La Noche de Walpurgis (Walpurgis Night, released in the United States as The Werewolf vs. The Vampire Woman and in the UK as The Werewolf's Shadow) is a 1970 Spanish horror movie starring Paul Naschy, the fifth in a series about the werewolf Waldemar Daninsky. This film was directed by León Klimovsky and written by Naschy and Hans Munkel, and is generally regarded to have kickstarted the Spanish horror film boom of the Seventies, due to its awesome box office success upon its release. Patty Shepard was so convincing as the vampiric Countess, it was thought at the time that she might replace actress Barbara Steele as Europe's reigning horror queen. Following the events in Fury of the Wolfman, the deceased lycanthrope Waldemar Daninsky is revived to life when two doctors surgically remove two silver bullets from his heart while performing an autopsy on him. Waldemar transforms into a werewolf, kills the doctors and escapes from the morgue. Some time later, two students, Elvira and her friend Genevieve, go searching for the tomb of medieval murderess (and possible vampiress) Countess Wandessa de Nadasdy. They find a possible gravesite in the vicinity of Waldemar Daninsky's castle, and he invites the girls to stay for a few days.