Entertainment Weekly: Charlie Sheen returns to work Tuesday as production resumes on his CBS sitcom Two and a Half Men. But even after the most dramatic and public fracture yet in Sheen's employment on the series, one must ask: Has anything really changed Sheen took a month off, and seemingly sobered up, but the initial promise of entering into a bona fide addiction treatment facility was replaced by watching the Super Bowl and sending occasional missives to the media (call it Celebrity Rehab: Home Edition).