Dexter sees an advantage when the police determine that there is a copycat killer on the loose. The bad news is that unless they can locate and stop him, the FBI will take over the Bay Harbor Butcher case completely. He also learns that he was videotaped cleaning his boat at the marina. Since learning that his mother was actually a police informant working for his stepfather, Dexter has been questioning his step-dad's motivation in taking him in. Rita's scheming mother suggests that Dexter's NA sponsor, Lila come to dinner. It all goes well but when Rita later learns that Lila accompanied Dexter on his recent road trip, she announces she never wants to see him again. Dexter and Lila find a new way to relieve Dexter's compulsive urges.