"Unaired Pilot" (Not part of continuity) Unaired Chap 0
Sokka and his sister Kya must travel the world to find masters for Aang, who is the Avatar. However, they must evade a critical foe, Prince Zuko of the Fire Nation, who wants to capture Aang.
"The Boy in the Iceberg" February 21, 2005 Chap 1
Sokka and Katara, two teenage siblings living in the South Pole, discover Aang and his pet flying bison, Appa, trapped in an iceberg. After Katara accidentally frees him, Aang learns that he is the last surviving Airbender. Meanwhile, his unfreezing attracts the attention of the Fire Nation's Zuko.
"The Avatar Returns" February 21, 2005 Chap 2
Prince Zuko attacks the Southern Water Tribe seeking to capture the Avatar, Aang. Katara and Sokka fly in on Appa to save Aang from the Fire Nation
"The Southern Air Temple" February 25, 2005 Chap 3
While journeying to the North Pole, Aang, Sokka and Katara explore Aang's former home, the Southern Air Temple. Aang learns of his people's genocide at the hands of the Fire Nation; his anger triggers his Avatar State, which in turn alerts the world that the Avatar has returned. Meanwhile, Zuko and his uncle, Iroh, have their ship repaired at a Fire Nation port commanded by a rival, Commander Zhao.
"The Warriors of Kyoshi" March 4, 2005 Chap 4
As Aang and his friends begin crossing the expansive Earth Kingdom, they are captured by the female warriors of Kyoshi Island. Sokka is trained by the Kyoshi Warriors while Aang lets the villager's reverence go to his head.
"The King of Omashu" March 18, 2005 Chap 5
While in Omashu, Aang and the gang accidentally destroy parts of the city on a joyride. The King of Omashu challenges Aang to three tasks that require creative thinking before allowing Aang and his friends to leave the city.
"Imprisoned" March 25, 2005 Chap 6
Aang, Katara, and Sokka camp at a small Earth Kingdom town where all the town's Earthbenders are enslaved by the Fire Nation. Katara accidentally gets an Earthbender, Haru, arrested; in her guilt, she tricks the Fire Nation into arresting her so that she can help to free the Earthbenders from the inside.
"The Spirit World (Winter Solstice, Part 1)" April 8, 2005 Chap 7
The gang find themselves in a small Earth Kingdom village under attack by a Spirit World monster. Aang attempts to stop the monster from destroying the town but is accidentally transported into and trapped within the Spirit World. Meanwhile, Iroh gets captured by a group of Earth Kingdom soldiers and Zuko must track him down.
"Avatar Roku (Winter Solstice, Part 2)" April 15, 2005 Chap 8
Aang must travel to the Fire Temple, while battling Zuko and Zhao, to receive a message from Avatar Roku. He soon finds that even the once loyal sages of the Avatar are against him.
"The Waterbending Scroll" April 29, 2005 Chap 9
Katara steals a Waterbending scroll from a band of pirates and begins to teach Aang waterbending before they reach the North Pole. Zuko and Iroh learn that the pirates were robbed by the Avatar and team up with them in order to capture Aang.
"Jet" May 6, 2005 Chap 10
A band of guerrilla fighters, led by the rogue Jet, rescue Aang, Katara, and Sokka from a small group of Fire Nation soldiers. The Freedom Fighters request their help to rid the neighboring town of the Fire Nation, but Sokka soon grows suspicious of Jet's true intentions.
"The Great Divide" May 20, 2005 Chap11
While crossing a canyon on foot, Aang has to mediate between two tribes, the Zhangs and the Gan-Jins, who have been feuding for almost 100 years. After sending Appa to the other side with the sick and elderly, they are all trapped in the canyon when their Earthbender guide's arms are broken.
"The Storm" June 3, 2005 Chap 12
While a storm approaches, Aang tells Katara why he ran away from the Air temple 100 years ago. Meanwhile on Zuko's ship, Iroh tells the crew the tale of how the prince received his scar and was banished from the Fire Nation.
"The Blue Spirit" June 17, 2005 Chap 13
Aang must travel to an herbalist to retrieve a cure for the ill Sokka and Katara. While returning to his friends, he is attacked and captured by the Yu Yan Archers, sent after him by the newly promoted Admiral Zhao. A mysterious masked swordsman assists Aang in escaping his imprisonment.
"The Fortuneteller" September 23, 2005 Chap 14
Katara convinces Sokka and Aang to go to a village after hearing of a fortuneteller named Aunt Wu there. Aang and Katara become excited when the fortuneteller predicts their love-lives. Sokka, however, doubts Aunt Wu's predictions and is proven correct when the volcano she predicted would not destroy the town becomes active.
"Bato of the Water Tribe" October 7, 2005 Chap 15
Sokka and Katara meet Bato, a warrior from the Southern Water Tribe, at an abbey. When Aang overhears that Sokka and Katara are excited over the prospect of reuniting with their father, he hides a map leading to their father's location. Meanwhile, Zuko, using Katara's necklace, hires a bounty hunter named June to track down Aang.
"The Deserter" October 21, 2005 Chap 16
After being chased out of a Fire Nation festival, Aang, Sokka, and Katara encounter a group of Fire Nation deserters, led by Firebending master and ex-general Jeong Jeong. After realizing that this could be his only chance to learn Firebending, Aang- with the help of Avatar Roku's spirit- convinces Jeong Jeong to teach him Firebending. Meanwhile, Admiral Zhao continues his chase for the Avatar.
"The Northern Air Temple" November 4, 2005 Chap 17
After hearing tales that people with the ability to fly are inhabiting the Northern Air Temple, Aang and the crew travel there, eager to meet Airbenders. However, they instead find a misplaced tribe of Earth Kingdom natives, who, much to Aang's disappointment, have renovated much of the temple.
"The Waterbending Master" November 18, 2005 Chap 18
Finally reaching the North Pole, Aang finds a Waterbending Master. However, the Master refuses to teach Katara because she is a girl. Meanwhile, Sokka spends time with Yue, Princess of the Northern Water Tribe. Admiral Zhao hires the pirates (from The Waterbending Scroll) to assassinate Zuko while he prepares a massive fleet to invade the North Pole.
"The Siege of the North, Part I" December 2, 2005 Chap 19
The Northern Water Tribe braces against the attack by the Fire Nation. Meanwhile, Zuko sneaks into the North Pole to capture the Avatar. Aang, realizing that the Water Tribe cannot defeat Zhao's fleet alone, decides to visit the Spirit World to get help from the Moon and Ocean spirits.
"The Siege of the North, Part II" December 2, 2005 Chap 20
Sokka, Katara and Yue follow Zuko to save Aang. In the Spirit World, Aang learns the identities of the Moon and Ocean spirits, and that they are in danger. As Aang returns to the real world, he is saved by Katara. Meanwhile, Zhao succeeds in capturing the Moon Spirit, the source of all Waterbending.