| ....EARTH {{serial chapter summaries}} |
Book One: Water is the first season divided into 'chapters'.
| Ep. # | Ch. # | Title | Aired |
| 1 | 1 | The Boy in the Iceberg | 2.21.05 |
| 2 | 2 | The Avatar Returns | 2.21.05 |
| 3 | 3 | The Southern Air Temple | 2.25.05 |
| 4 | 4 | The Warriors of Kyoshi | 3.4.05 |
| 5 | 5 | The King of Omashu | 3.18.05 |
| 6 | 6 | Imprisoned | 3.25.05 |
| 7 | 7 | Avatar Roku: Winter Solstice Part I | 4.8.05 |
| 8 | 8 | Avatar Roku: Winter Solstice Part II | 4.15.05 |
| 9 | 9 | The Waterbending Scroll | 4.29.05 |
| 10 | 10 | Jet | 5.6.05 |
| 11 | 11 | The Great Divide | 5.20.05 |
| 12 | 12 | The Storm | 05 |
| 13 | 13 | The Blue Spirit | 9.05 |
| 14 | 14 | The Fortune Teller | 9.23.05 |
| 15 | 15 | Bato of the Water Tribe | 10.7.05 |
| 16 | 16 | The Deserter | 10.21.05 |
| 17 | 17 | The Northern Air Temple | 11.4.05 |
| 18 | 18 | The Waterbending Master | 11.18.05 |
| 19 | 19 | Seige of the North: Part I | 12.2.05 |
| 20 | 20 | The Siege of the North: Part II | 12.2.05 |