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.
: 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
: 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. The episode is frequently cited as one of
: Admiral Zhao reaches the Spirit Oasis and kills Tui, the Moon Spirit, turning the sky blood-red and stripping all waterbenders of their powers. : Unlike many villains, Zhao is not killed
: 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
: The glowing, giant water form of the Ocean Spirit is a visual homage to the Nightwalker from Hayao Miyazaki’s Princess Mononoke.