Book One: Water
Katara and Sokka (a brother and sister from the Southern Water Tribe) discover the Avatar (a 12-year-old Airbender boy named Aang) frozen in an iceberg. Together the three begin their journey to the North Pole to find a master waterbender so Aang can begin his Avatar training!
Episodes
1 The Boy in the Iceberg Feb 21, 2005 
2 The Avatar Returns Feb 21, 2005 
3 The Southern Air Temple Feb 25, 2005 
4 The Warriors of Kyoshi Mar 4, 2005 
5 The King of Omashu Mar 18, 2005 
6 Imprisoned Mar 25, 2005 
7 The Spirit World: Winter Solstice (1) Apr 8, 2005 
8 Avatar Roku: Winter Solstice (2) Apr 15, 2005 
9 The Waterbending Scroll Apr 29, 2005 
10 Jet May 6, 2005 
11 The Great Divide May 20, 2005 
12 The Storm Jun 3, 2005 
13 The Blue Spirit Jun 17, 2005 
14 The Fortuneteller Sep 23, 2005 
15 Bato of the Water Tribe Oct 7, 2005 
16 The Deserter Oct 21, 2005 
17 The Northern Air Temple Nov 4, 2005 
18 The Waterbending Master Nov 18, 2005 
19 The Siege of the North (1) Dec 2, 2005 
20 The Siege of the North (2) Dec 2, 2005