The team searches for JJ whilst uncovering the truth behind her time at the state department. They receive assistance from Emily Prentiss, who returns with vital information.
The BAU meets the new Section Chief and are in pursuit of an UnSub in Baltimore.
The Replicator reveals himself when he targets someone at the FBI, and the race is on to catch him before he can strike again.
The Replicator makes his first mistake, and the team moves quickly to Philadelphia—where the victims are—to take advantage of their stalker's lapse.
In the first part of a two-part season finale, the BAU encounters a gang of bank-robbing serial killers in the nation's capital. As the team tries to negotiate the situation that is unfolding inside the bank, one of the team is taken hostage.moreless
In the conclusion of a two-part season finale, the BAU continues to pursue the bank-robbing serial killers and the team determines the suspects have a bigger target. Due to the hostage situation, they must work quickly to diffuse an explosive situation. Meanwhile, a team member is married as Prentiss ponders her future with the BAU.moreless
Garcia asks the team for help after a woman in her survivors' support group disappears on the seventh anniversary of her daughter's disappearance.
While on their separate vacations, each member of the BAU receives a clue from a psychopathic killer who challenges them to save his next victim.