When a victim turns up dead in a crime bearing a striking similarity to a decade-old series of unsolved crimes for whom a vicious serial killer known as CASt took credit, Gil Grissom and his team are called in to investigate, but the situation is complicated by a reporter who receives a letter from someone claiming to be CASt who denies responsibility for the latest killing. 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)