FBI asks LAPD's help to find a body of a soldier who was decapitated by ISIS supporter on video.
Walden baby proofs the house to pass the inspection from the adoption agency. Walden and Alan have a "we're getting a baby party" with their friends.
Walden gets a new toy, but soon finds his future at Nicole's startup may be limited. Meanwhile, Alan can't stay away from Lyndsey and Larry and begins dating Larry's sister.
Alan is upset when he discovers that Lyndsey broke up with Larry and kept this information from him. When Walden’s masculinity is questioned he decides to prove he is a real man.
Walden is feeling frustrated because Nicole has no time for him due to a software project, so he offers to help her with it. Larry convinces Alan to go on a blind date, which Larry arranges.moreless
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
Walden finds himself in danger and must turn to Rose for help as a result if the affair between Alan and Lindsey.
Drew wants to know what Sara is involved in and she gets worried. Jack is left weak by a confession.
Alan spends time with Lyndsey’s boyfriend in hopes of discovery why Lyndsey likes him so much. Walden encourages Jenny to take her acting career more seriously.
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
A tv producer wants to go inside the LAPD and causes trouble for Sanchez and Tao. Rusty has to re write an essay because of help he received.
Martin Tries to clear his name by talking to Detective Lange, Avram hopes Jake will expose another one of the Righteous 36.
Dixon goes undercover at the Savoy after a series of robberies while Sheriff Lamb and Jack investigate the death of the biggest contractor in Las Vegas.
A life strategist, along with the FBI, is enlisted to help Major Crimes to solve the murder of a man who was preparing to testify against the Israeli mob. Provenza, who is in a vulnerable state, displays rare emotion with the strategist and Rusty has a bad day at school.moreless
As dawn comes to Republic City, Team Avatar assembles to stop the Equalists once and for all. General Iroh, Bolin, and Asami head for the air field where they come face to face with Hiroshi, and Asami must make a difficult decision. Meanwhile, Korra and Mako infiltrate the arena and try to expose Amon as a waterbender. However, Amon ups the game and reveals that he has captured Tenzin and the children. Korra and Mako go on the attack leading to one final battle with Amon. The fate of Republic City and bending hangs in the balance.moreless
Tarrlok has taken Korra to a secret compound in the mountains far outside of Republic City and leaves her in a cage. Back in the city Tarrlok frames the Equalists for the attacks. Lin hears the news reports on the radio and leaves the hospital and breaks Mako, Bolin, and Asami out of jail. They team up with Tenzin and infiltrate the Equalists' underground tunnels looking for Korra and the captured Metalbending police officers. After rescuing the police officers, they discover Tarrlok's plan and head to city hall. Meanwhile, trapped at Tarrlok's mountain retreat, Korra takes Tenzin's advice and tries to meditate in order to connect to Aang and figure out what she should do.moreless
Brenda and Fritz again find themselves at odds when the chief suspect in a local murder turns out to be a man under FBI surveillance and suspected to be the lynchpin behind a multimillion dollar interstate burglary ring. Meanwhile, Brenda's parents arrive for a brief, spontaneous visit and come bearing not only gifts but life changing news.moreless
When Beckett travels to L.A. against orders, with Castle, to solve the murder of her ex-partner, Castle questions her motives. Meanwhile, they get to meet the actors who will be portraying Esposito and Ryan in the film adaptation of Castle's first novel 'Heat Wave'.moreless
Five-0 combs a convention to find the killer of a sci-fi fan who was thrown out of a high-rise window. A CIA agent who's interested in the Yakuza that killed McGarrett's parents shows up in town to meet with Steve.moreless