After 12 years of keeping her powers a secret on Earth, Kara Zor-El, Superman's cousin, decides to f...

When Kara’s attempts to help National City don't go according to plan, she must put aside the doubts...

Supergirl’s powers are tested when Reactron, one of Superman’s formidable enemies, arrives in Nation...

Kara's Thanksgiving may be ruined when she suspects her foster mother, Dr. Danvers, who is coming to...

Kara’s two identities are stretched thin when Supergirl must protect National City from a series of...

Personal and professional stress get the better of Kara when she goes too far during a training exer...

Kara and her friends must rely on their inner strength and courage when an earthquake strikes Nation...

Kara goes toe-to-toe with Astra when her aunt challenges Kara’s beliefs about her mother. Also, Cat...

With Astra in captivity at the DEO, her husband, Non, captures Hank, leading to a tense standoff bet...

Kara does her best to support Winn when his father, the supervillain Toyman, breaks out of prison an...

Kara must help Hank face his painful past when a White Martian, a member of the alien race that wipe...

Kara faces off against her mirror image when Bizarro, a twisted version of Supergirl, sets out to de...

Kara’s friends must find a way to save her life when a parasitic alien attaches itself to her and tr...

Supergirl does battle with the deadly Master Jailer, who is hunting and executing escaped Fort Rozz...

Kara travels to Superman’s Fortress of Solitude in hopes of learning how to defeat Indigo, a dangero...

Kara turns on her friends and the citizens of National City after being exposed to Red Kryptonite ma...

J'onn J'onzz reveals the details of meeting Kara and Alex's father, Dr. Jeremiah Danvers, and assum...

Kara gains a new ally when the lightning-fast superhero The Flash suddenly appears from an alternate...

Kara must find a way to free her friends when Non and Indigo use mind control to turn National City’...

Supergirl is forced to do battle with an unexpected foe and must risk everything – including her lif...

When a new threat emerges in National City, Kara/Supergirl teams up with her cousin, Clark Kent/Supe...

CADMUS attacks National City with a Kryptonite-powered villain who ends up seriously hurting Supergi...

An attack is made on the President as hot-button, alien vs. human rights issues heat up in National...

When Kara and Alex investigate the murder of an unregistered alien, the trail leads to an alien figh...

Supergirl must beat a ruthless new gang who has been armed with dangerous new alien technology. When...

The Guardian debuts to lend a hand after a parasite alien drains Supergirl of her power. Mon-El cons...

While Guardian tries to clear his name after being accused of a murder committed by another vigilant...

Eliza comes to town to celebrate Thanksgiving with her daughters. Alex decides it’s time to come out...

Kara is moved by the story of a missing woman named Izzy and decides to investigate despite Snapper...

After Livewire seemingly breaks out of prison, Supergirl is intent on recapturing her. After trainin...

Armek, a White Martian, descends on National City intent on taking M’gann back to Mars to face her p...

After Metallo breaks out of prison and frees Lillian Luthor, the police blame Lena for his escape an...

When Mr. Mxyzptlk, a magical imp, shows up on Earth and declares his love for Kara, she tries to let...

When Jeremiah Danvers is rescued from Cadmus, Alex and Kara are thrilled to have their father back....

As Alex searches for Jeremiah and Kara investigates a series of alien kidnappings, the sisters reali...

A new villain comes to National City, putting Supergirl on high alert. Meanwhile, Winn’s girlfriend,...

A large bounty is put out on Supergirl and aliens from far and near attack National City intent on t...

Lena’s ex-boyfriend, Jack Spheer, comes to National City to unveil his big breakthrough in nano-tech...

Alex is kidnapped and the kidnapper threatens to kill her unless Supergirl releases a notorious crim...

When an alien attacks National City, Supergirl and the DEO learn the alien is a Phorian, an otherwis...

Supergirl grapples with whether or not to obey the President's orders regarding Rhea's latest action...

Supergirl challenges Rhea to battle to save National City. Meanwhile, Superman returns and Cat Grant...

Kara deals with the loss of Mon-El by focusing all her energy on being Supergirl and the mysterious...

Psi, a thief with psychic powers, attacks National City. Able to immobilize people by tapping into t...

Eliza throws Alex and Maggie a wedding shower, which causes Maggie to reach out to her estranged fat...

Kara investigates a secretive new group whose leader, Thomas Coville, has a mysterious connection to...

When multiple children get sick from lead poisoning, Morgan Edge points the finger at Lena and blame...

Kara and Alex head home to Midvale for a little R&R. While there, Kara recalls a painful memory of a...

When Winn and the team discover an alien ship has crash landed deep underwater beneath National City...

Barry and Iris’s wedding brings the gang together, but things go awry when villains from Earth-X att...

Supergirl investigates a mysterious symbol popping up all over National City, tracing its origins ba...

Struggling to heal from her injuries inflicted by Reign, Supergirl remains in a dreamlike state, una...

As Reign continues to terrorize the city, Supergirl teams up with Saturn Girl, and the two recruit S...

Someone tries to kill Morgan Edge and he barely survives. He accuses Lena of being behind the attemp...

The DEO captures a second Worldkiller, Purity. Supergirl and Alex use very different methods of inte...

When Winn’s father dies, his estranged mother, Mary, reappears trying to reconnect and to explain wh...

Myr'nn inadvertently causes psychic disturbances at the DEO; Supergirl must work with J'onn to conta...

Supergirl and Imra have different ideas on how to stop the third Worldkiller, Pestilence. However, w...

Still reeling after learning about Lena’s secret, Supergirl asks Guardian for a favor that could alt...

When Reign starts hunting Ruby, Supergirl and Alex work together to keep her safe. Supergirl and J'o...

When Tanya, a disciple of Coville's, escapes from what's left of his cult, she gives Kara and James...

Supergirl is stunned to discover that a part of Krypton survived. Meanwhile, Alex is attacked while...

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

Supergirl learns the true depth of Selena's nefarious plans for Earth. Supergirl, Mon-El and Alura m...

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

Diving back into reporting, Kara welcomes a new cub reporter to CatCo. Meanwhile, James and Lena arg...

A shocking revelation causes chaos in National City. Supergirl sets out to capture Mercy Graves, whi...

Ben Lockwood didn't always hate aliens. Through a series of incidents, and input from his anti-alien...

When Supergirl needs help, Alex asks Lena and Brainiac to team up. Meanwhile, J’onn questions his de...

Colonel Haley makes a surprising decision regarding Supergirl. Kara writes a series of articles high...

Everyone gathers for Thanksgiving but Kara is feeling down after her televised debate with Ben Lockw...

James falls in deeper with the Children of Liberty in his efforts to meet Agent Liberty. Meanwhile,...

Nia has a powerful dream about Agent Liberty but refuses to look at it as a prophetic dream and push...

Supergirl, The Flash, Green Arrow and Superman engage in the battle of their lives. The crossover s...

Colonel Haley is upset after Supergirl responds to a distress call from a Navy ship that turned out...

Kara joins Nia on a trip to Nia's hometown to visit her family during the town's annual Harvest Fest...

With his P.I. shingle newly hung outside his office, J'onn welcomes new clients. Trying to take her...

Manchester Black breaks out of prison with the help of his new team, The Elite, who are set on punis...

Between Ben Lockwood’s new push to stir up the anti-alien movement and the Elite’s desire to target...

Secretly furloughed from prison due to failing health, Lex Luthor visits his sister, Lena, to seek h...

In the wake of Lex Luthor's return, the show flashes back to what he's been doing for the last two y...

Supergirl must deal with the destructive aftermath of Lex's nefarious plans. Shocked at what Lex has...

Kara and Lena head to Stryker's Island to search for clues on how to defeat Lex. At the prison, Kara...

As Kara doggedly works as a reporter to clear Supergirl's name, Dreamer picks up the slack as Nation...

Kara and Lena head to Kaznia to hunt down Lex. However, Eve Tessmacher sets a trap for the duo that...

Kara comes face to face with Red Daughter and the two engage in an epic battle. Determined to find a...

Lex Luthor descends upon Washington, DC and summons Lena and Lillian Luthor to the White House. Supe...

Kara is surprised to find that CatCo has a new owner who has brought in a star reporter. New couples...

Supergirl, Alex, and Brainiac thwart an alien attack while William investigates Kara. J'onn J'onzz a...

Kara attempts to mend her relationship with Lena. J’onn J’onzz takes a deep dive into his memories w...

Kara's investigation into William Dey's "criminal" activities results in the shocking revelation he...

On the eve of the worldwide launch of Andrea Rojas's VR contact lenses, Kara and William team up on...

While a new villain is under arrest at the DEO, Supergirl uses him to try and understand who is resp...

Supergirl finally learns the truth about Lena while tangling with Leviathan. J'onn J'onn makes a dis...

Supergirl's struggle against Leviathan reaches a boiling point as she faces off against Rama Khan. M...

The Monitor sends Harbinger to gather the worlds’ greatest heroes - Supergirl, The Flash, Green Arro...

The subsequent complications from the Crisis leave Supergirl to face a chaotic threat.

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

Supergirl helps Winn face his greatest fear. After Alex sets out to find evidence against Lex, Brain...

Mxyzptlk returns with a proposition for Kara – what if she could go back in time and tell Lena her s...

Lex tasks Supergirl with protecting Andrea from an anti-tech extremist, but his nefarious purpose go...

Nia’s roommate, Yvette, is attacked by a man targeting Dreamer because he doesn’t like that Dreamer...

Alex uses a pair of Obsidian contact lenses to visit a virtual National City where she takes on a wh...

Lex proceeds to lay an intricate plan to bring Lena closer to him, defeat Leviathan’s latest attack,...

Supergirl and the team go head to head against Rama Khan and Leviathan. Meanwhile, Lena and Lex must...

Supergirl realizes that in order to stop Lex and Leviathan she must work with the one person she nev...

As Brainiac lays close to death after trying to stop Lex, Supergirl and team soar in to save him, en...

As the stakes with Lex are raised higher than ever before, Lena must decide how far she is willing t...

Supergirl makes a new ally. Lena and Lex battle for control of Luthor Corp.

Supergirl finds an opportunity to escape from the Phantom Zone but it comes with some dangerous stri...

Nia and Brainy attempt to save Supergirl from the Phantom Zone by time traveling back to Kara's home...

Part two of the flashback episodes pick up where things left off - Young Kara experiences kryptonite...

As the Super Friends brave the Phantom Zone to bring Supergirl home, each member of the team is conf...

As Supergirl and Zor-El make their return to National City, they are determined to keep the Phantom...

Kelly meets Joey, a young orphaned alien boy, who is acting out in foster care because he fears ther...

Supergirl intervenes when a building in the Heights that was set aside for low income housing is sud...

Supergirl and team must stop Nyxly from vanquishing a familiar face from Supergirl's past - Mr. Mxyz...

Kelly is horrified when the Ormfell building implodes, injuring many in the community, including Joe...

Supergirl and team race Nyxly for control of a magical totem that controls courage. Supergirl and Ny...

Lena is uncertain about using her magical abilities to help Supergirl retrieve the second totem from...

Supergirl continues to fight Nyxly for the remaining totems but after Nyxly kidnaps William, Supergi...

Kara lands her dream story for Catco but when the city is suddenly attacked by a nightmare monster a...

When Lex Luthor appears by Nyxly's side, Supergirl and team must deal with the emotional fallout of...

Supergirl is determined to keep everyone safe from Lex and Nyxly so she doubles down on patrol, espe...

Supergirl and the super friends take drastic action after a loved one is kidnapped by Nyxly and Lex....

Supergirl is joined by familiar faces from the past to help her stop Lex and Nyxly for good. Meanwhi...