A large bounty is put out on Supergirl and aliens from far and near attack National City intent on taking out the woman of steel; Alex and Maggie run into Maggie's ex-girlfriend, Emily, who is in town for a week; Hank gets an interesting order from President Marsdin.moreless
A new villain comes to National City, putting Supergirl on high alert; at the same time, she faces an attack by the Music Meister. Meanwhile, Winn's girlfriend, Lyra, gets Winn in trouble with the law; and Maggie attempts to help Winn, but old loyalties get in the way.moreless
As Alex searches for Jeremiah and Kara investigates a series of alien kidnappings, the sisters realize they must break the rules to foil a new Cadmus plot. In an effort to get Snapper Carr to run a story that would help her stop Cadmus, Kara agrees to set up an interview between Snapper and Supergirl.moreless
Alex and Kara are thrilled to have their father, Jeremiah Danvers, back after he's rescued from Cadmus. The Danvers arrange a family dinner to celebrate, but things go awry when a suspicious Mon-El starts to question Jeremiah about his sudden return.moreless
A magical imp named Mr. Mxyzptlk shows up on Earth and declares his love for Kara, who tries to let him down easy. However, he won't take no for an answer and starts to wreak havoc on National City. As Mon-El and Kara argue over how to get rid of Mr. Mxyzptlk, Alex and Maggie celebrate their first Valentine's Day together.moreless
Lena is arrested for helping break Metallo and Lillian Luthor out of prison. While the evidence seems stacked against her, Kara refuses to believe her friend is guilty and fights to clear Lena's name.moreless
Armek arrives in National City intent on taking M'gann back to Mars to face her punishment as a traitor. Thinking she'll be safe at the DEO, Hank and Supergirl are in for a startling surprise when shapeshifter Armek is in the building and under disguise.moreless
Supergirl sets out to recapture Livewire, who has seemingly escaped from prison, but her efforts hit a road block when Mon-El puts Supergirl's safety before the citizens of National City. Meanwhile, James decides to be truthful with Kara; and M'Gann falls into a coma following a psychic attack.moreless
The story of a missing woman named Izzy moves Kara to investigate, even though Snapper Carr has told her to leave the matter alone. When Kara and Mon-El check out the last place Izzy was seen, they end up thrust through a portal to another planet, where the downtrodden are sold as slaves as part of a trafficking ring run by Roulette. Meanwhile, Alex blames herself---and her new relationship with Maggie---for her sister's disappearance.moreless
The Legends team up with Green Arrow, Flash, Supergirl, and their teammates in 2016 to end the Dominator threat once and for all. Meanwhile, Martin continues to suffer double-memories from the temporal aberration that he caused with his younger self during the mission in 1987 DC.moreless
Oliver finds himself in the life he would have had if the Queen's Gambit hadn't sank and he hadn't been stranded on the island. Meanwhile Felicity calls in Flash and Supergirl to help her and the recruits battle a superpowered thief who has stolen a piece of technology that she needs to find their missing teammates.moreless
Eliza Danvers comes to National City for Thanksgiving, and Alex decides to come out to her mother. Meanwhile, Barry Allen and Cisco Ramon ask Supergirl to help them with the Dominator invasion on their earth, and Cadmus creates an alien-specific virus from the information at the Fortress to complete their master plan.moreless
The Guardian makes his debut in National City to lend a hand after a parasite alien drains Supergirl of her power; at the same time, Mon-El considers a less-than-desirable career change; and Alex struggles with a new reality.moreless
Supergirl faces a new challenge from a ruthless gang who are armed and dangerous with cutting-edge alien technology; at the same time, Kara gets Mon-El an internship at CatCo; James comes to an important decision; and Lena puts Kara's name on the guest list for one of her fund-raisers.moreless
Thrilled to have found another Martian, Hank is determined to get to know M'Gann better; Kara and Alex take notice of an alien fight club run by Roulette while investigating an unregistered alien's murder; and Supergirl starts training Mon-El, whom she has taken under her wing.moreless
Kara fears the recently escaped Mon-El is behind an attack on the president, who Supergirl and the DEO have been assigned to protect; at the same time, the hot-button issue of aliens vs. human rights divides National City.moreless
Supergirl ends up seriously injured during an attack on National City by a kryptonite-powered villain; and Superman puts the blame for his cousin getting hurt on Hank, because the kryptonite was stolen from the DEO. Meanwhile, Kara's first day at her new job doesn't go as planned after she meets her new boss, Snapper Carr.moreless
Superman pays his cousin Supergirl a visit, and they team up to determine if Lex Luthor's sister Lena was behind a space shuttle crash. Meanwhile, the inhabitant of the landing pod is revealed.moreless
Supergirl's enemies plot to destroy every person on the planet, and stopping them won't be easy for the Woman of Steel in the Season 1 finale.
Kara must devise a way to free her friends when Non and Indigo employ mind control to turn all of National City's citizens into their own army.
The Flash arrives in National City from an alternate universe. He teams up with Supergirl to battle the villains Livewire and Silver Banshee, in exchange for Supergirl's help finding him a way to return home.moreless
While Hank's first meeting with Jeremiah is shown, Siobhan plots against Kara, who is deciding whether to trust someone else with her secret identity.
Kara has a major personality change after being exposed to Red Kryptonite. As her friends and the citizens of National City face a malicious and dangerous Supergirl, Cat appears as a guest on "The Talk."moreless
To beat a new villainess, Indigo, Supergirl travels to her cousin's Fortress of Solitude in hopes of finding a way to defeat her opponent.
Supergirl battles the deadly Master Jailer, who is hunting and executing Fort Rozz escapees; at the same time, a second assistant hired by Cat tries to one-up Kara at every turn; James and Kara find themselves in a disagreement over the DEO's methods.moreless
A parasitic alien traps Kara in a dream world where her family is alive and her home planet was never destroyed. As her friends try to save her, it's unclear whether the native Kryptonian wants to be awoken. Meanwhile, with Supergirl out of commission, Alex, Hank and the DEO must fend off an attack on their own.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.
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.
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
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.