The Desert & The Serpent's Pass

Our heroes are stranded in 'The Desert' with Appa nowhere to be found and when Aang finds out the sandbenders muzzled Appa he gets so angry he goes into the Avatar State; and then in 'The Serpent's Pass' the gang has to navigate their way through a narrow, treacherous piece of land to get to the outer wall of Ba Sing Se. As it turns out, Uncle Iroh and Zuko are also on their way to Ba Sing Se and in an interesting turn of events, they meet Jet and his Freedom Fighters.