[s1e20] Old Friends [360p]

serves as the explosive finale to Book One of Avatar: The Last Airbender . Directed by Dave Filoni and written by Aaron Ehasz , the episode brings the major themes of sacrifice and balance to a head as the Fire Nation’s massive armada finally breaches the Northern Water Tribe's defenses. Plot Overview

: The glowing, giant water form of the Ocean Spirit is a visual homage to the Nightwalker from Hayao Miyazaki’s Princess Mononoke.

: This episode marks the first appearance (outside of brief flashbacks) of Princess Azula, setting her up as the primary antagonist for the next season. [S1E20] Old Friends

: Consumed by the Avatar State, Aang merges with the Ocean Spirit (forming a giant water creature known as "Koizilla") to obliterate the Fire Nation fleet and end the siege. Key Highlights & Trivia

: Unlike many villains, Zhao is not killed by the heroes but is dragged into the Spirit World by the Ocean Spirit. It is later revealed in The Legend of Korra that he was imprisoned for eternity in the Fog of Lost Souls. serves as the explosive finale to Book One

The episode is frequently cited as one of the best in the series, receiving perfect scores for its animation and emotional weight. It resolves the immediate threat of Admiral Zhao while establishing a higher-stakes conflict by labeling Zuko and Iroh as traitors to the Fire Nation.

: Princess Yue, who was saved by the Moon Spirit as a child, sacrifices her life to restore Tui, becoming the new Moon Spirit. : This episode marks the first appearance (outside

: While his body is held captive by Prince Zuko in a frozen cave, Aang’s spirit seeks help from Koh the Face Stealer, a dangerous spirit who reveals the mortal forms of the Moon and Ocean spirits: Tui and La.