The BAU searches for an UnSub who is purposely disfiguring victims. Also, Rossi has an awkward reunion with his ex-wife, Hayden Montgomery, who kept his daughter, Joy, a secret from him for nearly 30 years.

The BAU welcomes back Emily Prentiss as they are called upon to investigate the disappearance of three women

The BAU investigates the cause of several fatal car crashes involving drivers and pedestrians. Also, Reid gets bad news.

When Reid fears his mother has been abducted, he asks the BAU to investigate while he's stuck in prison.

The BAU investigates a workplace shooting committed by a state-of-the-art drone in Silicon Valley.

The BAU must determine what connects six people that each received a mysterious package in order to identify the Unsub. Simmons and his wife deal with their son's suspension from school.

With a member of the BAU in the hospital, the team searches for Everett Lynch, and his daughter, Grace. Also, Spencer has a meaningful visit with his mother, Diana Reid, while she’s experiencing a period of lucidity.

Prentiss and J.J. are faced with important decisions to make about their futures as the BAU travels to Beaumont, Texas to investigate a series of murdered businessmen.