Gideon, Hotchner and their team investigate a series of murders that may have been committed by a pair of suspects working together.
The killer eluded the team before and seems determined that Grissom remember that fact. Meanwhile, Nick and Warrick, assigned to investigate the mysterious vehicular accident, give into their egos as each tries to solve the case first.
When a reality star is murdered, the CSIs investigate the cast, the obsessed fans, and the stars' hidden pasts to find the killer.
Sydney and Nadia learn that Sophia, the head of the orphanage that cared for Nadia as a child, was badly beaten, and when Sloane learns why she was beaten, he fears for Nadia's safety.
When Ben lands in a 1950s psychiatric institution, he must engineer a daring escape for a young woman unjustly committed by her husband. The team is shocked to learn the identity of a mole in Quantum Headquarters.
