SERIES RETURN: The original Mad about You, starring Paul Reiser and Helen Hunt as the married Buchmans, premiered way, way back in 1992, and won Hunt a passel of Best Comedy Actress Emmys. The series ended in 1999, with a finale episode that took their newborn baby, Mabel, and flash-forwarded 22 years into the future, where a now-grown Mabel, played by Janeane Garofalo, had become a young filmmaker. Now, do a flash-forward in the real world 20 years after that finale. The series M