S04E02: A Tale of Two Santas

Bender is declared the new Santa when it is discovered that the evil Santabot has been frozen in a block of ice on Neptune. But when Bender begins delivering toys, the citizens, who are unaware that Santa is now a good guy, stage an all-out assault against him. Just when things can't get any worse, the evil Santa's icy tomb thaws and he escapes to exact his wrath upon the world.