An Airbender comes to grips with his new reality as war erupts. A century later, a pair of Water Tribe siblings make a discovery that changes everything.
Aang, Katara and Sokka arrive at a small Island, home to elite warriors named after Avatar Kyoshi. The Fire Nation gets wind of the Avatar's whereabouts.
News of a traitor puts the trio at odds in Omashu, where a mechanist and rebels with a charming leader muddle their plans to protect the Earth Kingdom.
In captivity, Aang meets a king with a taste for games. To find their friend, the siblings must navigate a dark tunnel — and put their differences aside.
When the group lands in the Spirit World for a rescue mission, they come face to face with dangerous threats, painful memories and a mysterious entity.
A desperate Aang visits Avatar Roku for help on his journey as the Fire Nation closes in on him. At their fortress, a masked intruder breaks Aang out.
As an attack on the Northern Water Tribe looms, Katara challenges a master Waterbender, Sokka meets a princess, and Aang takes Kuruk's words to heart.
Zhao leads the Fire Nation into the North with a bold plan to weaken the Water Tribe. When the battle takes a dark turn, Aang enters a powerful state.
Determined to learn earthbending, Aang works to free Bumi from prison. Zuko chafes at Iroh's plan to stay hidden. Azula receives a new assignment.
At a high-stakes earthbending match, Aang discovers the teacher he's been seeking. Painful memories emerge after Zuko befriends a farming family.
Aang and his friends must trade powers for parties and politics as they navigate the two-faced court of the Earth King.
Toph puts Aang's skills to the test. In the streets of Ba Sing Se, Sokka searches for a missing friend, while Katara lives a double life.
To uncover a mythic library that could hold the key to defeating the Fire Nation, the team is forced to ally with an old enemy.
When one of their own is captured, the team concocts a risky plan to reach the Earth King. An illness changes Zuko's perspective — and Iroh's.
Torn across the city as the Fire Nation closes in, the team must reunite to save Ba Sing Se — and Zuko must decide where his real loyalties lie.
