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."