
An elite squad of FBI profilers analyzes the country's most-twisted criminal minds, anticipating the perpetrators' next moves before they can strike again. Each member of the "mind hunter" team brings his or her expertise to pinpoint predators' motivations and identify emotional triggers to stop them. The core group includes an official profiler who is highly skilled at getting into the minds of criminals, a quirky genius, the former media liaison who manages to adeptly balance family life and the job, and a computer wizard.

The BAU investigates a series of disfiguring acid attacks on young men and women; Dr. Reid begins to settle into his new surroundings.

A mother steps forward with valuable information for the BAU to aid in their investigation of an unsub known as the bone crusher; Reid must adapt to a new set of rules in prison.

The team tracks a serial killer when remains of numerous victims are found in the walls of an elderly couple's home; the hunt becomes urgent after the BAU learns the killer's specific ritual of when to strike; Rossi reconnects with his ex-wife.

Packages with gruesome contents are delivered to six people in the Washington, D.C. area; Simmons and Kristy struggle to connect with their son, David, who is suspended from school for aggressive behavior.