Since returning to the set of his hit CBS sitcom "Two and a Half Men," Charlie Sheen has been doing his job and minding his sober coach, who is there on standby patrol, reports TMZ.com.

According to TMZ, the new rule that seems to have been put in place is that the cast and crew have been told/ordered to keep quiet about what is happening on the show, with the threat of losing their jobs if they violate the rule. A memo was sent warning that anybody who reports what has been happening in the offices or on stage to anyone outside the show will be terminated.

When the work day came to an end, Sheen returned to the rehab facility, TMZ reported

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