A laboratory accident endows a police scientist with the ability to move at superhuman speed which he uses to battle a menacing gang as a superhero.

(This is part of the Arrowverse schedule - available at the $7 Premature Reaction Tier)

Nine years ago, Pierce was a hero of a different sort. Gifted with the superhuman power to harness and control electricity, he used those powers to keep his hometown streets safe as the masked vigilante Black Lightning, but he left the Superhero days behind. Almost a decade later, Pierce’s crime-fighting days are long behind him…or so he thought.

As the community struggles with the violence surrounding them, a glimmer of hope appears: Is Black Lightning back? Lynn Stewart, noticing the changes in the community, is also left wondering. While Jefferson Pierce struggles with his decision, Gambi urges him to take up the mantle once more and return to life as Black Lightning. Anissa and Jennifer try to deal with the aftermath of their jolting experience.

As Jefferson Pierce tries to determine if the community can survive without the help of Black Lightning, Anissa starts to come into her own. Meanwhile, Jefferson and Lynn try and figure out their new dynamic. Finally, Jennifer reveals to her parents that she has been grappling with something big.

Black Lightning is recruited to rally against The 100 gang. Anissa investigates the new drug hitting the streets. Meanwhile, familiar faces begin to reappear.

When the Legends realize that they broke the timeline, Rip Hunter arrives with his new organization - the Time Bureau - to relieve them of duty. The Legends are thrilled to get a chance to put the team back together but a new threat arises when Rory spots Julius Caesar in Aruba. Sara, Nate and Ray devise a plan to steal the Waverider back from the Time Bureau in order to try and stop Julius Caesar from conquering the modern world.

Oliver deals with the fallout of the explosion on the island.

Oliver tries to balance being the mayor, Green Arrow and a father to William. Anatoly returns to Star City with a deadly agenda.

A rogue black ops team led by Onyx breaks into Kord Industries and steals something lethal. Oliver struggles to connect with William so he reaches out to a surprising source for help.

An unexpected phone call unearths the long-buried need for Jefferson to investigate the murder of his father. Meanwhile, Annisa wrestles with the fact that her actions have dire consequences. Lastly, Jennifer learns the importance of controlling her temper.

Jefferson is on the hunt for his father’s killer, while Anissa uses her new powers to rectify a wrong after a protest fails. Jennifer grapples with some difficult choices. Elsewhere, Gambi begs for help from Lynn.

Black Lightning’s pursuit for Tobias continues. Anissa continues to find herself in the new normal.

Black Lightning works with Anissa to help find information to clear Black Lightning’s name. Jennifer begins interning for Lynn. Meanwhile, Gambi finds himself in a precarious situation.

Kara deals with the loss of Mon-El by focusing all her energy on being Supergirl and the mysterious new threat against National City. Alex confesses a secret to Maggie about their impending nuptials. A citizen of National City has a mysterious connection to Kara, and Lena Luthor makes a bold move.

Psi, a thief with psychic powers, attacks National City. Able to immobilize people by tapping into their worst fears, Psi proves a formidable opponent for Supergirl. Meanwhile, James Olsen and Lena Luthor are at an impasse, and Samantha starts her new job at L-Corp.

In the aftermath of the latest killing, Black Lightning works to clear his name while also hunting down the person responsible for his father’s death, and anyone else involved. Tensions remain high between Black Lightning and Gambi.

Black Lightning attempts to rescue several long-missing children reveals a secret he did not anticipate, and its resulting connections. Gambi struggles to stay strong while in a compromising position. Jefferson begins to view things differently.

As suspicions grow that Jefferson Pierce is Black Lightning, the ASA arranges to have him arrested. Lynn seeks help from Detecitve Henderson. Meanwhile, as Jefferson is in custody, Gambi and Anissa work together to show Black Lightning is still running around the streets of Freeland.

With Barry in the speed force, Iris, Kid Flash, Joe and Vibe have taken over protecting Central City. However, when a powerful armored villain threatens to level the city if The Flash doesn't appear, Cisco makes a risky decision to break Barry out of the speed force. However, the Barry that comes out isn't the same Barry that went in.

Barry has his hands full when he takes on a dangerous meta who can control technology, while also confronting an obstacle in his personal life; the ramifications of abandoning Iris for six months to balance the Speed Force. Meanwhile, Gypsy breaches in for a hot date with Cisco, but she gets annoyed when his work keeps them apart.

Barry and the team are hit by a string of bad luck and realize it is the handiwork of a new meta, Becky nicknamed Hazard, who has the ability to give others bad luck, while cashing in the benefits for herself. Meanwhile, Harry Wells returns to Earth-1 to give Wally a message from Jesse.

Cisco is shocked when Gypsy's father, Breacher, shows up on Earth-1. Breacher takes an immediate disliking to Cisco and decides to hunt him. Meanwhile, Barry runs into his old nemesis, Ralph Dibny.

The Legends find themselves in 1870 to fix the anachronism which happens to be at P.T. Barnum's fledgling circus. However, Nate and Ray accidentally free a saber toothed tiger, creating a bigger problem. Meanwhile, P.T. Barnum is on the hunt to capture Nate and Ray to make his show even more exciting for the crowd.

When Sara receives a distress call from their "befriended" agent at the Time Bureau, she learns that they have been tasked with going to the future to capture a rogue time traveler. Unfortunately, the Legends make things worse by trying to protect an outlaw named Zari, to hopefully lure in the time-traveling assassin. Meanwhile, Stein tries to diagnose Amaya's condition, but Nate discovers an unusual treatment that Amaya begrudgingly agrees to.

The Legends learn that Ray Palmer will die because they broke time, causing them to race back to 1988 to try and save his life. When they arrive, they are surprised to learn that young Ray Palmer has befriended a time-displaced baby Dominator putting him in harm's way with the government and the Dominator's mother. New to the ship and missions, Zari must find her place and learn to trust the team. Meanwhile, Stein begins working on a secret project on the ship which makes Rory and Jax suspicious.

When Nate thinks he has found a pattern to the anachronisms, it leads the Legends to London in 1897 to hunt down a time-traveling vampire. When they arrive in London, they run into Rip, but not everyone welcomes him back so quickly, leaving Sara to make a tough choice in the end. Amaya tries to connect with Zari, but she is still struggling with being part of the team. Meanwhile, Stein discovers what Ray and Jax are up to and is not entirely pleased.

Eliza throws Alex and Maggie a wedding shower, which causes Maggie to reach out to her estranged father. Supergirl joins J'onn on a personal mission.

Kara investigates a secretive new group whose leader, Thomas Coville, has a mysterious connection to Supergirl. Meanwhile, Samantha feels like she's letting Ruby down, and J'onn confesses an old secret.

When multiple children get sick from lead poisoning, Morgan Edge points the finger at Lena and blames her creation of the lead bomb she made to save National City from the Daxamites. While Lena knows she never intended any harm, she fears there may have been a flaw in her design, leaving her responsible. Kara teams up with Samantha to clear Lena's name, but it turns out to be harder than they thought. Meanwhile, Alex and Maggie make a crucial decision about the future of their relationship.

Kara and Alex head home to Midvale for a little R&R. While there, Kara recalls a painful memory of a childhood friend's death and how that traumatic experience brought the Danvers sisters closer together.

Just as Oliver starts to get things in order, Black Siren launches another attack on the citizens of Star City.

Having received an ominous threat from her old boss, Amunet, Caitlin fears that her past time as Killer Frost may be back to haunt her. Felicity comes to Central City to help the girls celebrate Iris's bachelorette party, while Cisco, Joe and the guys take Barry out for a night on the town.

Tobias returns to Freeland. He is tasked to capture - not kill - Black Lightning with the help of an unexpected source. After a battle of epic proportions, Anissa and Jennifer provide surprising aid.

The aftermath of the showdown with Black Lightning leaves everyone reeling. Meanwhile, Tobias gathers his forces.

Slade returns and asks Oliver for help in tracking down his son. When they learn Joe has been taken hostage by mercenaries, their mission to save him gets complicated by a terrible revelation that could shatter Slade's hopes of reunion forever. Meanwhile, Vigilante reappears in Star City.

As Slade continues to uncover clues about his son's last few years, Oliver makes a big decision. Meanwhile, Green Arrow leads the team into battle against "The Dragon", a villain who is stealing valuable tech in Star City.

Jefferson Pierce and his family may have survived Tobias’s attack, but they’re not out of the woods yet. Concerned for the safety of Garfield’s students, the board considers a motion to shut down the school, forcing Jefferson to go to Napier Frank to sway the vote. Jennifer struggles with her powers and her actions have unforeseen repercussions

Jefferson must break the news to his students and faculty that he is stepping down. Struggling with his new life as Painkiller, Khalil pays a visit to Jennifer in hopes of mending things. Meanwhile, Tobias continues to enact his plan.

Jefferson is forced to watch as all his good work is undone before his eyes when his replacement arrives and begins implementing sweeping changes. Meanwhile, Anissa continues to play Robin Hood by stealing from one of the most powerful crime syndicates in Freeland.

Jefferson confronts Anissa about her reckless and irresponsible behavior leading to a fierce disagreement.

When the Legends track down an anachronism in 1930s Hollywood, they discover it's none other than a time-displaced Helen of Troy and she's just started a war between two film studios. As the Legends try to fix history and return Helen to the Bronze Age, things get complicated when they are blindsided by the appearance of a former enemy. Sara contemplates an offer she is made, which would make the Legends leave the anachronisms be. Meanwhile, Stein and Jax find themselves in an unusual predicament.

With Sara out of commission, the team finds a new Anachronism that leads them to the jungles of Vietnam and right in the middle of the war. Ray, Amaya, and Zari pose as journalists and trek through the jungle when they are lead to time-displaced Gorilla Grodd. Meanwhile, Nate and Rory run into someone Rory knows which give a glimpse into his past.

When Winn and the team discover an alien ship has crash landed deep underwater beneath National City, Kara/Supergirl is called in to investigate. Meanwhile, Hank attempts to bond with his father, Myr’nn. Samantha, eager for some understanding of the changes she has been experiencing, looks to her estranged mother, Patricia Arias, for answers.

Oliver celebrates Thanksgiving with his family but the happy moment is interrupted. Meanwhile, Black Siren returns to wreak havoc on the holiday.

When collectors of Native American artifacts are attacked by a meta named Mina Chayton who can bring inanimate objects to life, Barry turns to a surprising ally for help. Determined to crack the identity of The Thinker, Harry enlists Cisco’s help to summon the ultimate think tank; "The Council of Wells", a roundtable of the brightest Harrison Wells’ from various Earths.

Barry comes face to face with DeVoe. DeVoe's past is revealed through flashbacks. Meanwhile, Iris puts the final touches on the wedding, which is a week away.

A Nazi regime rules the parallel world of Earth-X. On Earth-1, Barry Allen and Iris West's friends, including Kara Danvers and Alex Danvers from Earth-38, come to Central City for Barry and Iris's wedding. Oliver Queen re-proposes to Felicity Smoak. The wedding ceremony is interrupted by invaders from Earth-X led by Dark Arrow, a Kryptonian called Overgirl, and the Earth-X analog of Prometheus. 

In S.T.A.R. Labs, a captured inter-dimensional villain from Earth-X, Prometheus, is revealed to be a parallel universe doppelgänger of Tommy Merlyn. After he cruelly taunts Oliver over his attachment to Earth-1's Tommy. Prometheus's partners, Dark Arrow, Overgirl, and Eobard Thawne steal a sublight generator, the Prism, from research company Dayton Optical Systems; Oliver, Barry Allen, Kara, and the others believe that Dark Arrow seeks to build a neutron bomb with it to aid in his conquest of Earth-1. Oliver, Barry, and his allies are abducted to Earth-X's concentration camp, but Kara is moved to S.T.A.R. Labs. 

In the concentration camp, the heroes are rescued from execution at the hands of SS-Sturmbannführer Quentin Lance by Ray Terrill and Leo Snart, Leonard Snart's doppelgänger. Thawne prepares to operate on both Overgirl and Kara, and Iris and Felicity work to rescue their friends at S.T.A.R. Labs. General Winn Schott, the commander of the Freedom Fighters, is determined to strand Dark Arrow and Overgirl on Earth-1 by destroying the temporal gateway. While posing as Dark Arrow, Oliver discovers that the Nazis possess a doomsday device in the form of a timeship called Wellenreiter, a militarized equivalent of the Legends' Waverider. 

The heroes return to Earth-1, and Iris, Felicity, Kara, and the others are rescued by the returned heroes and the Waverider crew. Martin uses the serum to separate the Firestorm matrix, dying from his wounds. Harry, at the helm of the Waverider, destroys the Wellenreiter after the heroes disable its shield. During battle with Kara, Overgirl's solar radiation goes nuclear.

EPISODE 1: The Freedom Fighters, comprised of The Ray, Black Condor, Phantom Lady, Red Tornado, Dollman, and Blitzkrieg fight to rescue refugees from the New Reich on Earth-X.

EPISODE 2: Overgirl, Black Arrow and Dark Flash engage in the battle with the Freedom Fighters on Earth-X in an attempt to obtain Red Tornado's neural cortex.

EPISODE 3: The Ray lands on Earth-1 and transfers his powers to his doppelgänger, Ray Terrill.

EPISODE 4: Ray and John learns about Earth-X and discovers his new powers. Meanwhile, Overgirl, Black Arrow and Dark Flash search for the Freedom Fighters and Red Tornado's neural cortex.

EPISODE 5: Ray tests out his newfound powers, while S.T.A.R. Labs detects a breacher in Oklahoma.

EPISODE 6: Ray acts as a superhero on Earth-1. Meanwhile, on Earth-X, Vibe searches for the Ray.

EPISODE 1: Barry, Cisco, Oliver and Curtis recruit Ray as a crime-fighter. He is thrown into the thick of things when Mari McCabe (a.k.a. Vixen) seeks their assistance in defeating a giant robot attacking Detroit.

EPISODE 2: Ray proves instrumental in defeating the giant robot. Oliver offers to train him. After he returns home, his house is attacked by Overgirl, who steals the Red Tornado's cerebral cortex from him.

EPISODE 3: After being attacked by Overgirl, Ray tells his parents that he has to go away for a while. He comes out to them and they are accepting of his sexuality. Ray has Cisco send him to Earth-X.

EPISODE 4: On Earth-X, Ray contacts the Resistance in the ruined New York City. Phantom Lady and Black Condor mistake him for his counterpart from their Earth. Ray offers to help them fight the New Reichsmen and retake the cortex from Overgirl.

EPISODE 5: Ray, Cisco, Phantom Lady, Black Condor and the Resistance are faced with an attack by Overgirl, Black Arrow, Blitzkrieg and the New Reichsmen.

EPISODE 6: Ray finds the strength and willpower to defeat Overgirl. He opts to stay on Earth-X to assist in the fight against the Reichsmen.

Jefferson and Anissa work together investigating the hometown of a creepy man at the clinic and make a shocking discovery. Meanwhile, with Syonide gone, Tobias puts an increasing amount of pressure on Khalil to help fill some of the void left in the organization.

Black Lightning and Thunder return to South Freeland in an attempt to figure out what is going on. When they arrive, they are directed to a nearby wood where they are surrounded by a clan of mixed-race moonshiners called the Perdi. Meanwhile, Lynn, feeling tremendous guilt, falls into a deep depression. Lastly, Tobias finds that his plan is falling apart.

Quentin Lance is kidnapped by Black Siren and Cayden James, who are looking to trade Quentin's life for a weapon of mass destruction. Oliver and Team Green Arrow must figure out a way to save Lance while still keeping the city safe.

Amunet kidnaps Caitlin and puts meta-dampener handcuffs on her to keep her from turning into Killer Frost. Amunet tells Caitlin she needs her to perform a tricky medical task and if Caitlin fails, Amunet will kill her. Meanwhile, The Thinker traps The Flash in a speedster-proof prison. With the clock ticking, The Team doesn't have the time or resources to track both Caitlin and Barry so Iris is forced to choose who to save.

When Black Lightning and Thunder are attacked by Looker and her clan, they fight to get her to release control over the Sange. Meanwhile, Jennifer and Khalil continue to grow closer.

Rattled by recent events, the Legends dive into work which finds them investigating an Anachronism in a Viking settlement in the New World. The Legends realize that the Norsemen are worshipping an artifact as their god and are surprised by the artifact's origin. For the first time, Sara is worried that they might need back up when Damien Darhk shows up. Meanwhile, Jax finds a loophole that could potentially change history, but it is a risk he is willing to take.

After Sara's encounter with Mallus, the Legends are paid a visit by John Constantine, a demonologist detective. The Legends agree to accompany him to a present-day psychiatric hospital and they are surprised to discover who Constantine is trying to help. During the exorcism, Sara, Leo and Constantine go missing, leaving Ray and Zari to try to take care of Constantine's client. Meanwhile, Amaya and Nate once again come face to face with Kuasa.

Supergirl investigates a mysterious symbol popping up all over National City, tracing its origins back to an ancient prophecy and the mark of the World Killer, Reign. Meanwhile, the tension between Lena and Morgan Edge continues to build, causing James to step in and offer up some protection, and possibly igniting a spark in the process.

Struggling to heal from her injuries inflicted by Reign, Supergirl remains in a dreamlike state, unable to be reached. Mon-El recruits one of The Legion members, Brainiac-5, to try to bring her back. Meanwhile, Reign continues her rampage on the city so the DEO teams up with the Legion of Superheroes to try to stop her.

As Reign continues to terrorize the city, Supergirl teams up with Saturn Girl, and the two recruit Supergirl's former enemies, Livewire and Psi, to form a team for a mission to Fort Rozz to recover a prisoner who has information on how to defeat Reign once and for all. Meanwhile, Alex babysits Ruby.

The Pierce family is reeling in the wake of Jennifer's disappearance. Jefferson, Lynn and Anissa all gather to discuss the most effective way to find her. Lynn goes to Detective Henderson to ask him to issue a warrant for Khalil's arrest. Meanwhile, Jennifer and Khalil are doing their best to stay off the grid but Tobias's new henchwoman Cutter is closing in on them.

After Jennifer and Khalil escape, they take refuge in a barn and Jennifer desperately tries to save a now feverish Khalil, who has grown worse from Cutter's poisonous blade. Meanwhile, Jefferson, Lynn and Anissa try everything they can to track down Jennifer and Khalil.

As Barry's trial for the murder of Clifford DeVoe begins, Iris and Joe must decide how far they are willing to go to keep Barry out of prison.

When a familiar villain returns to terrorize Central City, Ralph must rise up to defend the innocent while Barry is detained by his trial. Meanwhile, Barry searches for the strength to keep his optimism alive in the face of his new circumstances.

Despite losing half his team, Oliver remains confident that he, Felicity and Diggle can stop Cayden James and Black Siren. However, when he discovers one of Cayden's secrets, he decides to team up with an unlikely ally. Meanwhile, Dinah spends time with Vince.

Cayden James ups the ante by launching his plan to take control of every aspect of the city. Despite the scope of Cayden's plan, Oliver is determined to foil it with just the Original Team Arrow - and without the aid of Rene, Dinah or Curtis. But things get complicated when William is endangered as a result of Cayden's handiwork.

After the team returns from a mission, Zari finds herself trapped in a time loop that results in the Waverider blowing up over and over again. Zari soon begins to suspect that the answer to stop what is happening might lie hidden among her fellow shipmates’ secrets. But in investigating them she starts to understand her place on the team.

When Sara decides to take some private time, the Legends pursue a lead on the whereabouts of the long-lost Earth Totem. Without Sara's knowledge, the Legends find themselves in 1717 to hunt for Blackbeard’s long-lost treasure, but in true Legends fashion things go awry. Meanwhile, Ray feels guilty about something he has done and tries to make amends, which lands him in even bigger trouble.

When Damien and Nora Darhk take Ray hostage they force him to try and fix the Fire Totem, but Ray tries to use the power struggle between them to his advantage. Ray and Nora find themselves working together in 1960's East Germany in order to fix the totem, but soon come face to face with a younger and deadlier version of Damien Dahrk. Meanwhile, Sara seems to be taking positive steps in her personal life.

Someone tries to kill Morgan Edge and he barely survives. He accuses Lena of being behind the attempt and vows to destroy her. When Lena fears her hatred for Morgan will take her to the Luthor dark side, Kara steps in to help her friend. Meanwhile, after Sam realizes she's losing time, she confides in Alex who decides to run some medical tests to see if she can find out what's going on with her new friend.

The DEO captures a second World killer, Purity. Supergirl and Alex use very different methods of interrogation with Purity in the hopes of finding out how to defeat Reign. However, Purity escapes and attacks the city's subway tunnels. Meanwhile, J'onn, Winn and Mon-El band together to fix the Legion ship.

A meta who can shrink anything he touches battles Team Flash. Cisco and Ralph get caught in his crossfire and are shrunk to miniature versions of themselves. Cecile realizes her pregnancy has caused her to have temporary powers and discovers she can hear other people's thoughts, which unnerves Joe. Meanwhile, Barry meets someone with a mysterious connection to Henry Allen.

After hearing that Amunet has struck a deal to buy all of the metahumans in Iron Heights, Barry must decide if he should expose his powers in order to save his cellmates. After a visit from an old friend, Ralph is reminded of his shady past and wonders if he's really a changed man.

Oliver continues his battle with Cayden James. Dinah and Oliver have a major disagreement that endangers the life of one of their own.

Cayden James discovers a secret about Green Arrow that pushes him over the edge. Knowing everyone and everything he loves is in danger, Oliver must decide if he can do this alone or if he needs to turn to his old teammates for help. William starts to demand more of Oliver's time.

Oliver, Diggle and Felicity disagree with Dinah, Curtis and Rene on how to handle Black Siren. The two teams face off and a fight ensues.

When Winn's father dies, his estranged mother, Mary, reappears trying to reconnect and to explain why she abandoned him all those years ago. Winn is too embittered from his rough childhood to forgive her but when a copycat Toymam attacks, the two must work together to stop him. Mon-El tells Kara something important about the Worldkillers, and Alex becomes suspicious of M'yrnn's recent behavior.

M'yrnn inadvertently causes psychic disturbances at the DEO; Supergirl must work with J'onn to contain the chaos; Mon-El begins training Kara in fighting techniques he's learned in the future.

Supergirl and Imra have different ideas on how to stop the third world killer, Pestilence. However, when both Alex and Winn are seriously injured by Pestilence, Supergirl and Imra team up to stop the destruction.

Still reeling after learning about Lena's secret, Supergirl asks Guardian for a favor that could alter his relationship with Lena forever. Meanwhile, with all three Worldkillers united, Supergirl and the team brace for an epic battle.

Barry meets a powerful woman whose abilities could help him in his battle with DeVoe. Meanwhile, after learning that DeVoe is targeting everyone who was on the bus, Ralph decides he doesn't want to be a hero anymore, his only concern is staying alive. Harry offers to help Joe.

When the Legends learn that a mysterious tragedy destroyed Memphis in 1954, thus eradicating the birthplace of rock and roll, they embark on their most important mission – to save music. Nate is excited to show Amaya why music is important to him and he is surprised it leads to a rock legend as well as the sixth and final totem, the Death Totem. Meanwhile, Zari helps their newest member try to adjust to the team.

When Mallus’ power over Sara resurfaces, she unwittingly becomes the bearer of one of the Totems. Rory must conquer his dark side in order to wield his own Totem power to help save the crew. Meanwhile, Agent Sharpe notices that something is wrong and recruits someone unorthodox to help.

When Ava disappears, Sara and Ray set out to find her after some prodding from Time Bureau agent Gary and a disturbing truth about Ava. Amaya tasks Zari with helping train Rory in controlling his own Totem power. Meanwhile, Nate and Wally set out on a mission that goes awry when they pair with an unlikely person to try and get a Totem.

Still on the run, Jennifer and Khalil succumb to their feelings for one another and begin planning their future together. Meanwhile, Jefferson approaches Henderson with a favor.

Jefferson suspects that Tobias is behind a recent malicious attack. He brings this news to Henderson but doesn't get the answer he was looking for. Meanwhile, Lynn is confronted by her past.

When Anissa returns to work at the clinic, she meets a domestic violence victim who motivates her to take action. Meanwhile, Gambi makes a discovery.

Oliver and Thea are shocked to hear that Roy Harper is back in Star City. However, when they discover the circumstances of Roy's return, Oliver and Thea realize that Roy is in trouble and jump in to save him. Black Siren makes a shocking decision.

Nyssa al Ghul returns to Star City to warn Thea that a group of renegade League of Assassins members are planning to attack her. This group, led by Athena, is intent on finding a mysterious box that Malcolm left behind and will stop at nothing to get it. Nyssa helps Oliver come to a life-changing realization.

When a nuclear bomb detonates in downtown Central City, Barry, Jesse Quick and Jay Garrick slow down time by entering Flashtime. As everyone in the city is frozen, the three speedsters push themselves to the breaking point to save the city and everyone in it.

Team Flash confronts a new bus meta, Matthew AKA Melting Point, with the ability to swap people's DNA. During a battle with Team Flash, Matthew transfers Barry's super speed to Iris. Now, with a new threat unleashed on Central City, Barry must act as the team leader while Iris takes on the mantle of superhero speedster in order to defeat their new foe.

Lynn works on two of the pod kids in a segregated safe room. Meanwhile, Jennifer plots revenge and Jefferson receives some interesting news. Lastly, Anissa makes a shocking discovery.

Looking for answers, a worried Anissa sets out to find Grace.

When Reign starts hunting Ruby, Supergirl and Alex work together to keep her safe. Supergirl and J'onn look to Sam's mother for advice on how to stop Reign and come away with some shocking news.

When Tanya, a disciple of Coville's, escapes from what's left of his cult, she gives Kara and James a journal that could hold the key to saving Sam. Someone learns Guardian's identity and threatens to expose James if he doesn't do what they ask. James contemplates what it means to be a black vigilante without a mask in America.

Supergirl is stunned to discover that a part of Krypton survived. Meanwhile, Alex is attacked while out with Ruby, and Lena considers how far she will go to keep Reign contained.

Oliver and Diggle face their biggest challenge yet. Curtis is disappointed to find out his new boyfriend has a firm anti-vigilante stance.

In his darkest place yet, Oliver wonders if he has failed at everything – being a father, a mayor and a hero. His frustration rising, Oliver lashes out at Felicity and William. A surprising visit from an old friend has Oliver questioning his next move.

Lynn counsels former pod kid, Wendy, in how to live in a world that's new to her but the fate of the other pod kids remains in doubt. Meanwhile, Anissa figures out Grace's secret. Lastly, Jefferson tries to install a superhero code for his metahuman offspring, but Jennifer insists on taking revenge on Tobias for her boyfriend's death.

Lynn goes head to head with Dr. Jace once and for all. Gambi risks his life to save Jennifer. Tobias makes a major move to cripple Freeland and kill Black Lightning, requiring our superhero family to step up like never before.

With the timeline barely stable, the Legends must tackle two anachronisms at the same time to try and keep Mallus at bay. Sara and Rip team up to stop Grodd from going after a particular target leaving Nate and Wally to stop Amaya from changing her future. Meanwhile, the Legends think they have found a way to destroy Mallus, but they will have to create an uneasy alliance with one of their enemies.

The Legends plan to vanquish Mallus by using the totems doesn't go as planned, forcing Rip to improvise. The team finds itself regrouping in the Wild West where they run into their old pal Jonah Hex. Sara leaves Ray in charge of watching Damien Darhk, while she comes up with a new plan. Meanwhile, Amaya is determined to find a way to use the totems to destroy Mallus.

Barry and Ralph take different approaches to finding the remaining bus metas before DeVoe gets to them. However, Ralph's cavalier attitude frustrates Barry and the two clash over what it means to be a hero. Meanwhile, Breacher returns to ask Cisco for a favor.

When Barry and Team Flash find a way to enter the Thinker's lair, Ralph considers crossing a dangerous line to defeat DeVoe. Meanwhile, Joe is concerned by Harry’s recent behavior.

When Barry needs help transporting a dangerous meta, he calls on a new friend for help - Citizen Cold; Cisco becomes suspicious of Harry.

Barry and Team Flash team up with Gypsy to try to thwart the Thinker's plan. Meanwhile, Cisco and Gypsy have a heart to heart talk about their relationship.

Looking to expand his empire, Diaz and Laurel meet with the Quadrant, a coalition of mafia families who run national organized crime. Meanwhile, after Oliver's recent decision, Felicity and Curtis double their efforts on building Helix Dynamics.

Kara makes a major life decision. Meanwhile, J'onn finds out that special DEO-caliber guns have hit the streets of National City.

After learning the true depth of Selena's nefarious plans for Earth, Supergirl, Mon-El and Alura must come up with a plan to stop her. J'onn prepares to say goodbye to his father.

Supergirl and team take on Selena in an epic battle for Earth.

With DeVoe's Enlightenment device nearly complete, in order to disable it the Flash and his team must put their faith in an unlikely ally - Amunet Black. Meanwhile, Harry hits an all-time low when the "Council of Wells" kicks him out but then Cisco introduces him to the "Council of Harrisons".

When DeVoe assaults an A.R.G.U.S. facility to complete his Enlightenment Machine, Barry realizes the only way he can stop him is if he allows Cisco and Caitlin to accompany him into the facility. Still shaken by Ralph's death, Barry isn't sure he wants to risk any more of his friends' lives and considers taking on DeVoe solo.

Team Flash gets help from a surprising ally in their battle against DeVoe.

Oliver turns to an old friend to help battle Diaz; Rene is out of the hospital but has a hard time readjusting to life as Wild Dog; Lance discovers something shocking about Black Siren.

The pressure mounts for Oliver who begins to wonder if he will lose everything in his battle to save Star City. A familiar face returns.

Diaz targets Team Arrow and their loved ones. Oliver struggles with Felicity putting herself in danger when she gets the chance to stop Diaz for good.

With a new ally on his team, Oliver engages Diaz in an epic final battle.