When simmering tensions between two rival biker gangs erupts into violence at the Four Aces Casino, Gil Grissom, Catherine Willows, Nick Stokes, and Sarah Sidle find themselves investigating a double homicide, while in Las Vegas, Warrick Brown and Greg Sanders have their hands full with a seemingly endless series of crimes. Original. (A CBS television series, executive produced by Jerry Bruckheimer, starring William Petersen, Marg Helgenberger, Gary Dourdan, George Eads, Jorja Fox, Eric Szmanda, Robert David Hall, & Paul Guilfoyle) (Suspense)