COMA (1978, USA, 113m, 15) ***½ Drama, Mystery, Thriller dist. Metro-Goldwyn-Mayer (MGM) (USA), Cinema International Corporation (CIC) (UK); pr co. Metro-Goldwyn-Mayer (MGM); d. Michael Crichton; w. Michael Crichton (based on the novel by Robin Cook); pr. Martin Erlichman; ph. Victor J. Kemper (Colour | 1.85:1); m. Jerry Goldsmith; ed. David Bretherton; pd. Albert Brenner. cast:…