Nick Roth

The BAU is called to West Bune, a small town in Texas, to investigate what appears to be spree killings that involve a teenaged boy and his girlfriend.

April's visiting sisters get on her nerves; when Matthew and Jackson witness an accident, they must work together; Callie and Arizona work on their relationship.

The members of the team go under cover on a movie set in Kazakhstan in hopes of disabling a Soviet-era nuclear missile being sold by terrorists.

Bellick shacks up with Michael, Lincoln and Nika in hopes of discovering Westmoreland’s hidden $5 million; a family learns the dangers of hitchhiking when they pick up a stranded T-Bag; Abruzzi rejoins the family and is determined to get his revenge on Fibonnoci; Kellerman makes his move on Sara, who gets a phone call she has been waiting for; and Mahone finally gets his man.

Along with David Sinclair and new FBI Agent Colby Granger, Don discovers a secret code during a raid and enlists Charlie's help to crack it. Using an elaborate game theory model called "hide and seek," Charlie discovers that it is a plan for the assassination of a Columbian exile living in Los Angeles. Charlie and Megan combine their expertise and work closely together to try to prevent the murder from taking place. Elizabeth Peña guest stars.