Harmonic Convergence has arrived and Vaatu is free from his prison. Korra begins their fated battle by throwing Unalaq out of the Spirit World in order to battle Vaatu one on one. However, Unalaq is able to use the terrain of the south pole to his advantage and, with some help from Eska and Desna, quickly subdues Mako and Bolin and re-enters the Spirit World. He then stops Korra long enough to merge with Vaatu and turn himself into the Dark Avatar. Korra and Unalaq leave the Spirit World where the battle of the Avatars begins. Meanwhile, Tenzin, Kya, and Bumi search the Spirit World for Jinora, and wind up trapped in a dense fog that preys on their fears and insecurities.moreless
Unalaq and Vaatu, now combined as the Dark Avatar arrive in Republic City and begin to cause chaos in the city. President Raiko has the United Forces attack the giant spirit, but to no avail. After finding Jinora, Tenzin, Kya, and Bumi return to the south pole to find Korra, Mako, and Bolin injured from Unavaatu's power. They retreat to the Spirit World where Kya heals them. Korra has lost all hope now that she has lost her Avatar spirit, but Tenzin tells her to remember that she is herself, not the person Raava made her. With this advice, Korra's spirit heads to Republic City to stop Unavaatu and save the world from 10,000 years of darkness.moreless
Team Avatar arrives in the Southern Water Tribe where they seek assistance from Katara in order to help Jinora. Katara reveals that with it having been over a week since Jinora was trapped in the spirit world, soon she will slip away forever. With Harmonic Convergence just hours away, the group making a daring attempt to enter the spirit world. Mako, Bolin, and Asami head to the portal on a bi-plane while Korra, Tenzin, Kya, and Bumi try to fly in on Oogi. However, Unalaq has already prepared for their arrival and an all out battle ensues.moreless
The team thinks Skaar is getting cruder each day and hire a doctor to teach him manners. But when the others are attacked by Absorbing Man, his new manners may get in the way.moreless
Korra and Jinora have entered the Spirit World. However, before they can begin their search for the spirit portals, angry spirits send the two crashing into river rapids that separate them. Korra winds up in a dark forest where she runs into Iroh, an old friend of Avatar Aang. Iroh takes Korra to his home where he gives her advice on how to reunite with Jinora and find her way around the Spirit World, leading her to embark on a quest to help a young dragon bird spirit. Meanwhile, thanks to her spirit friends, Jinora discovers Wan Shi Tong's Library. Despite still being upset at Avatar Aang's betrayal over 70 years ago, he permits Jinora to say in the library and look for info on the spirit portals. However, the spirit may not be as forgiving as he seems.moreless
Eve is thrilled after a snowstorm hits, cause she can start her annual snow shoveling business, but finds out her friends have beaten her to it, leading Mike to give his daughter some advice.moreless
With Harmonic Convergence just weeks away, Korra reunites with Tenzin and his family at the Eastern Air Temple. With the southern spirit portal heavily guarded by Unalaq's forces, Korra decides to enter the Spirit World and close the spirit portal from the inside so Unalaq cannot stop her. Tenzin agrees to help her enter the spirit world, but Tenzin struggles to enter. However, Jinora may hold the key instead. At the South Pole, Unalaq, believing that Korra is dead, tries to open the northern spirit portal. Meanwhile, in Republic City Mako continues to try and prove that Varrick is responsible for the Cultural Center bombing, but Varrick is one step ahead of him, and uses Bolin and Asami to get to him.moreless
An amnesic Korra is taken to a temple by the Fire Sages on the island she has washed up on. There, the Shaman realizes that Korra is in danger of losing the Avatar Spirit forever. The sages lower her into a pool of healing water where Korra immediately begins to have visions of past Avatars, who tell her she needs to find Raava and restore the Avatar spirit. Korra then sees a vision of Wan, a man who shows her how he became the first Avatar. In the distance past Wan was granted the power of Firebending by a Lion turtle, but was banished from his village when he used it inappropriately. Wandering the spirit wilds, he learns how to control fire and live with spirits, but soon makes a fatal error that will affect the future of everyone.moreless
Korra continues to watch Wan's adventures unfold as he and Raava travel the world in hopes of finding the other lion turtle cities and stopping Vaatu. Wan manages to obtain all four elements of the world, and eventually reunites with people from his original village. However, Vaatu's dark power possesses the spirits and causes a battle between them and the humans leading the humans to perish in battle. With time running out for Raava and the light, Wan and Raava head to the South Pole where the Harmonic Convergence, a fierce battle between Raava and Vaatu will take place to decide the fate of the world.moreless
Nikita decides that Division should accept a government mission to assassinate the President of Chad while he's in Paris, but Alex disagrees with the plan and refuses to be a part of the mission. Frustrated that Nikita is keeping secrets from the rest of the group, much like Percy did, Alex asks Birkoff to dig up secrets on Danforth to use as leverage in case the government tries to shut down Division. However, Alex and Birkhoff are stunned when they uncover a secret so big it could threaten Division's existence.moreless
The forces of love and hate clash when the Star Sapphires summon Carol back to Zamaron to battle Atrocitus.
Emily stands by Daniel as he faces his fiercest business rival; Aiden takes a dark turn and, Conrad Grayson winds up in control of Amanda's future.
In the mid-Season finale Nolan deals with a skeleton from his past while, Daniel's role is challenged, and Carl's christening reveals new concerns for Jack and Declan.
In this flashback episode, which takes place mostly in 2006, a visit from Victoria's mother sheds some light on how Victoria became the woman she is today. Also, Emily begins her first mission under Takeda's instruction and meets Aiden. Elsewhere, Nolan's company goes public, Jack's father crosses paths with an unfortunate crowd, and information is revealed about Ashley's past.moreless
When Kang traps the Avengers in a temporal void and once again tries to conquer the world, a new team of heroes is assembled to save the day, but do these unlikely allies have what it takes to work cooperatively and fight off an invasion from the 30th century?moreless
Hal and the Green Lanterns must defend Oa from the Red Lanterns.
The Red Lanterns begin their invasion of the Green Lantern homeworld, Oa, and Hal and the others must destroy the lighthouse and stop Atrocitus from penetrating the maelstrom.
When Queen Iolande's brother Ragnar becomes an evil Red Lantern, Hal and the others must return to Betrassus to stop him.
Razer decides to confront his former master and seeks out Atrocitus on the Red Lantern's homeworld of Shard.