The team is in pursuit of a serial killer who abducted two teenagers and murdered one. They must find the second teenager before the killer strikes again.
Caught in an impossible scenario, Reid must square off with an old nemesis, and Derek Morgan comes to the team with a lead that might help catch Mr. Scratch, the elusive fugitive that has been tormenting the team all season.
When Reid fears his mother has been abducted, he asks the BAU to investigate while he's stuck in prison.
When several federal government employees, including a close friend of Walker's, succumb to symptoms of a heart attack, the BAU investigates. Also, Reid anxiously awaits his trial date. Jane Lynch guest stars.
When Ariel begins to act very strangely, Allison suspects the spirit of a murdered stripper is possessing her.