Dr. Dora Materlick
Diana Sorel
Karl Von Rysselberg
Nicholas Ney
Cyclist's Widow (as Marisa Tobar)
María Luisa Tovar
Cyclist
Francisco Bonmatí
(uncredited)
Jesús Alesanco
Francisco Correa
Vampiro de las ruinas
Ricardo Vázquez
Veronica (as Inés Skorpio)
Inés Morales
Margaret (as Loretta Martin)
Loreta Tovar
Erica Rosenberg
Beatriz Elorrieta
Barón von Rysselberg
Antonio Jiménez Escribano
Otto
José Villasante
Housekeeper
Rosario Royo
Major Christopher Roland
Rafael Vaquero
Brenda
Susan Taff
Music
Angelo Francesco Lavagnino
Director
José María Elorrieta
Screenplay
Story
Fermín Sandoval
Enrique González Macho
Producer
Joaquín Torres
Vittorio Gelmetti
Director of Photography
Juan Ruiz Romero
Makeup Artist
Adela del Pino
Production Manager
Rafael Marina
Assistant Director
Enrique Pérez de Gomara
Special Effects
Antonio Molina