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The Best Episodes of Supergirl

Every episode of Supergirl ranked from best to worst. Let's dive into the Best Episodes of Supergirl!

Binge this in 3d 16h•Peaking at 8.8/10

Twenty-four-year-old Kara Zor-El, who was taken in by the Danvers family when she was 13 after being sent away from Krypton, must learn to embrace her powers after previously hiding them. The Danvers teach her

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Episode Rankings

  1. #1 Fan Favorite
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    Supergirl Season 3 Episode 8 - Crisis on Earth-X (I)
    8.8/10(3985 votes)

    S3:E8

    Barry and Iris’s wedding brings the gang together, but things go awry when villains from Earth-X 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. The crossover continues on Arrow S06E08 Crisis on Earth-X (II), The Flash S04E08 Crisis on Earth-X (III) and DC's Legends of Tomorrow S03E08 Crisis on Earth-X (IV).

    Director:Larry Teng
    Writer:Unknown

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  2. Supergirl Season 1 Episode 18 - Worlds Finest
    8.7/10(4540 votes)

    S1:E18

    Kara gains a new ally when the lightning-fast superhero The Flash suddenly appears from an alternate universe and helps Kara battle Siobhan, aka Silver Banshee, and Livewire in exchange for her help in finding a way to return him home.

    Director:Nick Gomez
    Writer:Unknown

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  3. Supergirl Season 1 Episode 16 - Falling
    8.6/10(3672 votes)

    S1:E16

    Kara turns on her friends and the citizens of National City after being exposed to Red Kryptonite makes her malicious and dangerous. Also, Cat appears on THE TALK to discuss Supergirl.

    Director:Larry Teng
    Writers:Jessica Queller, Robert Rovner

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  4. Supergirl Season 5 Episode 13 - It's a Super Life
    8.6/10(2169 votes)

    S5:E13

    Mxyzptlk returns with a proposition for Kara – what if she could go back in time and tell Lena her secret before Lex did, would things turn out different? Looking back over key moments throughout the series, Kara must decide if she wants to change history to become friends with Lena again.

    Director:Jesse Warn
    Writer:Unknown

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  5. Supergirl Season 3 Episode 9 - Reign
    8.5/10(2303 votes)

    S3:E9

    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.

    Director:Glen Winter
    Writers:Paula Yoo, Caitlin Parrish

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  6. Supergirl Season 4 Episode 9 - Elseworlds (III)
    8.4/10(2657 votes)

    S4:E9

    Supergirl, The Flash, Green Arrow and Superman engage in the battle of their lives. The crossover starts on The Flash S05E09 Elseworlds (I) and Arrow S07E09 Elseworlds (II).

    Director:Jesse Warn
    Writer:Unknown

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    The 20 WORST Episodes of Supergirl

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  7. Supergirl Season 5 Episode 9 - Crisis on Infinite Earths: Part One (I)
    8.4/10(3709 votes)

    S5:E9

    The Monitor sends Harbinger to gather the worlds’ greatest heroes - Supergirl, The Flash, Green Arrow, Batwoman, White Canary, The Atom and Superman - in preparation for the impending Crisis. With their worlds in imminent danger, the superheroes suit up for battle while J’onn and Alex recruit Lena to help them find a way to save the people of Earth-38. This crossover continues on Batwoman S1E09, The Flash S6E09, Arrow S8E08, and Legends of Tomorrow S05E01.

    Director:Jesse Warn
    Writer:Unknown

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  8. Supergirl Season 4 Episode 16 - The House of L
    8.3/10(1641 votes)

    S4:E16

    In the wake of Lex Luthor's return, the show flashes back to what he's been doing for the last two years and how his secret machinations and plans have affected Supergirl and Lena.

    Director:Unknown
    Writers:Eric Carrasco, Dana Horgan

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  9. Supergirl Season 2 Episode 1 - The Adventures of Supergirl
    8.2/10(3449 votes)

    S2:E1

    When a new threat emerges in National City, Kara/Supergirl teams up with her cousin, Clark Kent/Superman, to stop it. Kara is thrilled to have family in town but it leaves Alex feeling a bit left out. Meanwhile, Hank and Supergirl are stunned by the pod that came crashing to Earth.

    Director:Glen Winter
    Writer:Unknown

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  10. Supergirl Season 3 Episode 6 - Midvale
    8.1/10(2373 votes)

    S3:E6

    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.

    Director:Rob J. Greenlea
    Writers:Caitlin Parrish, Jess Kardos

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  11. Supergirl Season 4 Episode 15 - O Brother, Where Art Thou?
    8.1/10(1579 votes)

    S4:E15

    Secretly furloughed from prison due to failing health, Lex Luthor visits his sister, Lena, to seek her help finding a cure. Savvy as ever, Lena is suspicious of Lex's motives but when she's faced with a life and death situation, she must decide how she truly feels about her brother. Meanwhile, Supergirl and J'onn face off against Manchester Black. James' sister Kelly comes to town.

    Director:Tawnia McKiernan
    Writers:Derek Simon, Nicki Holcomb

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  12. Supergirl Season 4 Episode 22 - The Quest for Peace
    8.1/10(1484 votes)

    S4:E22

    Lex Luthor descends upon Washington, DC and summons Lena and Lillian Luthor to the White House. Supergirl realizes she has one last chance to stop Lex and turns to the power of the press to help her.

    Director:Jesse Warn
    Writer:Unknown

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  13. Supergirl Season 1 Episode 17 - Manhunter
    8.0/10(2862 votes)

    S1:E17

    J'onn J'onzz reveals the details of meeting Kara and Alex's father, Dr. Jeremiah Danvers, and assuming Hank Henshaw's identity. Also, Kara debates trusting someone new with her secret identity and Siobhan plots against Kara.

    Director:Chris Fisher
    Writer:Unknown

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  14. Supergirl Season 2 Episode 2 - The Last Children of Krypton
    8.0/10(2686 votes)

    S2:E2

    CADMUS attacks National City with a Kryptonite-powered villain who ends up seriously hurting Supergirl. Superman blames 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.

    Director:Glen Winter
    Writers:Caitlin Parrish, Robert Rovner

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  15. Supergirl Season 4 Episode 21 - Red Dawn
    8.0/10(1416 votes)

    S4:E21

    Kara comes face to face with Red Daughter and the two engage in an epic battle. Determined to find a way to extract the Harun-El, Lena turns to an unlikely source for help - Lillian Luthor. Meanwhile, Alex realizes she's missing parts of her memory, and Brainy, Nia and J'onn set out to track down aliens who have been abducted by Lex.

    Director:Alexis Ostrander
    Writer:Unknown

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  16. Supergirl Season 1 Episode 7 - Human for a Day
    7.9/10(3370 votes)

    S1:E7

    Kara and her friends must rely on their inner strength and courage when an earthquake strikes National City. Also, Alex’s mistrust of Hank reaches a breaking point when the earthquake traps them in the DEO with Jemm, a powerful alien escapee.

    Director:Larry Teng
    Writers:Yahlin Chang, Ted Sullivan

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  17. Supergirl Season 1 Episode 8 - Hostile Takeover
    7.9/10(3260 votes)

    S1:E8

    Kara goes toe-to-toe with Astra when her aunt challenges Kara’s beliefs about her mother. Also, Cat is threatened with being removed as the CEO of CatCo after a hacker exposes her private and damaging emails.

    Director:Karen Gaviola
    Writers:Caitlin Parrish, Roberto Aguirre-Sacasa

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  18. Supergirl Season 1 Episode 11 - Strange Visitor from Another Planet
    7.9/10(2978 votes)

    S1:E11

    Kara must help Hank face his painful past when a White Martian, a member of the alien race that wiped out his people, kidnaps Senator Miranda Crane, an anti-alien politician. Also, Cat's estranged son, Adam, arrives in National City.

    Director:Glen Winter
    Writers:Michael Grassi, Caitlin Parrish

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  19. Supergirl Season 2 Episode 8 - Medusa (I)
    7.9/10(2922 votes)

    S2:E8

    Eliza comes to town to celebrate Thanksgiving with her daughters. Alex decides it’s time to come out to her mother; Kara is shocked when Eliza suggests Mon-El has feelings for her, and Winn and James consider telling Kara the truth about the Guardian. Meanwhile, Cadmus unleashes a virus that instantly kills any alien in the vicinity so Kara enlists an unexpected ally – Lena Luthor. The epic superhero crossover kicks off tonight when Barry Allen and Cisco Ramon seek Kara's help with an alien invasion on their Earth. The crossover continues on The Flash S03E08 Invasion! (II), Arrow S05E08 Invasion! (III) and DC's Legends of Tomorrow S02E07 Invasion! (IV).

    Director:Stefan Pleszczynski
    Writers:Derek Simon, Jessica Queller

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  20. Supergirl Season 2 Episode 15 - Exodus
    7.9/10(2346 votes)

    S2:E15

    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.

    Director:Michael A. Allowitz
    Writers:Paula Yoo, Eric Carrasco

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  21. Supergirl Season 2 Episode 22 - Nevertheless, She Persisted
    7.9/10(2323 votes)

    S2:E22

    Supergirl challenges Rhea to battle to save National City. Meanwhile, Superman returns and Cat Grant offers Supergirl some sage advice.

    Director:Glen Winter
    Writer:Unknown

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  22. Supergirl Season 1 Episode 13 - For The Girl Who Has Everything
    7.8/10(2995 votes)

    S1:E13

    Kara’s friends must find a way to save her life when a parasitic alien attaches itself to her and traps her in a dream world where her family is alive and her home planet was never destroyed. Also, Alex, Hank and the DEO must fend off a Kryptonian attack while Kara is out of commission.

    Director:Dermott Downs
    Writer:Unknown

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  23. Supergirl Season 2 Episode 12 - Luthors
    7.8/10(2380 votes)

    S2:E12

    After Metallo breaks out of prison and frees Lillian Luthor, the police blame Lena for his escape and arrest her. Despite overwhelming evidence, Kara refuses to believe her friend is guilty and fights to clear Lena’s name. Flashbacks reveal how Lena came to be a Luthor.

    Director:Tawnia McKiernan
    Writers:Cindy Lichtman, Robert Rovner

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  24. Supergirl Season 1 Episode 20 - Better Angels
    7.7/10(2899 votes)

    S1:E20

    Supergirl is forced to do battle with an unexpected foe and must risk everything – including her life – to prevent Non and Indigo from destroying every person on the planet.

    Director:Larry Teng
    Writer:Unknown

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  25. Supergirl Season 2 Episode 3 - Welcome to Earth
    7.7/10(2596 votes)

    S2:E3

    An attack is made on the President as hot-button, alien vs. human rights issues heat up in National City. Supergirl and the DEO are assigned to protect the President and bring in the responsible party. Alex teams up with Detective Maggie Sawyer to investigate the case while Kara searches for a recently escaped Mon-El, who she fears may be the alien behind the assault.

    Director:Rachel Talalay
    Writers:Derek Simon, Jessica Queller

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Best Episodes Summary

"Crisis on Earth-X (I)" is the best rated episode of "Supergirl". It scored 8.8/10 based on 3985 votes. Directed by Larry Teng and written by Unknown, it aired on 11/27/2017. This episode scored 0.1 points higher than the second highest rated, "Worlds Finest".