Fox's TV standards were highly uncomfortable with the references to the killer leaving his fecal matter over his victims. (It's OK to show dismembered bodies but not OK to mention feces.)
Jim Horn (James Morrison) teams up with Frank to solve this case. Jim Horn's son in this episode is named TC. This is the name of James Morrison's character on the show Space Above and Beyond, another x-files associated show, being produced by the Morgan/Wong duo.
First episode to be written by Glen Morgan and James Wong. They would go on to write 14 more for the series and run the show in its second series.
Jordan's nightmares at the start of the episode featuring clowns gave Brittany Tiplady nightmares of her own.
Lance Henriksen found the scenes with the dismembered corpse particularly unnerving and would have to compose himself between takes. This is testament, more than anything else, to the quality of make-up artist Toby Lindala's work.