House of the Damned
"13 keys to unleash the living dead."
An architect and his wife are staying in an empty castle in California. They are joined by an unhappily married lawyer and his wife. Things start getting strange when they spot a half man/half beast prowling around the house and keep seeing a headless woman wandering the grounds.
Directors: Maury Dexter
Writers: Harry Spalding
Cast
IMDB: tt0057160