When a legless body is found in the New Mexico desert and a second unwilling amputee shows up at the hospital, the BAU team searches for this amateur surgeon before he preys upon his next reluctant victim. Also, Reid's phone calls to a mystery woman have the team intrigued.

A ritualistic killer is hunted after male bodies are found that have been physically altered. Meanwhile, Reid gets anxious at the prospect of meeting his mystery woman.

When Reid discovers that his girlfriend has been kidnapped by her stalker, he and the BAU team band together to find her before it's too late.

The BAU travel to Rapid City after two male victims are discovered murdered in a ritualistic manner. Also, Reid continues to grieve over Maeve’s death.

Derek Morgan brings the BAU a lead in the case against serial killer and escaped convict Mr. Scratch.

Following an explosive face-to-face encounter with Everett Lynch, a.k.a. “The Chameleon,” Dr. Reid suffers from a brain injury and, while experiencing hallucinations, is visited by ghosts from his past. Also, the BAU makes a shocking discovery about Lynch that affects Rossi personally, and the entire BAU team comes together to celebrate Rossi’s retirement.