Avatar: The Last Airbender: Season 1, Episode 9

The Waterbending Scroll

After Katara attempts to teach Aang waterbending, she is desperate to improve her abilities. When Katara inadvertently stumbles across a waterbending scroll that can help improve her ability while Aang is looking at a pirate's store, she decides to steal it after she realizes that she couldn't hope to afford it; but will she be capable of stealing from the pirates without causing herself and her friends trouble?