Officers excavate the crawl space beneath John Wayne Gacy's home; Gacy shows Amirante, Kunkle and Kozenczak where he disposed of Rob's body; Johnny Szyc and his best friend, Lynn, venture into Uptown.

A psychiatrist interviews Gacy, revealing disturbing details about his past; Tovar and Kozenczak confront the dark truths of the systemic failures that allowed Gacy to kill for so long; a love story unfolds between Billy Kindred and Maryjane.