A Sheen of 'concern'

CBS  entertainment president Nina Tassler is used to fielding questions about Charlie Sheen, bad-boy star of "Two and a Half Men."

And by now she has her answers down pat.

"We have a high level of concern" about Sheen, she just told a reporter who asked about the actor's offscreen antics. "How can we not?"

Still, "You can't look at it simplistically. Charlie is professional. He comes to work. He does his job extremely well."

He's expected to be taping tonight.

And "the show's a hit."

"That's all I have to say," concluded the woman whose network could be said to be helping to fund Sheen's weekends with porn stars -- and will no doubt continue to do so until the ratings, not the actor, hit bottom.