The BAU tracks what they believe to be two unsubs who go on spree killings morning and night. Luke visits the prison that Reid is in to ensure his safety.
The team searches for an unsub who has left several men and women disfigured after subjecting them to multiple acid attacks. Meanwhile, Reid starts to settle into his new surroundings.
The team is sent to Palm Springs, California, to investigate the discovery of some heavily damaged male bodies. Meanwhile, Reid is struggling to juggle both his job and his mother.
The team heads to Tampa, Florida, where some strange hieroglyphs are appearing on the bodies of suicide victims. Meanwhile, Reid brings his mother to come live with him.
Experienced profiler Stephen Walker joins the team as they look for a killer in Yakima, Washington, after the remains of twelve people are found lying in a creek.
The team is called in to find three children who went missing during a bike ride and may be connected to an unsolved crime from thirty years ago.