As the BAU zeroes in on the suspect of the ritualistic killings they've been investigating in Arizona, a bizarre connection within the UnSub's family could lead them to finally nab the suspect.

The BAU meets their new section chief, Mateo Cruz, who, unbeknownst to them, shares a long work history with JJ. Cruz joins the team as they comb the streets of Baltimore for an UnSub who leaves victims unable to communicate.