Original: The premiere of episodes 52 â "61 throughout the week of Sozin's Comets release received over 19 million views, of which 5.6 million were from the premiere of Sozin's Comet.
Simplified: The premiere of episodes 52 â "61 (episodes 12-21 of Book 3: Fire throughout the week of Sozin's Comets release received over 19 million views, of which 5.6 million were from the premiere of Sozin's Comet.