During the 15th and final season of CRIMINAL MINDS, the Behavioral Analysis Unit embarks on an epic manhunt for 'The Chameleon,' a.k.a Everett Lynch, a serial killer that escaped and nearly killed David Rossi (Joe Mantegna). Despite objections from Emily Prentiss (Paget Brewster), Rossi becomes obsessed with tracking down his nemesis, lynch. Also, Dr. Spencer Reid (Matthew Gray Gubler) and Jennifer 'J.J.' Jareau (AJ Cook) navigate the aftermath of her surprising and complicated confession of her love for him. And, each member of the BAU will wrestle with a pivotal decision that impacts their lives, both professionally and personally.