Julianne Moore has played a range of complicated film characters and she's been Oscar nominated four times for movies including “The Hours.” On Saturday, the 51-year-old takes on another complicated role, portraying real-life conservative firebrand politician Sarah Palin in HBO's “Game Change.” The TV movie, which is based on Mark Halperin and John Heilemann's book of the same name, offers a dramatization of the Republican 2008 campaign and failed presidential bid of John McCain (Ed Harris), as told through the eyes of senior strategist Steve Schmidt (Woody Harrelson).