Some of the most popular Christmas specials airing tonight include the classic "It's a Wonderful Life," the animated classic "Rudolph the Red-Nosed Reindeer," and the newest film adaptation of "A Christmas Carol." There are also various holiday-themed TV episodes and specials, such as "The Grinch," "The Polar Express," and "A Charlie Brown Christmas." Additionally, many networks will be airing holiday-themed variety shows featuring music, performances, and comedy.