In a bid to pick up some extra viewers in the November Sweeps, CBS has scheduled the first-ever crossover between its hit crime shows "CSI" and "Without a Trace." On Thursday, November 8th, the double-header begins at 8:00 pm ET/PT. The CSI team investigates the death of a boy in Las Vegas who might be a kidnap victim missing from New York six years ago. Anthony LaPaglia from "Without a Trace" guest stars in the first part of the two-part crossover episode. Immediately following at 9:00 pm on "Without a Trace," the FBI and CSI teams race to analyze the killing spree of a mass murderer they are tracking in the conclusion.