What happened to Zuko's mom in the show on Nickelodeon called Avatar the Last Airbender?
Season OneSix years prior to the start of the series, Prince Ozai, Zuko's father, makes a bid for the throne over his elder brother Iroh, due to the latter's having recently lost both his only son and his campaign against the city of Ba Sing Se. Fire Lord Azulon, Iroh and Ozai's father, is furious that Ozai would try to cheat Iroh at such a low point in his life, and orders Ozai to kill his eldest son in order for him to realize the severity of his action. Ozai, considering Zuko a disappointment, was willing to kill Zuko to appease his father. However, in an effort to protect him, Ursa, Zuko's mother, does "terrible, treasonous and treacherous things" that result in Azulon's death, Ozai's ascension to the throne, and her own banishment.