Was supposed to be the start of a trilogy called "Trilogia della musica" and should have been followed by two more gialli titled "Killer samba" and "Thrilling blues". Yet, due to Fulci becoming very ill and being forced to stop working for more than two years, the full trilogy project was eventually abandoned.
Released in US theaters in April, 1990 as "The Demon Is Loose".
Since the film was shot in English, it subsequently had to be dubbed into Italian for the Italy release.
The official video for the song "Le Perv" by Carpenter Brut uses footage from the movie.
Shot in winter during the months of December and January.
Lucio Fulci: The talent agent who speaks to Candice over the telephone about a background check he made on George.