Paul McCarthy-Boyington

Gideon, Hotchner and their team investigate a series of murders that may have been committed by a pair of suspects working together.

A serial killer begins leaving clues to taunt Grissom; Warrick and Nick clash when they investigate a car accident.

When a reality TV star is murdered, the CSIs investigate the show's cast, the obsessed fans, and the stars' hidden pasts.

Sydney and Nadia are shocked to discover that Sophia (Sonia Braga American Family Kiss of the Spider Woman ) -- the head of the orphanage that cared for Nadia as a child -- has been severely beaten. But Sloane fears for Nadia's life when he learns the reason for the beating. Meanwhile Dixon is faced with a life-altering moral dilemma while on a mission with Vaughn and Jack's doctor (Michael McKean Best in Show This is Spinal Tap Laverne & Shirley ) offers some advice to his ailing patient.