Ken Garito

Grissom and Sarah investigate the murder of a mental-hospital patient and quickly narrow the suspects to several patients and staff members.

Sara and Greg try to determine what or who caused the deaths of two lovers found on a sleeping bag on the floor of a college dormitory room.

When a woman's body, drained of blood, is found in Central Park, the CSIs jump-start an investigation that takes them into a subculture of vampirism.

Riggs and Murtaugh are led into the underground mob world as they investigate a murder in a hospital. Meanwhile, Murtaugh learns that his daughter Riana is secretly dating the son of his neighbor and nemesis (guest star ANDREW PATRICK RALSTON). Also, Riggs spends more time with his childhood friend, Molly (recurring guest star KRISTEN GUTOSKIE); and Scorsese’s real name is revealed.

During the murder investigation of a Navy Lieutenant on leave in Los Angeles, the team uncovers classified surveillance briefs she smuggled into the city that may have been sold to a foreign buyer.

Cuddy receives news that forces her to re-evaluate her priorities; a teenage patient's suspicious body scars suggest his illness is more than physical.