Watch anime online, stream anime episodes online for free.Watch Avatar the last airbender Book 2 Earth Episode 13 version online and free episodes. Anime Episode guide, Chapter Avatar the last airbender Book 2 Earth Episode 13 The Drill Aang discovers a Fire Nation drill heading straight for Ba Sing Se, with Azula, Ty Lee, and Mai inside. An Earth Kingdom General gives him the task of stopping it before it destroys the wall that protects the city. Aang and the group succeed in stopping and destroying the drill from the inside. Meanwhile, Jet wishes to recruit Zuko for his Freedom Fighters, but learns that Zuko and Iroh are Firebenders after inferring that Iroh has heated his tea at a Ba Sing Se train station with firebending.