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Episodes
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Girl of Steel
Kara deals with the loss of Mon-El by focusing her energy on being Supergirl and concentrating on a mysterious new threat. Alex confesses a secret to Maggie. A citizen...
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October 9, 2017
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Triggers
A thief with psychic powers attacks National City and proves to be a formidable opponent for Supergirl.
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October 16, 2017
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Far from the Tree
Maggie reaches out to her estranged father when Eliza throws her and Alex a wedding shower, while Supergirl joins J'onn on a personal mission.
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October 23, 2017
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The Faithful
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.
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October 30, 2017
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Damage
Morgan Edge blames Lena for children getting sick from lead poisoning.
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November 6, 2017
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Midvale
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...
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November 13, 2017
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Wake Up
Kara investigates when an alien ship lands deep underwater beneath National City; Hank attempts to bond with his father; Samantha looks to her estranged mother for...
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November 20, 2017
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Crisis on Earth-X, Part 1
The gang comes together for Barry and Iris's wedding, but the ceremony is crashed by villains from Earth-X.
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November 27, 2017
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Reign
Supergirl traces the origins of a mysterious symbol to an ancient prophecy and the mark of the World Killer, Reign.
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December 4, 2017
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Legion of Super-Heroes
Supergirl remains in a dreamlike state after sustaining injuries from Reign, so Mon-El recruits Brainiac-5, a member of the Legion of Superheroes, to bring her back.
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January 15, 2018
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Fort Rozz
Supergirl and Saturn Girl recruit Livewire and Psi for a mission to recover a prisoner from Fort Rozz who knows how to defeat Reign.
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January 22, 2018
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For Good
Morgan Edge accuses Lena of plotting an attempt on his life and Kara steps in to help her.
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January 29, 2018
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Both Sides Now
The DEO captures another Worldkiller, who escapes and attacks the city's subway tunnels.
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February 5, 2018
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Schott Through the Heart
Following the death of his father, Winn must work with his estranged mother to stop a copycat Toyman.
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April 16, 2018
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In Search of Lost Time
Supergirl must work with J'onn to contain the chaos resulting from Myr'nn's psychic disturbances at the DEO; Mon-El teaches Kara fighting techniques he learned in the...
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April 23, 2018
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Of Two Minds
Supergirl and Imra have different ideas on how to stop the third Worldkiller, Pestilence. However, when both Alex and Winn are seriously injured by Pestilence,...
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April 30, 2018
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Trinity
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...
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May 7, 2018
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Shelter from the Storm
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...
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May 14, 2018
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The Fanatical
A disciple of Coville's escapes from what's left of his cult and gives Kara and James a journal that could help save Sam; Guardian is found out.
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May 21, 2018
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Dark Side of the Moon
Supergirl is stunned to discover that a part of Krypton survived. Meanwhile, Alex is attacked while out with Ruby, and Lena considers how far will she go to keep Reign...
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May 28, 2018
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Not Kansas
Kara makes a major life decision. Meanwhile, J'onn finds out that special DEO-caliber guns have hit the streets of National City.
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June 4, 2018
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Make It Reign
Supergirl learns the true depth of Selena's nefarious plans for Earth. Supergirl, Mon-El and Alura must devise a plan to stop her before Selena gets to Earth. J'onn...
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June 11, 2018
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Battles Lost and Won
Supergirl and her team take on Selena in an epic battle for Earth.
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June 18, 2018
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Credits and Details
