The city's leading sports surgeon is killed and evidence points to members of a men's rights group. Meanwhile, Billy and Meredith progress to the next step of their relationship.
While the team battles a former ally working with a new villain, Felicity decides to step aside rather than give a presentation that can save Palmer Tech. In the past, Oliver fights the darkness within him with the help of an old friend.moreless
Barry teams up with Wells to find a way to close the breaches, but they are distracted by a meta-human nicknamed Tar Pit who can transform into liquid asphalt. Meanwhile, Iris becomes concerned for Wally's safety when she learns he is drag racing.moreless
A twisted version of Supergirl, one who's the mirror image of the Kryptonian hero, sets out to destroy her National City counterpart. Meanwhile, Kara grows closer to Cat's son Adam.
The team battles Vandal Savage, and Atom's suit falls off and lands in the wrong hands. Stein realizes the best way to retrieve it is by contacting his younger self. Meanwhile, Snart and Rory plan to steal a key element in defeating Savage; and Carter helps Kendra remember something vital.moreless
Team Arrow takes on Shadowspire, an elite black-ops military team gone rogue. When Diggle learns that Andy is connected to them, he turns to his brother for help. Meanwhile, Felicity deals with her first day back on the job as the computer hack for the team.moreless
Cisco works with Harry to stabilize his "vibe" power, and gets a vision of Eobard Thawne killing Dr. McGee. The team soon realizes that Reverse-Flash is back... from a time period before he killed Barry's mother. Meanwhile, Iris says goodbye to her dying mother and suggests that Wally do the same, and Patty prepares to leave Central City.moreless
Hank is confronted by his painful past when a member of the alien race that wiped out his people kidnaps Senator Miranda Crane. Meanwhile, Cat's estranged son arrives in National City.
To stop Vandal Savage from conquering Earth in the year 2166, Rip Hunter travels 150 years into the past to the year 2016 and assembles a unique group of heroes and villains to defeat the time-spanning villain.moreless
Laura's life is in danger, so she fights to survive and defeat a killer as the murder case of perfume mogul Michael Dunham takes a shocking turn.
While Oliver and the team hunt down Damien, Lyla gives Diggle some advice on how to deal with Andy. In the past, Reiter makes a deal with Oliver.
The Flash battles a meta-human whose powers are the opposite of the hero's... and may prove too much for him to handle. Meanwhile, Barry considers whether to tell Patty the truth about his secret identity, and Wally is less than thrilled to have a new family.moreless
Kara does her best to support Winn and keep him safe when his father, the evil Toyman, breaks out of prison; Cat offers Lucy a job at CatCo; and Alex asks Hank to use his powers to help uncover Maxwell Lord's plans.moreless
A perfume mogul is killed in a savage manner and the investigation yields no prime suspect. Meanwhile, Laura and Jake are at odds when they try to define the current state of their relationship.moreless
The team track a killer involved in an urban treasure hunt, and it leads them to places of extremes, including grungy rooftops and lavish music halls. While on the case, Laura ponders the new manifestations of modern love.moreless
Supergirl finds herself in a tense standoff with Non as she tries to rescue Hank from his clutches; and Kara is confronted by Cat about being National City's very own caped crusader.
Kara faces off with Astra after her aunt challenges Kara's beliefs about her mother; and Cat is threatened with being removed as the CEO of CatCo after a hacker exposes her private and damaging emails.moreless
After Damien launches an attack on Oliver and his people at the bay, Oliver retaliates by exposing Damien and HIVE to the public. However, Damien has another trick up his sleeve. Meanwhile, Felicity finds Oliver's engagement ring, and Diggle tries to get the truth from an imprisoned Andy.moreless
Weather Wizard plans to get revenge on Flash and recruits Captain Cold and Trickster to help him. Meanwhile, Harry considers his deal with Zoom, Joe and Iris meet Wally, and Patty meets the man who killed her father.moreless
An earthquake strikes National City, forcing Supergirl, James, and Winn and Cat to draw on reserves of inner strength to deal with the resulting crises. Meanwhile, Alex and Hank are trapped in the DEO base with Jemm, one of the Fort Rozz prisoners.moreless
Teams Arrow and Flash go to ground to come up with a plan to stop Vandal. Malcolm arranges a meeting with the immortal villain, but it doesn't go well. While the teams try to come up with a plan, Carter tries to reawaken Kendra's memories of her past lives.moreless
A mysterious immortal named Vandal Savage comes hunting for Kendra, and Barry and Cisco take her to Star City seeking Oliver's help. Meanwhile, Caitlin and Harrison create a speed enhancer, Velocity-6, but they need Jay to test it and he refuses.moreless
Stress and anger get the better of Kara when she goes too far during a training exercise with Red Tornado, a military cyborg commissioned by Lucy Lane's father, General Sam Lane. Elsewhere, Cat's tough exterior is shaken by a visit from her judgmental mother, Katherine; at the same time, Alex enlists Winn to investigate her father's mysterious death.moreless
Kara is pulled in two directions when babysitting Cat's son, at the same time, National City is hit by a series of bombings. Meanwhile, James feels conflicted when his ex-girlfriend Lucy Lane tries to rekindle their relationship.moreless
Sleeper spies get activated and prepare for assassinations, so the team rushes to stop them.
Diggle discovers that his brother is one of Damien's Ghosts, and Oliver insists on trying to rescue him. Meanwhile, Damien offers Oliver a deal, and Ray contemplates his future now that he's back from the dead.moreless
Barry's confidence is crushed after Zoom cripples him, and Iris calls Henry in to help his son. Meanwhile, Grodd launches a new plan to gain others like himself, and Caitlin convinces Harrison to help them.moreless
Jane and Weller go undercover as a top-notch assassin couple in order to protect some lethal info. Meanwhile, David tries to repair his relationship with Patterson; and Carter and Mayfair disagree about how to deal with a menacing person.moreless
Kara's Thanksgiving may be ruined thanks to a tense visit from her foster mother, who seems to disapprove of her daughter's superhero role. There's also the matter of a volatile CatCo employee being transformed into the villainous Livewire to contend with over the holidays.moreless