The team travels to Ohio in the hopes of tracking down a serial killer preying on married couples. Agent Hotchner considers a team member to fill a vacant role.
While the New Directions prepare to do battle with the Warblers at Regionals, a devastating event shocks the group. Plus, Rachel and Finn make a sudden decision.
John gets an unexpected request from his ex-wife; a maximum deployment is used to capture a suspect who has been impersonating a cop; Lydia is partnered with Russell for a double homicide; Sal and Susan celebrate her promotion.