S2E20 · Book Two: Earth - Chapter Twenty: The Crossroads of Destiny

Complete story — includes the ending

Aang and Sokka reunite with Toph and set out to find Katara. Azula has been placed in charge of the Dai Li by Long Feng during the coup. Iroh and Zuko are greeted at the palace by Azula and the Dai Li. Iroh evades capture, but Zuko is quickly overwhelmed and thrown in prison with Katara. Iroh finds Aang Sokka and Toph, joining forces to save their loved ones with help from a captured Dai Li agent. Sokka and Toph rush to the palace to warn the King of the coup, but they arrive as it begins. They reach the throne room, only to be defeated by Azula, Mai, and Ty Lee. As they and the King are led away, Long Feng arrives intent on double-crossing Azula, only to find that the Dai Li no longer obey him. In prison, Katara lashes out at Zuko for the trauma the war has put her through, with the two later bonding over the loss of their mothers. Aang and Iroh arrive at Katara and Zuko's cell to rescue them, just as Katara was pondering using water from the North Pole spirit oasis to heal Zuko's scar. Azula then appears and traps Iroh, offering Zuko his honor if he joins her. Aang and Katara try to escape, but are attacked by Azula, the Dai Li and Zuko, who has made up his mind. Aang attempts to let go of his attachment to Katara and begins to enter the Avatar State, but is killed by Azula's lightning strike before he can complete the task. This interruption prevents Aang from clearing his last chakra, and leaves his attachment to Katara intact. Iroh intervenes to help Katara escape with Aang and is captured. Katara uses the oasis water to resurrect Aang, as Team Avatar and the Earth King fly over the wall in defeat.