As I reported in this week's Ask Ausiello, CSI has tapped Tony winner Liev Schreiber to fill the temporary void left by William Petersen. Schreiber will play a seasoned CSI who joins the veteran team at the Las Vegas Crime Lab. He'll debut in Episode 12, slated to air in January.

In other casting prattle, Desperate Housewives has found a new plaything for Eva Longoria. Sources confirm that Mark Deklin, most recently seen as Dr. Shaw on Fox's Justice, is joining the cast for at least three episodes as a love interest for Gabrielle. He first shows up on Nov. 26.