Gli Amanti d'Oltretomba (released in the U.S. in 1966 as "Nightmare Castle"), the 1965 Mario Caiano (billed as "Allan Grunewald") Italian giallo horror thriller ("So weird!.. So shocking! Do YOU dare see it!"; "A mad sadistic scientist on the loose!"; "WARNING! See it with someone who's shockproof") starring Barbara Steele, Laurence Clift (billed as "Lawrence Clift"), Paul Muller (billed as "Paul Miller"), Helga Line, Giuseppe Addobbati (billed as "John McDouglas"), and Rik Battaglia