The title character of this show must learn to master four elements and stop Fire Lord Ozai
The second season of this show culminated with the liberation of Ba Sing Se (BAH SING SEH). The predecessor of the title character of this show was Roku (ROH-koo), a friend of the great-grandfather of Princess Azula (ah-ZOO-lah), who is captured near the end of this three-season show. The title character of this show must learn to master four elements and stop Fire Lord Ozai (OH-zye). For 10 points, identify this Nickolodeon cartoon whose first season was adapted into a disastrous 2010 M. Night Shyamalan movie.
The second season of this show culminated with the liberation of Ba
{Avatar}: The Last Airbender [or {Avatar}: The Legend of Aang; prompt on The {Last Airbender};