Avatar Book 2 Earth Episode 12 - The Serpent's Pass Episode Title:The Serpent's Pass.Episode Description:After leaving the desert, the group fortuitously meets up with Suki and the Kyoshi Warriors, and attempts to lead a couple through the Serpent's Pass, a dangerous route to the outlands of Ba Sing Se. They are attacked by a giant sea serpent, but ward it off and make it past. Meanwhile, Zuko and Iroh, assuming identities as Earth Kingdom refugees, are also on their way to start a new life in the Earth Kingdom capital, and encounter Jet and some of the Freedom Fighters, with whom Zuko starts to bond. The group finally makes it to Ba Sing Se only to find the Fire Nation is about to send a gigantic drill to penetrate the titanic outermost walls of the capital region, which have protected the people within, including the Earth Kingdom leadership, from more than a century of Fire Nation assault.