Supergirl/Season Three

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Season Three
Season Premiere October 9, 2017
Season Finale June 18, 2018
Episode Count 23
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Season Two



This is the current season of Supergirl.
Content may change as new information and details become available.

Season Three of Supergirl premiered on October 9, 2017.


# # Title Written By Directed By Airdate Viewers 18-49 Rating Prod.
43 1 Girl of Steel Andrew Kreisberg Jesse Warn October 9, 2017 1.867M 0.5% T13.20651
Kara deals with the loss of Mon-El by focusing all her energy on being Supergirl and the mysterious new threat against National City. Alex confesses a secret to Maggie about their impending nuptials. A citizen of National City has a mysterious connection to Kara, and Lena makes a bold move.
Teleplay by Robert Rovner and Caitlin Parrish
44 2 Triggers Gabriel Llanas &
Anna Musky-Goldwyn
David McWhirter October 16, 2017 1.755M 0.5% T13.20652
Psi, a thief with psychic powers, attacks National City. Able to immobilize people by tapping into their worst fears, Psi proves a formidable opponent for Supergirl. Meanwhile, James and Lena are at an impasse, and Samantha starts her new job at L-Corp.
45 3 Far from the Tree Jessica Queller &
Derek Simon
Dermott Downs October 23, 2017 1.762M 0.5% T13.20653
Eliza throws Alex and Maggie a wedding shower, which causes Maggie to reach out to her estranged father. Supergirl joins J'onn on a personal mission.
46 4 The Faithful Paula Yoo &
Katie Rose Rogers
Jesse Warn October 30, 2017 1.823M 0.5% T13.20654
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, and J'onn confesses an old secret.
47 5 Damage Eric Carrasco &
Cindy Lichtman
Kevin Smith November 6, 2017 1.87M 0.5% T13.20655
When multiple children get sick from lead poisoning, Morgan Edge points the finger at Lena and blames her creation of the lead bomb she made to save National City from the Daxamites. While Lena knows she never intended any harm, she fears there may have been a flaw in her design, leaving her responsible. Kara teams up with Samantha to clear Lena's name, but it turns out to be harder than they thought. Meanwhile, Alex and Maggie make a crucial decision about the future of their relationship.
48 6 Midvale Caitlin Parrish &
Jess Kardos
Rob Greenlea November 13, 2017 1.893M 0.5% T13.20656
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 the Danver sisters closer together.
49 7 Wake Up Gabriel Llanas &
Anna Musky-Goldwyn
Chad Lowe November 20, 2017 1.922M 0.5% T13.20657
When Winn and the team discover an alien ship has crash landed deep underwater beneath National City, Kara/Supergirl is called in to investigate. Meanwhile, Hank attempts to bond with his father, Myr'nn. Samantha, eager for some understanding of the changes she has been experiencing, looks to her estranged mother, Patricia Arias, for answers.
50 8 Crisis on Earth-X (1)
part 1 of 4 part crossover with Arrow, The Flash & DC's Legends of Tomorrow
Andrew Kreisberg &
Marc Guggenheim
Larry Teng November 27, 2017 2.713M 0.9% T13.20658
Barry and Iris's wedding brings the gang together, but things go awry when villains from Earth-X, a parallel Earth where the Nazis won World War II and now dominate their world, attack the ceremony. All of the superheroes band together with help from their super friends like Citizen Cold, The Ray, Felicity Smoak, Iris West and Alex Danvers to take on their most formidable villains yet. Earth's mightiest heroes - Green Arrow, Supergirl, The Flash and White Canary - lead their teams into battle to save the world.
Teleplay by Robert Rovner & Jessica Queller
51 9 Reign Paula Yoo &
Caitlin Parrish
Glen Winter December 4, 2017 1.81M 0.8% T13.20659
Supergirl investigates a mysterious symbol popping up all over National City, tracing its origins back to an ancient prophecy and the mark of the World Killer, Reign. Meanwhile, the tension between Lena and Morgan Edge continues to build, causing James to step in and offer up some protection, and possibly igniting a spark in the process.
52 10 Legion of Super-Heroes January 15, 2018 T13.20660
53 11 Fort Rozz January 22, 2018
54 12 For Good January 29, 2018
55 13 TBA February 5, 2018
56 14 TBA April 16, 2018
57 15 TBA April 23, 2018
58 16 TBA April 30, 2018
59 17 TBA May 7, 2018
60 18 TBA May 14, 2018
61 19 TBA May 21, 2018
62 20 TBA May 28, 2018
63 21 TBA June 4, 2018
64 22 TBA June 11, 2018
65 23 TBA June 18, 2018

Supergirl Seasons
Season 1 | Season 2 | Season 3