Avatar The Last Airbender Book 3 Fire Episode 11 The Day of Black Sun, Part 2: The Eclipse Episode Title: The Day of Black Sun, Part 2: The Eclipse Episode Description: Aang, Sokka and Toph search for the Fire Lord inside his secret bunker under the volcano but find only Azula, who simply flees with help from Dai Li agents, trying to stall them until the eclipse concludes. Elsewhere, Zuko confronts his father, denouncing Ozai's treatment of him as cruel, praising Iroh's teachings and fatherly guidance, and revealing his plan to join the Avatar and help him defeat Ozai. As Zuko tries to leave, Ozai reveals what happened to Zuko's mother Ursa to keep him in place: she learned that Zuko's grandfather, Fire Lord Azulon, had commanded Ozai to kill Zuko as punishment for Ozai trying to circumvent Iroh's birthright to the throne. Ursa proposed to remove Azulon so that Zuko would be spared and Ozai would inherit the throne, which Ozai accepted on the condition that she be banished for treason...