Avatar: The Last Airbender: 3x6
Chapter Six: The Avatar and the Fire Lord
The tale of Avatar Roku and Fire Lord Sozin is revealed to Aang and Zuko by different sources. Both learn about themselves and are shown the origins of the war.
3 - 1Chapter One: The Awakening Sep. 21, 2007
3 - 2Chapter Two: The Headband Sep. 28, 2007
3 - 3Chapter Three: The Painted Lady Oct. 05, 2007
3 - 4Chapter Four: Sokka's Master Oct. 12, 2007
3 - 5Chapter Five: The Beach Oct. 19, 2007
3 - 6Chapter Six: The Avatar and the Fire Lord Oct. 26, 2007
3 - 7Chapter Seven: The Runaway Nov. 02, 2007
3 - 8Chapter Eight: The Puppetmaster Nov. 09, 2007
3 - 9Chapter Nine: Nightmares and Daydreams Nov. 16, 2007
3 - 10Chapter Ten: The Day of Black Sun, Part 1: The Invasion Nov. 30, 2007
3 - 11
3 - 12Chapter Twelve: The Western Air Temple Jul. 14, 2008
3 - 13Chapter Thirteen: The Firebending Masters Jul. 15, 2008
3 - 14Chapter Fourteen: The Boiling Rock, Part 1 Jul. 16, 2008
3 - 15Chapter Fifteen: The Boiling Rock, Part 2 Jul. 16, 2008
3 - 16Chapter Sixteen: The Southern Raiders Jul. 17, 2008
3 - 17Chapter Seventeen: The Ember Island Players Jul. 18, 2008
3 - 18
3 - 19Chapter Nineteen: Sozin's Comet, Part 2: The Old Masters Jul. 19, 2008
3 - 20Chapter Twenty: Sozin's Comet, Part 3: Into the Inferno Jul. 19, 2008
3 - 21Chapter Twenty-One: Sozin's Comet, Part 4: Avatar Aang Jul. 19, 2008