Avatar: The Last Airbender was the highest-rated animated television series in its demographic at its premiere;[36] an average of 3.1 million viewers watched each new episode.[36] It had 5.6 million viewers for its highest-rated episode and was a highly rated part of the Nicktoons lineup beyond its 6-to-11-year-old target demographic.
[37][38] A one-hour special,
The Secret of the Fire Nation, consisting of the episodes "The Serpent's Pass" and "The Drill", aired on September 15, 2006, and attracted 5.1 million viewers.
According to the Nielsen Media Research, the special was the highest-rated cable-television program that week.[39] In 2007,
Avatar: The Last Airbender was syndicated to more than 105 countries and was one of Nickelodeon's top-rated programs.
The series ranked first on Nickelodeon in Germany, Indonesia, Malaysia, the Netherlands, Belgium, and Colombia.[40]
The four-part series finale, "Sozin's Comet", had the series' highest ratings. Its first airing averaged 5.6 million viewers, 95 percent more than Nickelodeon had in mid-July 2007.[citation needed] During the week of July 14, it was the most-viewed program by the under-14 demographic.[41][42] The finale's popularity was reflected in online media; Rise of the Phoenix King, a Nick.com online game based on "Sozin's Comet", had almost 815,000 game plays in three days.[43]