Season 3
(2017)
Overview
As season three returns with all-new supercharged adventures this fall, Kara and team will come up against a new threat in the form of DC Worldkiller, Reign.
Cast
as Kara Danvers / Supergirl / Kara Zor-El
as Alex Danvers / Sentinel
as J'onn J'onzz / Martian Manhunter
as Lena Luthor
as Samantha Arias / Reign
as Mon-El
as Winn Schott
as James 'Jimmy' Olsen / Guardian
Episodes
Girl of Steel 6.4
October 9, 2017
Kara deals with the loss of Mon-El by focusing all her energy on being Supergirl and the mysterious new threat against …
Triggers 7.2
October 16, 2017
Psi, a thief with psychic powers, attacks National City. Able to immobilize people by tapping into their worst fears, P…
Far From the Tree 6.8
October 23, 2017
Eliza throws Alex and Maggie a wedding shower, which causes Maggie to reach out to her estranged father. Supergirl join…
The Faithful 7.1
October 30, 2017
Kara investigates a secretive new group whose leader, Thomas Coville, has a mysterious connection to Supergirl. Meanwhi…
Damage 7.4
November 6, 2017
When multiple children get sick from lead poisoning, Morgan Edge points the finger at Lena and blames her creation of t…
Midvale 7.8
November 13, 2017
Kara and Alex head home to Midvale for a little R&R. While there, Kara recalls a painful memory of a childhood friend's…
Wake Up 7.3
November 20, 2017
When Winn and the team discover an alien ship has crash landed deep underwater beneath National City, Kara/Supergirl is…
Crisis on Earth-X (I) 7.1
November 27, 2017
Barry and Iris’s wedding brings the gang together, but things go awry when villains from Earth-X attack the ceremony. A…
Reign 6.7
December 4, 2017
Supergirl investigates a mysterious symbol popping up all over National City, tracing its origins back to an ancient pr…
Legion of Superheroes 7.2
January 15, 2018
Struggling to heal from her injuries inflicted by Reign, Supergirl remains in a dreamlike state, unable to be reached. …
Fort Rozz 7.1
January 22, 2018
As Reign continues to terrorize the city, Supergirl teams up with Saturn Girl, and the two recruit Supergirl’s former e…
For Good 7.5
January 29, 2018
Someone tries to kill Morgan Edge and he barely survives. He accuses Lena of being behind the attempt and vows to destr…
Both Sides Now 7.1
February 5, 2018
The DEO captures a second Worldkiller, Purity. Supergirl and Alex use very different methods of interrogation with Puri…
Schott Through the Heart 6.7
April 16, 2018
When Winn’s father dies, his estranged mother, Mary, reappears trying to reconnect and to explain why she abandoned him…
In Search of Lost Time 7.2
April 23, 2018
Myr'nn inadvertently causes psychic disturbances at the DEO; Supergirl must work with J'onn to contain the chaos; Mon-E…
Of Two Minds 6.7
April 30, 2018
Supergirl and Imra have different ideas on how to stop the third Worldkiller, Pestilence. However, when both Alex and W…
Trinity 6.8
May 7, 2018
Still reeling after learning about Lena’s secret, Supergirl asks Guardian for a favor that could alter his relationship…
Shelter from the Storm 6.9
May 14, 2018
When Reign starts hunting Ruby, Supergirl and Alex work together to keep her safe. Supergirl and J'onn look to Sam’s mo…
The Fanatical 6.7
May 21, 2018
When Tanya, a disciple of Coville's, escapes from what's left of his cult, she gives Kara and James a journal that coul…
Dark Side of the Moon 6.7
May 28, 2018
Supergirl is stunned to discover that a part of Krypton survived. Meanwhile, Alex is attacked while out with Ruby, and …
Not Kansas 6.1
June 4, 2018
Kara makes a major life decision. Meanwhile, J'onn finds out that special DEO-caliber guns have hit the streets of Nati…
Make It Reign 7.2
June 11, 2018
Supergirl learns the true depth of Serena's nefarious plans for Earth. Supergirl, Mon-El and Alura must devise a plan t…
Battles Lost and Won 6.7
June 18, 2018
Supergirl and team take on Selena in an epic battle for Earth.