<Tr> <Td_colspan="9"> The gang discovers that there have been strange disappearances in a Fire Nation town during a full moon . They befriend an old innkeeper named Hama, who reveals that she is a waterbender from the Southern Water Tribe that had been taken away sixty years previously alongside her fellow Southern waterbenders . She becomes Katara's mentor and shares with her the tragic story of her life as a longtime prisoner of the Fire Nation . A horrified Katara discovers that Hama is enacting her revenge by kidnapping Fire Nation civilians with bloodbending, a sinister and dark technique of waterbending which can only be used by an incredibly strong and skilled waterbender, and only during a full moon when his or her waterbending abilities are at their strongest potential . The resulting battle forces Katara to use the technique against Hama to save Aang and Sokka . Hama is taken away by the village, and she congratulates Katara on mastering bloodbending . A horrified and saddened Katara cries and Aang and Sokka comfort her . </Td> </Tr> <Tr> <Th> 49 </Th> <Td> 9 </Td> <Td> "Nightmares and Daydreams" </Td> <Td> Moi Animation </Td> <Td> Ethan Spaulding </Td> <Td> John O'Bryan </Td> <Td> November 16, 2007 (2007 - 11 - 16) </Td> <Td> 309 </Td> <Td>--</Td> </Tr> <Tr> <Td_colspan="9"> The invasion is four days away, and Aang begins to feel nervous about confronting the Fire - Lord . Feeling that he is unprepared, he trains constantly and loses sleep, causing him to hallucinate and have nightmares . After three straight days, it takes the collaboration of Sokka, Toph, and Katara to get him to finally sleep and feel confident about facing Fire Lord Ozai . </Td> </Tr> <Tr> <Th> 50 </Th> <Td> 10 </Td> <Td> "The Day of Black Sun, Part 1: The Invasion" </Td> <Td> JM Animation </Td> <Td> Giancarlo Volpe </Td> <Td> Michael Dante DiMartino </Td> <Td> November 30, 2007 (2007 - 11 - 30) </Td> <Td> 310 </Td> <Td> 3.77 </Td> </Tr>

Avatar the last air bender season 3 episode 12