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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!

The Best Episodes of Supergirl

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...

Seasons6

  1. Background image for Crisis on Earth-X (I)
    8.7/10(3.9k votes)

    #1 - Crisis on Earth-X (I)

    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).

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    Director:Larry Teng
    Writer:Unknown
  2. Background image for Reign
    8.5/10(2.2k votes)

    #2 - Reign

    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.

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  3. Background image for It's a Super Life
    8.5/10(2.1k votes)

    #3 - It's a Super Life

    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.

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    Director:Jesse Warn
    Writer:Unknown
  4. Background image for Elseworlds (III)
    8.4/10(2.6k votes)

    #4 - Elseworlds (III)

    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).

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    Director:Jesse Warn
    Writer:Unknown
  5. Background image for Crisis on Infinite Earths: Part One (I)
    8.4/10(3.6k votes)

    #5 - Crisis on Infinite Earths: Part One (I)

    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.

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    Director:Jesse Warn
    Writer:Unknown
  6. Background image for The House of L
    8.3/10(1.6k votes)

    #6 - The House of L

    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.

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  8. Background image for The Adventures of Supergirl
    8.2/10(3.3k votes)

    #7 - The Adventures of Supergirl

    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.

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    Director:Glen Winter
    Writer:Unknown
  9. Background image for Midvale
    8.1/10(2.3k votes)

    #8 - Midvale

    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.

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  10. Background image for O Brother, Where Art Thou?
    8.1/10(1.5k votes)

    #9 - O Brother, Where Art Thou?

    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.

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  11. Background image for The Quest for Peace
    8.1/10(1.4k votes)

    #10 - The Quest for Peace

    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.

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    Director:Jesse Warn
    Writer:Unknown
  12. Background image for The Last Children of Krypton
    8.0/10(2.6k votes)

    #11 - The Last Children of Krypton

    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.

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  13. Background image for Red Dawn
    8.0/10(1.3k votes)

    #12 - Red Dawn

    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.

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    Writer:Unknown
  14. Background image for Medusa (I)
    7.9/10(2.8k votes)

    #13 - Medusa (I)

    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).

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  15. Background image for Exodus
    7.9/10(2.3k votes)

    #14 - Exodus

    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.

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  16. Background image for Nevertheless, She Persisted
    7.9/10(2.2k votes)

    #15 - Nevertheless, She Persisted

    S2:E22

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

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    Director:Glen Winter
    Writer:Unknown
  17. Background image for Luthors
    7.8/10(2.3k votes)

    #16 - Luthors

    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.

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  18. Background image for Welcome to Earth
    7.7/10(2.5k votes)

    #17 - Welcome to Earth

    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.

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  19. Background image for Changing
    7.7/10(2.5k votes)

    #18 - Changing

    S2:E6

    The Guardian debuts to lend a hand after a parasite alien drains Supergirl of her power. Mon-El considers a less than desirable new career which then leads him to contemplate his motives. Alex struggles with a new reality.

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    Director:Larry Teng
    Writer:Unknown
  20. Background image for Resist
    7.7/10(2.0k votes)

    #19 - Resist

    S2:E21

    Supergirl grapples with whether or not to obey the President's orders regarding Rhea's latest actions. Meanwhile, Cat Grant returns to National City.

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  21. Background image for Legion of Superheroes
    7.7/10(1.8k votes)

    #20 - Legion of Superheroes

    S3:E10

    Struggling to heal from her injuries inflicted by Reign, Supergirl remains in a dreamlike state, unable to be reached. Mon-El recruits one of the Legion members, Brainiac-5, to try to bring her back. Meanwhile, Reign continues her rampage on the city so the DEO teams up with the Legion of Superheroes to try to stop her.

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  22. Background image for Confidence Women
    7.7/10(1.5k votes)

    #21 - Confidence Women

    S5:E6

    While a new villain is under arrest at the DEO, Supergirl uses him to try and understand who is responsible for the recent attacks. Meanwhile, Andrea and Lena think back on their tumultuous past.

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  23. Background image for Tremors
    7.7/10(1.6k votes)

    #22 - Tremors

    S5:E7

    Supergirl finally learns the truth about Lena while tangling with Leviathan. J'onn J'onn makes a discovery about his brother's whereabouts.

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  24. Background image for The Wrath of Rama Khan
    7.7/10(1.4k votes)

    #23 - The Wrath of Rama Khan

    S5:E8

    Supergirl's struggle against Leviathan reaches a boiling point as she faces off against Rama Khan. Meanwhile, as Lena and Hope work to launch Project Non Nocere, Hope proves to be an invaluable asset to Lena.

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  25. Background image for Immortal Kombat
    7.7/10(1.2k votes)

    #24 - Immortal Kombat

    S5:E19

    Supergirl realizes that in order to stop Lex and Leviathan she must work with the one person she never thought she’d trust again – Lena. Nia keeps dreaming about Brainy but struggles with what the dreams are trying to tell her. Meanwhile, Brainy realizes there is only one way to stop Lex.

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    Writer:Unknown
  26. Background image for Survivors
    7.6/10(2.4k votes)

    #25 - Survivors

    S2:E4

    When Kara and Alex investigate the murder of an unregistered alien, the trail leads to an alien fight club run by Roulette, the ringmaster who commands aliens to fight in mortal combat for the entertainment of rich humans. While trying to stop the fighting, Supergirl and Martian Manhunter find themselves up against a surprising opponent. Meanwhile, Hank is thrilled to have found another Martian and tries to get to know M'Gann better. Supergirl takes Mon-El under her wing and begins to train him.

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    Writer:Paula Yoo

Best Episodes Summary

"Crisis on Earth-X (I)" is the best rated episode of "Supergirl". It scored 8.7/10 based on 3855 votes. Directed by Larry Teng and written by Unknown, it aired on 11/27/2017. This episode scored 0.2 points higher than the second highest rated, "Reign".