After two low-rated but critically acclaimed seasons, Showtime has pulled the plug on its drama Huff, according to a report in Variety yesterday.  The cast of the show, that focuses on a psychiatrist played by Hank Azaria and his family, was apparently notified earlier in the week.  The show was noted for a huge Emmy campaign after its first low-rated season, resulting in an Emmy for Blythe Danner.  A second season only aired, however, because Showtime exec Robert Greenblatt had been so impressed by the show that he green-lit a second season before the first even aired.  The second season still failed to increase its numbers, so the season finale on Sunday night will also be its series finale.  Huff also stars Oliver Platt, and Season One is available on DVD.