Agent Hotchner revisits the first case he worked at the BAU when details come forth that one of the deadliest serial killers in New England's history has struck again after a 10-year hiatus.

A serial killer who targets random victims in highly visible places to create a sense of public fear is the subject of a BAU investigation.

The BAU hunts a stalker in San Diego who is targeting college students. Meanwhile, the team comes under Strauss' scrutiny in the wake of the loss of Prentiss.

When Morgan's sister sees a woman who looks like their presumed-dead cousin, Cindi, it forces Morgan to confront a lie he told his family last year to provide closure and compels the BAU to reopen the case of her disappearance.

The BAU team heads to Portland, Ore., to investigate a chilling abduction that may be linked to a local couple killed in their home a week earlier.

The BAU team investigates an UnSub with striking similarities to Rossi’s latest obsession, “The Chameleon,” a.k.a. Everett Lynch, who nearly killed him and then disappeared.

When a family annihilator abducts a teen girl, the Behavioral Analysis Unit works the case on either side of the country to save her. But an unlikely connection to a mysterious kit leads to a bigger investigation and at the center of it is Penelope Garcia.

As the team hunts an UnSub who severs spinal cords, they uncover a clue from their last case that points to a serial killing network. To figure out how big this network is, Rossi has to convince a reluctant Garcia to do the one thing she doesn’t want: come back to the BAU.

Alvez and Garcia profile who might be targeting Tyler's ex-girlfriend. JJ helps Prentiss work through an existential hangover. When Rossi's Voit delusions reach a breaking point, Rossi confronts Voit and unpack what has been truly haunting him.