CSI: LA Season 1-Episode 1: "Checkmate"
After a homecoming king, queen, and a victim with the last name of Knight are found dead at the scene of a hit-and-run accident, the C.S.I.'s are called in to investigate. After analyzing the evidence further, the C.S.I.'s realize they are playing a deadly game of Chess, and must work quickly to "checkmate" the killer.