At Friday's executive session, Nina Tassler, president of CBS Entertainment, announced a new character on CSI: Crime Scene Investigation.

Tassler's description of the character, who will replace the departing William Petersen, was interesting, to say the least. He's a doctor and scientist who comes into the CSI as an outsider; he won't start off as the boss. Here's the catch: He's a bit of a DNA expert, and has identified a common profile among serial killers " in his own genes! Sounds a little Dexter-y, no?

So, who do you think should play Dr. McSerialKiller? Tassler suggested they'd be looking for an actor of some stature to fill the role. My first thoughts: Oscar nominees Laurence Fishburne and David Strathairn ( Good Night, and Good Luck), both of whom can convey steely resolve and menace with equal skill. " Mickey O'Connor
TVGuide Links:

• CSI: Crime Scene Investigation
• William Petersen