Comedy Central is helping animation fans ring in the New Year with a four-episode "South Park" marathon running from 10 p.m. to 12 a.m., followed by a countdown to midnight from "South Park." The four "kick ass" episodes are fan favorites chosen by viewers through Comedy Central's web site. Alternately, animation fans in the U.K. can celebrate with BBC2's line-up of animated New Year's programming. Two episodes of Aardman Animations' "Rex the Runt" will air New Year's Eve (December 31) at 2:20 and 2:30 p.m. followed by the "The Old Lady and the Pigeons" at 3:20 p.m. Then, on New Year's Day (January 1), BBC2 will air a new episode of "Rex the Runt" at 9:35 p.m. and the International Rocketship-produced "Gary Larson's Tales from the Farside II" at 11:45 p.m.