Arrow's efforts to bring a new villain team of Chin 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
Multiple leads must be chased to catch a lethal courier, so the team split up into unexpected pairings: Weller and Roman; Jane and Zapata; and Patterson and Reade.
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
A secret society must be infiltrated by the team in order to solve a tattoo, but in order to access the society, they need help from one of its alumni—Rich Dotcom.
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
Shepherd's true identity is uncovered by the team, as well as her decades-old connection to Weller.
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
A tattoo leads back to Roman and it involves a biker gang with a bad reputation, but the team's unsure if they can trust Roman enough to send him into the field undercover.moreless
The team work with the CIA to stop a wanted terrorist who's mysteriously surfaced in New York City.
Patterson has vanished, as has a newly amnesiac Roman, so the team search for the both, hoping to find them before Shepherd does.
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
The Legends team up with Green Arrow, Flash, Supergirl, and their teammates in 2016 to end the Dominator threat once and for all. Meanwhile, Martin continues to suffer double-memories from the temporal aberration that he caused with his younger self during the mission in 1987 DC.moreless
Oliver finds himself in the life he would have had if the Queen's Gambit hadn't sank and he hadn't been stranded on the island. Meanwhile Felicity calls in Flash and Supergirl to help her and the recruits battle a superpowered thief who has stolen a piece of technology that she needs to find their missing teammates.moreless
Eliza Danvers comes to National City for Thanksgiving, and Alex decides to come out to her mother. Meanwhile, Barry Allen and Cisco Ramon ask Supergirl to help them with the Dominator invasion on their earth, and Cadmus creates an alien-specific virus from the information at the Fortress to complete their master plan.moreless
The Legends travel to the Old West and learn Jonah Hex is in trouble with his arch-nemesis Quentin Turnbull, who wants to conquer the West and make it his own lawless territory. Meanwhile, Rory is ecstatic to be in the Wild West, but Sara makes Amaya work with him to keep him on task, which is easier said than done.moreless
Jane sends a covert SOS to her FBI team when she learns about an imminent attack Sandstorm is ready to launch.
Oliver faces a new vigilante who reminds him of his killing days when he first returned from the island. Meanwhile, Quentin tells Thea about his blackouts, and Prometheus makes contact with his mole. In the past, Kovar tells Oliver about his new arrangement with the Bratva.moreless
The Guardian makes his debut in National City to lend a hand after a parasite alien drains Supergirl of her power; at the same time, Mon-El considers a less-than-desirable career change; and Alex struggles with a new reality.moreless
The team track a timequake to the 1980s Reagan White House... and discover that Damien is an advisor to the President. Meanwhile Amaya and Nate break into the 80s JSA headquarters to recruit help and receive a surprise, and Martin tries to stop his younger self from setting off another temporal aberration.moreless