Supergirl and team take on Serena in an epic battle for Earth.
Supergirl learns the true depth of Serena’s nefarious plans for Ea..
Kara makes a major life decision. J’onn finds out that special DEO..
Supergirl is stunned to discover that a part of Krypton survived. Me..
When Tanya, a disciple of Coville’s, escapes from what’s left of..
When Reign starts hunting Ruby, Supergirl and Alex work together to ..
Still reeling after learning about Lena’s secret, Supergirl asks G..
Supergirl and Imra have different ideas on how to stop the third Wor..
When Winn’s father dies, his estranged mother, Mary, reappears try..
The DEO captures a second Worldkiller, Purity. Supergirl and Alex us..
Someone tries to kill Morgan Edge and he barely survives. He accuses..
As Reign continues to terrorize the city, Supergirl teams up with Sa..
Struggling to heal from her injuries inflicted by Reign, Supergirl r..
Barry and Iris’s wedding brings the gang together, but things go a..
When Winn and the team discover an alien ship has crash landed deep ..
Kara and Alex head home to Midvale for a little R&R. While there, Ka..
When multiple children get sick from lead poisoning, Morgan Edge poi..
Kara investigates a secretive new group whose leader, Thomas Coville..
Eliza throws Alex and Maggie a wedding shower, which causes Maggie t..
Psi, a thief with psychic powers, attacks National City. Able to imm..
Kara deals with the loss of Mon-El by focusing all her energy on bei..
Supergirl challenges Rhea to battle to save National City. Meanwhile..
Supergirl grapples with whether or not to obey the President's order..
When an alien attacks National City, Supergirl and the DEO learn the..
Alex is kidnapped and the kidnapper threatens to kill her unless Sup..
Lena’s ex-boyfriend, Jack Spheer, comes to National City to unveil..
A large bounty is put out on Supergirl and aliens from far and near ..
A new villain comes to National City, putting Supergirl on high aler..
As Alex searches for Jeremiah and Kara investigates a series of alie..
When Jeremiah Danvers is rescued from Cadmus, Alex and Kara are thri..
When Mr. Mxyzptlk, a magical imp, shows up on Earth and declares his..
After Metallo breaks out of prison and frees Lillian Luthor, the pol..
After Livewire seemingly breaks out of prison, Supergirl is intent o..
When Kara investigates the story of a missing woman, she and Mon-El ..
Eliza comes to town to celebrate Thanksgiving with her daughters. Al..
While Guardian tries to clear his name after being accused of a murd..
The Guardian debuts to lend a hand after a parasite alien drains Sup..
Supergirl must beat a ruthless new gang who has been armed with dang..
When Kara and Alex investigate the murder of an unregistered alien, ..
An attack is made on the President as hot-button, alien vs. human ri..
CADMUS attacks National City with a Kryptonite-powered villain who e..
When a new threat emerges in National City, Kara/Supergirl teams up ..
Supergirl is forced to do battle with an unexpected foe and must ris..
Kara must find a way to free her friends when Non and Indigo use min..
Kara gains a new ally when the lightning-fast superhero The Flash su..
J’onn J’onzz reveals the details of meeting Kara and Alex’s fa..
After being exposed to red kryptonite, Kara turns malicious and beco..
Kara travels to the Fortress of Solitude to learn how to defeat Indi..
Supergirl battles with Master Jailer (Jeff Branson), who is tracking..
A parasitic alien traps Kara in a dream where her home planet is int..
A twisted version of Supergirl tries to destroy Kara; Cat's son (Bla..
A member of the alien race responsible for killing Hank's people kid..
Winn's father, a super villain named Toyman, escapes from prison and..
While Astra is held captive, her husband abducts Hanks; Cat continue..
Astra challenges Kara's beliefs about her mother; a hacker exposes C..
Kara and her friends must rely on their inner strength and courage w..
Anger gets the better of Kara when she goes too far during a trainin..
While Kara is baby-sitting Cat's son, she must also protect the city..
Kara's foster mother visits for Thanksgiving; Cat and Supergirl beco..
One of Superman's enemies is gunning for Supergirl, whose powers are..
When Kara’s attempts to help National City don't go according to p..
Kara at age 12 was sent from her dying home planet of Krypton to Ear..