When a series of murders are linked to a serial killer who was executed a year ago, the BAU must find the connection between him and the current killing spree.
Daryl, Abraham and Sasha encounter many obstacles and a new threat while trying to return to Alexandria.
Bell decides to use a new medical device company rather than the hospital's usual products; Kit and AJ must stop their feuding to team up against him; Conrad and Nic work to make a child's dreams come true after finding out his cancer has returned.
Gamby and Russell plan to use a homecoming football game as a way to further break Dr. Brown's spirit.
MacGyver and the team must steal diamonds before terrorists beat them to it and trade the jewels for a weapon of mass destruction.