Rachel and Josh search for eight missing women in Albuquerque's West Mesa and realize they may be dealing with more than a lone serial killer. Later: they get a lead in New Mexico from a self-admitted serial killer and catch a break in the Gilgo case.
Rachel and Josh head to New Mexico to analyze methods of tracking serial killers. Later: they uncover eerie connections between the victims and search for a drifter who left a strange message for a local PI.
Josh and Rachel venture across the country to investigate long haul truckers moonlighting as serial killers and uncover systemic failures of law enforcement that kept the group at large. Later: the investigation takes a turn after a potential killer dies in West Virginia.
Josh and Rachel return to the motel where the bodies were dumped to tour the site. Also: they encounter a sex worker who believes she came face to face with the Eastbound Strangler and get an anonymous tip that leads them to the outskirts of Atlantic City.
Confidential testimony surfaces that implicates a local doctor in the death of a young escort, but leaves several questions unanswered. Also: Josh and Rachel return to the Oak Beach community to interview a family about the murders and rumors circulate about a connection to a serial murder case in Atlantic City.
Investigators find that two people are responsible for the killings and try to connect them to another string of murders in Long Island. Also: a big breakthrough comes to light when the former pimp of one of the victims speaks.