A decomposed body is found in a chemical-waste drum abandoned in the mountains. Their subsequent investigation leads Catherine (Marg Helgenberger), Nick (George Eads), and Sara (Jorja Fox) into the wacky world of robot "demolition wars." And in another development, Warrick (Gary Dourdan) and Grissom's (William L. Petersen) probe of a murder in an alley is complicated when the medical examiner "misplaces" the evidence -- for well over a week. ~ Hal Erickson, Rovi