- Released in 1973
- Running Time: 108 Min
- Production Co: Host Productions Quebec
- Distribution Co: Cinépix Film Properties (CFP) (1973) (Canada) (theatrical) | Cinerama Releasing Corporation (1973) (USA) (theatrical)
- Directed by Harvey Hart
- Written by Robert Schlitt, John Buell
- Starring Karen Black, Christopher Plummer, Donald Pilon, Jean-Louis Roux, Yvette Brind'amour, Jacques Godin, Lee Broker, Terry Haig
- Produced by Paulle Clark, Julian Roffman, Maxine Samuels
- Original Music by Harry Freedman
- Cinematography by René Verzier
- Film Editing by Ron Wisman
Also Known As
- The Hooker Cult Murders
- Canada (French title) - La lunule
- Spain - El rastro
- France - La lunule
- Greece (DVD title) - O kyklos ton sataniston
- Italy - Una squillo scomoda per l'ispettore Newman
- The Demons Hunger
- Deep in the city lies an unmentionable horror.
- Her business is pleasure. Until her date with ... The Pyx.
- See It...Find Out What It Means!