"After years of life-or-death standoffs, tense showdowns and confrontations with the most dangerous killers alive, the best and brightest of the FBI's Behavioural Analysis Unit finally reach their last cases. As the BAU races against time to find their most cunning and vicious adversary yet - the murderous master of disguise, Chameleon (Michael Mosley) - they find closure in the ongoing drama of their personal lives, including David Rossi (Joe Mantegna), Dr Spencer Reid (Matthew Gray Gubler) and Penelope Garcia (Kirsten Vangsness)"--Container.