Supergirl Show Summary, Upcoming Episodes and TV Guide

Supergirl realizes that in order to stop Lex and Leviathan she must work with the one person she never thought she'd trust again - Lena. Nia keeps dreaming about Brainy but struggles with what the dreams are trying to tell her. Meanwhile, Brainy realizes there is only one way to stop Lex.

Lex proceeds to lay an intricate plan to bring Lena closer to him, defeat Leviathan's latest attack, and pit Supergirl against Leviathan; how Lex came into power after Crisis is revealed.

Nia's roommate, Yvette, is attacked by a man targeting Dreamer because he doesn't like that Dreamer is transgender and wants her to quit being a superhero. Determined to protect her community from additional harm, Dreamer refuses to give into his threats and puts herself in the line of fire to stop him. Supergirl stands by Dreamer and enlists additional help from Brainy. Meanwhile, Alex, J'onn and Kelly attempt to rescue a man stuck inside a virtual reality escape room.

Mxyzptlk returns with a proposition for Kara – what if she could go back in time and tell Lena her secret before Lex did, would things turn out different? Looking back over key moments throughout the series, Kara must decide if she wants to change history to become friends with Lena again.

As Supergirl tries to thwart a Toyman copycat, Winn Schott returns from the future.

Harbinger gathers the greatest heroes of several worlds to battle the Anti-Monitor, his shadow demons, and the anti-matter wave that is sweeping across the multi-verse. While Lois, Brainiac-5, and White Canary search for Kal and Lois' missing son Jonathan, Alex asks for Lena's help evacuating Earth-38's population before it's too late.

Leviathan's leader comes after Lena to get the medallion, and Lena convinces Supergirl to take her to the Fortress to find a weapon capable of stopping him. Kelly makes a confession to Alex, and John reaches out to his brother.

On the eve of the worldwide launch of Andrea Rojas's VR contact lenses, Kara and William team up on an investigation that exposes a terrorist plot. Kelly and Alex celebrate an anniversary, but Alex's safety is in jeopardy.

Kara meets with Lena for the first time since she admitted her secret identity to her. J'onn recruits Nia to help him dwell further into his memories, and Nia deals with her relationship with Querl. An old friend visits Kelly and asks for help with his memories, but he isn't what he seems.

Kara prepares to accept a Pulitzer for her writing, and comes to a decision about sharing her secret identity with Lena. A new villainess and former foe emerges from the Phantom Zone to fight John, and Lena sells CatCo to an associate who has big changes in store for the organization.

Lex's plan reaches fruition: Red Daughter has defeated Supergirl, Lex has defeated the Kaznians and then Red Daughter. Now only one thing can stop him: the power of the Fourth Estate.

Kara and Lena track Lex to Kaznia, and find Eve but no Lex. Ben abandons his son to go after his wife's killer, which pits him against Brainiac-5, Dreamer, and the newly superpowered James. Alex and Kelly travel to meet with a woman giving birth to a child who could become Alex's.

Supergirl and Lena go to Stryker's Island to check out Lex's cell, and find a clue to his schemes. Supergirl is declared a criminal and is forced to question whether she does more harm or good, while James deals with the fallout from being injected with the serum.

Lex spends three years plotting his next scheme, working with the Kaznian government to train the Supergirl clone to further their ambitions against America so that he can step in and stop them, becoming a hero to the world and its savior.

Ben proposes to end the Alien Amnesty Act and holds a rally. Alien protesters hold a peaceful march, but Manchester plans to disrupt the event using stolen Kryptonian technology... and reveal J'onn's true feelings. James goes to the rally to cover events as a photographer.

Kara continues to deal with the fallout from Alex's mindwipe, and a new villain enters National City: Menagerie, a human jewel thief merged with an alien symbiote. Nia invites Brainiac-5 to her Valentine's Day party, and Ben reaches out to his wife and son.

Supergirl finds a ship full of dead SEAL soldiers, and discovers that it's connected to Haley and the US government. Brainiac-5 sets up a meeting—at a romantic restaurant—with Nia to discuss her future as a possible superhero, and Lena tells James what she's been working on.

Manchester learns Agent Liberty's secret identity and goes to obtain vengeance for Fiona's death. Nia has a prophetic dream, and Kara and Brainiac-5 help her to avoid the future that she has foreseen.

As the Thanksgiving holiday approaches, the Children of Liberty prepare a new initiative to wipe out the aliens among them. James and Lena have their first major argument, and Nia displays narcolepsy but refuses help.

To heal Supergirl, Alex assigns Brainiac-5 and Lena to find a way to remove the Kryptonite from Earth's atmosphere. Meanwhile, Mercy and Otis abduct aliens from a DEO facility and use them to attack children and spread fear, and Hank meets an ally in his fight.

The U.S. people are shaken by the revelation that the President is an alien. As Supergirl tries to quell the unrest, Nia tells James that he should write an editorial supporting aliens. Meanwhile, Mercy launches an attack on L-Corp to shut down the image inducers and reveal the aliens for who they really are.

The heroes must come up with a way to defeat Reign without killing her. Afterward, Winn and Alex get job offers, Mon-El and Hank make decisions about their personal lives, and James has a news story for the world.

Kara and Mon-El return to Argo City, but not all is as it seems. Meanwhile, in Supergirl's absence, Guardian and the DEO deal with a dangerous gunman wielding DEO weaponry.

Followers of Coville plan to use his journal to create a new Worldkiller. Meanwhile, Supergirl tries to repair the rift between her and Lena, and James is forced to consider whether to out himself or not.

Supergirl discovers that she has a mental link to Sam and Julia, and takes Lena and Alex with her to rescue them. Meanwhile, James faces a tough decision when he must decide whether to investigate Lena or not after she kept Reign's existence a secret.

M'yrnn tries to redirect his mental processes and ends up infecting the DEO with a telepathic rage virus. Meanwhile, Lena tries to convince Sam that the latter transforms into Reign during her blackouts.

The DEO easily captures Julia Freeman, the second Worldkiller Purity's body. While Supergirl and Alex try to get through to her, Mon-El asks Hank for his help repairing the Legion Cruiser.

Supergirl and Saturn Girl are forced to recruit two female metas to find a prisoner on Fort Rozz, which is orbiting a sun that emits radiation fatal to males. Meanwhile, Alex babysits Ruby while Sam goes on a work trip.

Supergirl learns that a mysterious Kryptonian symbol suddenly appearing around the city heralds the appearance of the World Killer, Reign. She's a Kryptonian whose powers exceed Supergirl's... and who is determined to bring judgment to a sinful world. The tension between Lena and Morgan Edge continues to build.

The DEO rescues Mon-El from a spaceship buried in 12,000 years of rock, but Mon-El remains strangely silent about how he got there. Meanwhile, Hank takes M'yrnn to the park, and Sam goes to her mother Patricia for answers about her birth.

Morgan accuses Lena of poisoning the children of National City with the lead bomb she used to drive off the Daxamites. Kara and Sam work to clear their friend's name. Meanwhile, Maggie and Alex break up.

Supergirl goes with Hank to Mars in response to M'gann's telepathic request for help. Meanwhile, Maggie invites her estranged father Oscar to her and Alex's wedding shower that's sponsored by Eliza.

After losing Mon-El, Kara decides to give up her human life and dedicate herself full-time to being Supergirl. Meanwhile, a new menace threatens National City, and real estate mogul Morgan Edge makes a bid to buy up CatCo. Also, Alex confesses a secret to Maggie, a citizen of National City has a mysterious connection to Kara, and Lena makes a bold move.

Alex takes over as Acting Director of the DEO as the Daxamites take over National City, open fire on Air Force One, and recruit a familiar face to their side. Meanwhile, Cat Grant returns to National City to inspire Supergirl and the populace.

A man abducts Alex and threatens to kill her unless Kara helps a supermax prisoner escape... and the abductor knows that Kara is Supergirl. Meanwhile, Rhea approaches Lena with an offer.

Someone hires bounty hunters to kill Supergirl, and Mon-El believes that his parents are responsible. Meanwhile, Maggie and Alex run into Maggie's old girlfriend, and President Marsdin gives express orders to Hank not to attack the Daxamites.

Alex refuses to obey Hank's orders to stand down and sets out to find Cadmus and protect Jeremiah. Meanwhile, Kara takes drastic steps when Snapper refuses to publish her story intended to protect the remaining aliens on Earth from Cadmus.

It's Valentine's Day, and Kara finds herself dealing with the amorous advances of Mxyzptlk, a fifth-dimensional being with unlimited magical powers. Meanwhile, Alex discovers that Maggie hates Valentine's Day, while an alien woman hits on Winn.

M'gann's White Martian mate Armek comes to Earth to bring her back to face justice for her 'treachery' When she takes refuge in the DEO, Armek infiltrates the building and uses his shapeshifting powers to spread confusion.

When a girl disappears, Kara discovers a pattern of missing people and goes looking with Mon-El... and they both end up on an alien planet under a red sun which renders them powerless. Meanwhile, Winn has a brush with death, and Alex and Maggie have their first disagreement.

While Cadmus captures Supegirl and Mon-El, Guardian and Winn go after a murderous vigilante that is letting Guardian take the blame for his murders. Meanwhile, Alex and Maggie have issues.

Cadmus provides a gang of crooks with alien weaponry in an attempt to spread fear and panic among the populace. Meanwhile, Kara tries to mentor Mon-El with minimal success, and James decides that he wants to be a superhero.

Supergirl and the DEO are called on to protect the President when she comes to National City to sign her Alien Amnesty Act. However, a hostile alien threatens to kill the President and anyone who gets in its way. Meanwhile, Alex meets Maggie Sawyer, a detective with the NCPD's science division, and Snapper challenges James' authority.

After a seemingly Kryptonian pod crashes in National City, Superman comes to visit his cousin. While the two of them try to determine if Lena Luthor--Lex's sister--is up to no good, Kara wrestles with her personal life.

Kara must find a way to free her friends when Non and Indigo use mind control to turn National City's citizens into their own army.

A captive Hank tells the U.S government how he came to lead the DEO, but receives a less than sympathetic ear. Meanwhile, Kara reveals her identity to someone close to the investigation, and Siobhan plans revenge Kara for getting her fired from CatCo.

A new enemy emerges to threaten Supergirl and National City... and has a connection to Krypton. Meanwhile, Lucy demands the truth from James, and Kara continues refusing to work with Hank, unaware that Alex is the one who killed Astra.

Supergirl is ensnared by an alien plant that forces her into her deepest desire, and her friends and sister must free her before it's too late. Meanwhile, the Kryptonians launch their plan to bring humanity to its knees and save Earth.

Kara must help Hank face his painful past when a White Martian, a member of the alien race that wiped out his people, kidnaps Senator Miranda Crane, an anti-alien politician. Also, Cat's estranged son, Adam, arrives in National City.

Supergirl tries to convince her aunt to help them recover Hank from the Kryptonians and is forced to rely on blind faith. Meanwhile, Max continues his campaign to bring down Supergirl, and Kara tries to convince Cat that she and Supergirl are not one and the same.

Kara is still without her powers when an earthquake rocks National City. Now she and her friends must rise to the occasion. Meanwhile, the DEO's attempts to restrain an escaped prisoner are threatened by Alex's mistrust of Hank after she learns of his role in Jeremiah's death.

Kara finds herself juggling her personal and public lives when she offers to take care of Cat's son Carter, deal with James' relationship with Lucy, and try to stop a bomber who is targeting Maxtech properties.

Supergirl faces her first non-alien nemesis when one of her cousin's enemies--the nuclear-powered Reactron--comes looking to kill her. Meanwhile, Cat runs a derogatory exposé on Supergirl after interviewing the superhero.

Twenty-four-year-old Kara Zor-El, cousin of Superman, who was taken in by the Danvers family when she was 12 after being sent away from Krypton, must learn to embrace her powers after previously hiding them.