Charlie Sheen is back at work and shooting has resumed on "Two and a Half Men."
The 44-year-old actor voluntarily entered a rehab facility "as a preventative measure" that temporarily halted production of CBS' top-rated sitcom last month.
Sheen still faces legal problems arising from a fight with his wife in Aspen, Colo., in December. He is charged with assault, criminal mischief and menacing, which carries a possible sentence of one to three years in prison.
Sheen pleaded not guilty to domestic violence charges in Colorado's Pitkin County District Court on Monday. A judge scheduled a jury trial for July 21.
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