<p>IT was just another day on a movie set. An actor, who was struggling with alcoholism, asked a maid to bring him water. When she returned, the star's "sober companion" intervened, smelling the substance.</p>
<p>"The bottle had vodka in it, and he took it away," said Chris Prentiss, co-director of the swank Malibu treatment facility, Passages, which employed the "companion."</p>