Katara, a young Waterbender, and her brother Sokka have to rescue a strange boy from a cavernous iceberg.
Aang is revealed to be the Airbender. Prince Zuko kidnaps him and it is up to Katara and Sokka to rescue him.
Aang returns to the abandoned Airbender Temple to face his destiny as the Avatar.
Zuko attacks an island untouched yet by war. Aang goes to great lengths to gain Katara's attention.
Aang is forced to endure numerous trials by King Omashu to prove his worth.
The group arrives at a small Earth Nation town occupied by the Fire Nation.
Aang, Katara, and Sokka arrive at a town that is being terrorized by a mysterious force from the spirit world.
Aang hopes to talk to a deceased Avatar during the winter solstice, but first he has to enter the Fire Nation temple without being noticed by the Fire Sages.
Katara continues her efforts to become a waterbending specialist and decides that Aang should learn some waterbending as well.
Just as they are about to be captured by the Fire Nation, Aang and Katara are saved by a teenage rebel named Jet. But Jet may just be a thug out to rob anyone who comes his way.
Aang and friends are asked to guide some refugees through a dangerous canyon, but the refugees are from long warring tribes.
Plagued by nightmares and taunts from villagers who claimed he'd abandoned them, Aang reveals how he became the Avatar. As he recounts his childhood, a storm threatens the land.
Katara and Sokka become too ill to travel, so Aang travels on his own in search of a cure for them.
Aang and Sokka try to convince a town that their fortuneteller's predictions are wrong.
Aang's jealousy over Katara and Sokka's old friend Bato is ill-founded when Bato turns out to betray his friends to a bounty hunter.
While at a Fire Nation town, Aang's identity as the Avatar is revealed. He is rescued by Master Jeong Jeong's student, but the master refuses to teach him firebending skills.
Aang and friends meet a group of gliders who are defacing the Northern Air Temple that was previously home to airbenders.
Aang and Katara hope to learn waterbending skills in the North Pole, but the waterbending master refuses to teach Katara because she's a girl.
The Northern Water Tribe is attacked by Admiral Zhao and the city walls start to fall. To save the city, Aang contacts the spirit world.
After returning from the spirit world, Aang is surprised to find Admiral Zhao laying siege to more of the Norther Water Tribe.