Avatar: The Last Airbender: Season 1, Episode 15

1 - 15: Bato of the Water Tribe

Aang feels neglected as Katara and Sokka reunite with Bato, an old friend of their father's from the South Pole. They begin to reminisce on their times in the past while they wait for a message to arrive from their father; in which Aang believes Katara and Sokka will abandon him and go out to find their father should the message arrive. However, when the messenger gives Aang the message to give to Bato, Aang betrays his friends in a way Katara or Sokka could never imagine. However, when Zuko recruits a bounty hunter named June to track Aang down. His friendship is put to the test, as he must deal with the fact that he betrayed his friends while defending himself from yet another fight.