CSI: Crime Scene Investigation: Dark Sundays

A lavish penthouse party on top of a Vegas hotel and casino plays host to a bizarre set-up to murder in which a security guard is trapped and killed in a private elevator-and the body soon vanishes . . . leading crime scene investigators Nick Stokes and Greg Sanders straight to an uncanny circus troupe with deadly connections to none other than the Russian mafia. In the meantime, Ray Langston and Catherine Willows are called to a psychiatric facility where two patients have just escaped aft...