Leslie tries to pass a law extending the community pool hours; Chris thinks of a new way to solve people's problems around the city, which leads to Ron fixing a pothole for a local mother (Lucy Lawless); April and Ben plan a road trip.
The BAU team investigates a series of murders in Bakersfield, California. Also, the team welcomes new agent Kate Callahan into the BAU fold, who assists them in their efforts in solving the cases.
As the team investigates the disappearance of a prominent Boston attorney, secrets of the man's past are revealed.
A delusional vigilante is the latest unsub to test the BAU's profiling powers. Plus, Kate's niece Megan accepts a lift in a stranger's car.
In a gripping season finale, the team race to catch a sophisticated gang of traffickers who have kidnapped Kate's niece Megan and her friend Markayla.