Friends and Lovers
S1 episode 5 Aired on November 3, 2000

When the naked body of the young man is found in the desert, Grissom and Warrick discover the hallucinatory drugs he had taken at a rave were the cause of his death, and they must examine the evidence to find out the reason. Meanwhile, Catherine and Nick investigate the murder of the dean and sicover that he was killed because he uncovered a secret involving two members of his teaching staff.