Kara interviews Lena's ex-boyfriend Jack Spheer during Jack's press conference, and uncovers an issue with his nano-technology development that leads to a potential threat.
Season 2 ends with a massive timequake rocking the Legends' ship, which forces them to break the one cardinal rule of time travel in order to fix the problem. But if they are able to destroy the spear, they will face the ultimate consequence.moreless
After Adrian's torture, Oliver disbands the team but Diggle refuses to accept it sitting down. Meanwhile, Felicity gets in deeper with Helix and Curtis agrees to help her.
After obtaining the Spear of Destiny, the Legion of Doom rewrites reality, leaving the Legends changed, perhaps forever. The Legends' and the world's hopes rest with Rory, but being the "hero" is not easy for him. Meanwhile, tension mounts within the Legion of Doom and the reason why the Spear of Destiny needs to be destroyed is revealed.moreless
A large bounty is put out on Supergirl and aliens from far and near attack National City intent on taking out the woman of steel; Alex and Maggie run into Maggie's ex-girlfriend, Emily, who is in town for a week; Hank gets an interesting order from President Marsdin.moreless
Adrian tries to break Oliver, forcing him to confess the one thing that he's never told anyone else. In the past, Oliver unleashes his inner darkness to take down Kovar once and for all.moreless
The Legends devise a plan to retrieve the last remaining fragments of the Spear of Destiny from the Legion of Doom when they find themselves in France at the height of World War I and faced with the knowledge that they must destroy the mystical object. They enlist the help of a soldier named John Ronald Reuel Tolkin and learn that the Spear is leading them into the heart of the war. Meanwhile, the team must all resist the temptation of the Spear; and a former teammate returns.moreless
A new villain comes to National City, putting Supergirl on high alert; at the same time, she faces an attack by the Music Meister. Meanwhile, Winn's girlfriend, Lyra, gets Winn in trouble with the law; and Maggie attempts to help Winn, but old loyalties get in the way.moreless
While Oliver discovers Prometheus' true identity and who has been helping him, Felicity calls upon Helix's resources to help her find Susan.
The Legends track Commander Steel to NASA headquarters in 1970 and learn where Nate's grandfather hid the last fragment of the Spear of Destiny. They also notice a time aberration during the Apollo 13 mission and believe the Legion of Doom might be involved. As the Legends journey into space to intercept Apollo 13, the Waverider suffers massive internal damage and Ray's life is left in jeopardy when he is stranded on the moon.moreless
Rip is captured and forces the Waverider to crash, which strands the Legends seventy million years in the past. Ray leads Amaya and Nate to recover a vital piece of the ship. Meanwhile, in an effort to get the "good" Rip back, Rory suggests they enter Rip's mind, but what Sara and Jax discover in his subconscious is not pleasant and they must fight evil versions of themselves; and Nate and Amaya continue to get closer, but it could cause serious ramifications.moreless
As Alex searches for Jeremiah and Kara investigates a series of alien kidnappings, the sisters realize they must break the rules to foil a new Cadmus plot. In an effort to get Snapper Carr to run a story that would help her stop Cadmus, Kara agrees to set up an interview between Snapper and Supergirl.moreless
As mayor, Oliver faces impeachment and Vigilante. He's forced to rely on Adrian to defend him in court and his teammates to defend him against Vigilante. Meanwhile, Felicity continues using the Pandora information and Curtis hopes to be reunited with his husband.moreless
Alex and Kara are thrilled to have their father, Jeremiah Danvers, back after he's rescued from Cadmus. The Danvers arrange a family dinner to celebrate, but things go awry when a suspicious Mon-El starts to question Jeremiah about his sudden return.moreless
Arrow's efforts to bring a new villain team of China White, Cupid, and Liza Warner to justice are cut short when the ACU receives evidence tying him to Billy's murder. Meanwhile, Thea convinces Felicity to help her take down Susan.moreless
The Legends travel to King Arthur's Camelot and join forces with the Knights of the Round Table to protect a shard of the Spear of Destiny from the now-evil Rip Hunter.
A magical imp named Mr. Mxyzptlk shows up on Earth and declares his love for Kara, who tries to let him down easy. However, he won't take no for an answer and starts to wreak havoc on National City. As Mon-El and Kara argue over how to get rid of Mr. Mxyzptlk, Alex and Maggie celebrate their first Valentine's Day together.moreless
Rene starts to relive painful memories from his past after a traumatic attack at City Hall. Meanwhile, Oliver believes that the best way to stop the one responsible for the attack is to do it as Mayor Queen rather than Green Arrow.moreless
Lena is arrested for helping break Metallo and Lillian Luthor out of prison. While the evidence seems stacked against her, Kara refuses to believe her friend is guilty and fights to clear Lena's name.moreless
After Walker escapes custody, he flees to Russia to sell the nuclear trigger and the team goes after them... even though the mission will cost them one of their own. meanwhile, Rene stays behind to help Quentin with an interview with Susan.moreless
The Legends travel to the winter of 1776 to protect George Washington and the American Revolutionary War. Unfortunately, things don't go as planned, and Sara sends out Nate and Amaya to help. Meanwhile, Jax and Stein, who are busy protecting the incapacitated Waverider from their new enemy, are forced to step into roles for which they feel unprepared.moreless
Armek arrives in National City intent on taking M'gann back to Mars to face her punishment as a traitor. Thinking she'll be safe at the DEO, Hank and Supergirl are in for a startling surprise when shapeshifter Armek is in the building and under disguise.moreless
While the team tracks down a meta to become the new Black Canary, Felicity rediscovers her hactivist roots. In the past, Talia offers to help Oliver get revenge on Kovar if he'll accept her help dealing with the monster within.moreless
The Legends try to rescue Rip, but first must focus on locating the Spear of Destiny. Stein thinks he has the perfect person to help but knows involving her will be risky. Meanwhile, Malcom Merlyn and Damien Darhk realize that Thawne is pitting them against each other.moreless
Supergirl sets out to recapture Livewire, who has seemingly escaped from prison, but her efforts hit a road block when Mon-El puts Supergirl's safety before the citizens of National City. Meanwhile, James decides to be truthful with Kara; and M'Gann falls into a coma following a psychic attack.moreless
The team deals with Laurel's miraculous return, but soon discovers that everything isn't what it seems. Meanwhile, Curtis deals with the aftermath of Paul leaving him, and Felicity comes to terms with Billy's death.moreless
Damien Darhk and Malcolm Merlyn try to capture Rip Hunter in 1967 and create an Aberration big enough to draw the attention of the Legends. However, when the team arrives they discover that Rip has no memories of his past due to "time drift" and is just a graduate film student. After trying to convince Rip of who he was, they discover that he possesses an incredibly powerful artifact known as the Spear of Destiny, which the Legion of Doom is after.moreless
The story of a missing woman named Izzy moves Kara to investigate, even though Snapper Carr has told her to leave the matter alone. When Kara and Mon-El check out the last place Izzy was seen, they end up thrust through a portal to another planet, where the downtrodden are sold as slaves as part of a trafficking ring run by Roulette. Meanwhile, Alex blames herself---and her new relationship with Maggie---for her sister's disappearance.moreless
The Legends travel to 1927 Chicago and quickly realize they have been set up by Eobard Thawne, Damien Darhk and the newest member of the Legion of Doom, Malcolm Merlyn. While everyone is trying to fix what they think is the mission, Jax encourages a reluctant Stein to share his secret with the other Legends. But Stein is taken captive and Sara must decide whether to stop the Legion of Doom or save Stein. Meanwhile, Rory gets an unexpected visitor and isn't sure how to handle it.moreless
The team realizes that Prometheus knows who they really are after the killer attacks Curtis. Meanwhile, Billy finds a clue to Prometheus' identity and sends it to Felicity... before the killer captures him.moreless