Co-creators Michael Dante DiMartino and Bryan Konietzko wrote the majority of the finale ; DiMartino wrote parts one , three , and four , and Konietzko assisted with parts three and four . Aaron Ehasz , co-executive producer and head writer of the show , wrote part two . Ethan Spaulding directed part one , Giancarlo Volpe directed part two , and Joaquim Dos Santos directed parts three and four . Dos Santos was nominated for an Annie Award for his directing of part three , " Into the Inferno " . Although '' Sozin 's Comet '' was originally written as a three-part story , the creators noticed that the length had grown beyond what they had predicted from the initial script . To avoid pacing issues , they split the final part in two , adding several scenes to fill the remaining time
Annie Award
36th Annie Awards
Sozin's Comet