The ninth season of this hit drama, the members of the Las Vegas Crime Scene Investigation Unit put their forensics expertise to the test to solve the trickiest crimes in their jurisdiction, from the Nevada desert to the glamorous Vegas Strip. William Petersen returns as Gil Grissom, who leads a crack team that includes Catherine Willows (Marg Helgenberger), Nick Stokes (George Eads) and Greg Sanders (Eric Szmanda).