The Last Airbender turning 20 in 2025, we've ranked every season of Nickelodeon's game-changing animated fantasy series.

Avatar: The Last Airbender went to some dark places with this particular favorite (or darkly memorable) episode for one of its cast members.

Avatar Aang first ventures into the spirit world in the seventh episode of season 1: "The Spirit World (The ... comes from a famous anime: "Neon Genesis Evangelion." Read more: The Top 20 Anime ...