Originally created for (and telecast on) Nickelodeon, the half-hour anime series Avatar: The Last Airbender is set in an alternate world in which the "nations" are divided along the lines of elements: the Water Nation, the Earth Nation, the Fire Nation, and the Air Nation. The titular Avatar was supreme master of the four elements and was predestined to protect the rest of his world against the evil Fire Nation. Abruptly disappearing from view, the Avatar resurfaced in the form of 12-year-old Aang, the last of the Airbender tribe. Discovered frozen in ice near the South Pole by two young members of the Water tribe, Katara and Sokka, the irresponsible Aang had to summon up enough strength -- and self-esteem -- to do battle against the villainous Firebenders. The series' requisite "cute little animal" was Aang's pet lemur, Momo. ~ Hal Erickson, Rovi