Next Tuesday, Oct. 5, the Sundance Channel begins airing the 2004 sequel to Tanner '88, one of HBO's earliest items of original programming. Gary Trudeau writes, Robert Altman directs, and Michael Murphy and Cynthia Nixon star. As with the original series, numerous cameos by real people are promised. Four episodes are scheduled, and each one should repeat multiple times during the week (which is a good thing, because the first one airs opposite the vice-presidential debate). Altman and Trudeau first thought of doing the sequel when they got together to film new introductions for the Sundance Channel's rebroadcast of the original series. (Hilarious stuff, BTW.) From what I've read, Cynthia Nixon's character plays a much bigger role in the sequel than in the original series. Young Alex Tanner has grown up to be a documentary filmmaker, and the sequel is supposed to focus on her work-in-progress about the political process. M.