UPDATE:  You can read about Dourdan’s recent drug-related arrest here.

Fans of CSI will probably have some mixed feelings about their casting lineup this fall.

The good news?  Just a few weeks ago, lead player William Petersen extended his contract with the CBS show.  His current deal had him on the network until next month; his new terms will have him with program through the end of the 2008-09 season.

The bad news?  TV Guide is reporting that another cast member has opted against renewing his gig beyond his May expiration date.  Gary Dourdan, who has starred as Warrick Brown since 2000, has informed his bosses that he will be leaving the successful franchise.  This news comes one year after Jorja Fox chose to walk away as well.  (Though her last air date was technically in November.)

Although it’s unclear when or how Dourdan will depart CSI, make sure you have your Tivos prepared for the season finale on May 15.