Watch anime online, stream anime episodes online for free.Watch Avatar the last airbender Book 1 Water Episode 5 English version online and free episodes. Anime Episode guide, Chapter Avatar the last airbender Book 1 Water Episode 5 The King of Omashu The next stop on the group’s trip around the world is the Earth Kingdom city of Omashu. There, Aang shows Katara and Sokka the Omashu chute mail delivery system, which he and his friend Bumi used to ride for fun a hundred years ago. The trio gives the chutes a try but runs into trouble after it destroys a cabbage merchant’s cart. Put in front of the crazy King of the city, the gang is given a feast. The King suspects that Aang is the Avatar and puts him through three deadly challenges to test his skills.