Korra battles Zaheer, while Bolin and Mako duel Ghazan and Ming-Hua. The captive members of the Air Nation escape and band together to help Korra.

Korra delves deeper into the Avatar's past and realizes what she must do in order to restore balance between the physical and spirit worlds.

When other plans fail, Korra suggests a brave idea to take on the Red Lotus and save the Air Nation.

Mako and Bolin deliver an ominous message from Zaheer.

The duel between Amon and Korra - will Korra be powerful enough to beat Amon?

Korra learns about the epic and mythic origins of the first Avatar.

Korra's three-year journey of healing takes her to unexpected places.

Team Avatar clashes with Kuvira on the streets of Republic City; Pema and Prince Wu help evacuate innocent citizens.

The fate of the Earth Kingdom and the Avatar's life is at stake, when Korra comes face to face with Kuvira.

Korra goes undercover as the war between benders and non-benders intensifies.

Korra and Asami are stranded in the desert. The members of The Red Lotus negotiate with the Earth Queen.

Bolin helps Opal and Lin save the Beifongs from Kuvira. Korra visits the Spirit World looking for help.

Korra and the Fire Ferrets are in the pro-bending championship, but will the Equalists allow the game to go on?

After being imprisoned by Tarrlok, Korra attempts to analyze the mysterious visions she has been having. Meanwhile, Tenzin, Lin, Mako, Bolin and Asami search for Korra, having been given false information by Tarrlok.

The Equalists begin their attack on Republic City.

Zaheer and his gang try to kidnap Korra.

Korra learns the truth about the group that is planning to destroy her.

Korra faces off with Councilman Tarrlok as Equalist activity continues to rise in Republic City.

Korra enters the Spirit World and struggles with the Avatar's relationship with the spirits.

Korra discovers a new twist in Unalaq's evil plan. Meanwhile, Tenzin realizes he must face his own demons in order to save his daughter.

While the young airbenders look far and wide for Korra, Ikki is briefly captured by two Earth Empire soldiers. Based on what they say, Ikki leads the trio to the swamp. There, Korra is still haunted by visions of being hurt by her past enemies, but manages to connect to the siblings through the great banyan-grove tree's roots. After they beg her to resume her Avatar duties to face Kuvira, Toph's advice helps Korra to let go of her fears, bend the rest of the poison out of herself and re-enter the Avatar State.

Korra and Team Avatar try to stop Kuvira from moving against Republic City; Kuvira unveils a deadly new weapon.

Lord Zuko, Tonraq, Desna, and Eska try to prevent Zaheer from freeing the last prisoner, P'Li, while Korra discovers that the Earth Queen is forcing all the airbenders in Ba Sing Se to join her army. Team Avatar thus devises a plan to free them from the monarch's captivity.

Per Su's suggestion, Korra begins to learn metalbending. Opal admits her reluctance to leave Zaofu due to her obligations to her family while Bolin deals with his fear of learning how to bend metal. Meanwhile, Lin faces her past during an acupuncture sessions, forcing her to relive the circumstances which led to her and Su's strained relationship. After a cathartic release of her repressed emotions, Lin makes amends with her sister as well as Opal, who she convinces to travel to the Northern Air Temple to train with Tenzin. Elsewhere, Zaheer and his group determine Korra's whereabouts shortly after escaping Republic City, deducing that she was under the Metal Clan's protection in Zaofu.

Tenzin, Jinora, and Team Avatar travel toward Ba Sing Se in order to find the new airbenders. Stopping at various villages along the way, they hope to recruit them in order to rebuild the Air Nation, though with little success as they were only able to convince a young boy named Kai to join them. Meanwhile, Zaheer travels the four nations to free his fellow criminals from their prison. After freeing Ghazan and Ming-Hua, they set course for the Northern Water Tribe to free their last member, P'Li. Upon learning of their escape, Lord Zuko sets course for the Northern Water Tribe himself in an attempt to stop them.