While hallucinating after he gets a brain injury, Dr. Reid is visited by ghosts from his past; the BAU makes a shocking discovery about Lynch that affects Rossi personally; the team comes together to celebrate Rossi's retirement.
Rossi develops some new theories about Everett Lynch, aka The Chameleon; the team sets out on an epic hunt to capture Lynch.
Prentiss and J.J. are faced with important decisions to make about their futures as the BAU travels to Texas to investigate a series of murdered businessmen.
