Creatures of the Night (S02E21)

The unsolved 1977 case involving the death of Philadelphia doorman Mike Cahill (Zack Graham) is reopened when Rush and Valens try to link his murder to a serial killer about to be released from prison due to a legal technicality. The detectives uncover the unusual relationship between Mike and the serial killer, Roy Anthony (Barry Botswick). Mike worked at an upscale apartment building and was oddly close with one of the married residents, and Roy was a severely troubled teen with an abusive father. Eventually, Rush and Valens discover that Mike's girlfriend at the time of the murder also worked with Roy at a local diner and that a midnight screening of the film "The Rocky Horror Picture Show" was the event that brought the trio together. (Warner Bros. UK)