Episode Guide:

Book one: Water:

The Boy in the Iceberg
The Avatar Returns
The Southern Air temple
The Warriors of Kyoshi
Impression
Winter Solstice (Part One) The Sprit World
Winter Solstice (Part Two) Avatar Roku
Waterbending Scroll
Jet
The Great Divide
The Storm
The Blue Sprit
The Fortuneteller
Bato of the Water Tribe
The Deserter
The Northern Air Temple
The Legend so Far
The  Waterbending Master
The Siege of the North Pole (Part one)
The Siege of the North Pole (Part two)

Book two: Earth:

The Avatar State
The Cave of two Lovers
Return to Omashu
The Swamp
Avatar Day
The Blind Bandit
Zuko Alone
The Chase
Bitter Work
The Library
The Desert
The Serpents Pass
The Drill
City of Wall and Secrets
Tales of Ba Si Se
Appa Lost Days
Lake Laogai
The Earth King
The Guru
The Crossways to Destiny

Book three: Fire:

The Awakening
The headband
The pained lady
Sokka’s Master
The beach
The runaway
The Puppetmaster
Nightmares and Daydreams
The Day Of Black Sun