Katara tracks down the Fire Nation solider who killed her mother.
The kids follow a professor to a spirit library.
Zuko & Aang get a lesson in the true meaning of Firebending.
Azula's after Appa!
Suko & Katara use the power of perfume to save Aang!
Katara bends perfume to save Aang's life!
The invasion begins...
Aang and the gang bend and battle their way to the Earth King!
Aang unleashes a secret weapon!
Appa flies into battle with the Fire Nation!
Aang and Zuko discover more details about their parallel pasts!
The gang journeys to a mysterious fishing village...
While sick, Zuko's feverish dreams predict strange things.
Who will find Appa first? Zuko or Aang?
Will Ba Sing Se ever be the same?
What happened to Appa during his missing days?
Why did Aang disappear when Katara and Soka needed him most?
Beware the canyon crawler!
Is the King playing with a full deck?
Aang searches for a new teacher!
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