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The Best Episodes of 'Supergirl'

Updated May 11, 2021 13.2k votes 553 voters 5.5k views102 items

There are so many good episodes of Supergirl, but which ones really stand out? Do you like "Crisis on Earth-X: Part 1" the best, or is "Falling" your favorite episode of Supergirl? To determine once and for all what the best episodes of Supergirl are, let's rank every Supergirl episode from best to worst.

A DC Comics superhero series, Supergirl premiered on CBS on October 26, 2015, and follows Kara Zor-El as she embraces her powers to become the protector of National City. Supergirl, which is set within the Arrowverse, stars Melissa Benoist as Kara, Mehcad Brooks as James Olsen, Chyler Leigh as Alex Danvers, Jeremy Jordan as Winslow "Winn" Schott Jr., and Calista Flockhart as Cat Grant. Beginning with season 2, Supergirl moved to the CW, joining Arrow and The Flash and becoming part of the CW Arrowverse.

Vote up your favorite episodes of Supergirl, and downvote any bad episodes that you really didn't enjoy, despite how much you love the series as a whole. It can be painful to put one Supergirl episode over the other when there are so many good ones, which is why you can vote on however many episodes you like.

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  • 1
    291
    22

    Alex

    October 10, 2016

    Season 2, Episode 19

    Alex is kidnapped and the kidnapper threatens to kill her unless Supergirl releases a notorious criminal from prison. Supergirl and Maggie have always had different approaches to apprehending criminals but this time they must work together to save Alex. Meanwhile, Rhea has an interesting proposal for Lena.

  • 2
    249
    27

    Medusa (I)

    November 28, 2016

    Season 2, Episode 8

    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).

  • 3
    216
    17

    Changing

    November 14, 2016

    Season 2, Episode 6

    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 and Alex struggles with a new reality.

  • 4
    223
    20

    Welcome to Earth

    October 24, 2016

    Season 2, Episode 3

    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.

  • 5
    213
    16

    Crossfire

    November 7, 2016

    Season 2, Episode 5

    Supergirl must beat a ruthless new gang who has been armed with dangerous new alien technology. When Cadmus sends a video to the DEO, the team realizes Cadmus is the one staffing the criminals for a secret mission. Meanwhile, Kara gets Mon-El a job as an intern at CatCo, James makes an important decision and Lena invites Kara to attend one of her fundraisers.

  • 6
    286
    45

    Far From The Tree

    October 23, 2017

    Season 3, Episode 3

    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.

  • 7
    222
    21

    Supergirl Lives

    January 23, 2017

    Season 2, Episode 9

    Kara and Mon-El are transported to another planet, led by Roulette where the downtrodden are sold as slaves. Even worse, Kara & Mon-El don’t have their powers.

  • 8
    219
    20

    Survivors

    October 31, 2016

    Season 2, Episode 4

    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.

  • 9
    186
    15

    Exodus

    March 6, 2017

    Season 2, Episode 15

    As Alex searches for Jeremiah, Kara agrees to set up an interview between Snapper Carr and Supergirl to help stop a new Cadmus plot.

  • 10
    196
    21

    Homecoming

    February 27, 2017

    Season 2, Episode 14

    When Jeremiah Danvers is rescued from Cadmus, Alex and Kara are thrilled to have their father back. The Danvers arrange a family dinner to celebrate but things go awry when a suspicious Mon-El starts to question Jeremiah about his sudden return.

  • 11
    189
    18

    The Darkest Place

    November 21, 2016

    Season 2, Episode 7

    While Guardian tries to clear his name after being accused of a murder committed by another vigilante, Supergirl heads out on a solo mission to rescue Mon-El who has been captured by Cadmus. While fighting to free Mon-El, Supergirl comes face to face with Cyborg Superman.

  • 12
    175
    16

    Luthors

    January 23, 2017

    Season 2, Episode 12

    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.

  • 13
    176
    20

    Star-Crossed

    March 20, 2017

    Season 2, Episode 16

    A new villain comes to National City, putting Supergirl on high alert. Meanwhile, Winn’s girlfriend, Lyra, gets Winn in trouble with the law. Maggie attempts to help Winn but old loyalties get in the way. The Music Meister attacks Supergirl.

    The crossover continues on The Flash S03E17 Duet (II).

  • 14
    239
    49

    Mr. & Mrs. Mxyzptlk

    February 20, 2017

    Season 2, Episode 13

    When Mr. Mxyzptlk (PETER GADIOT), a magical imp, shows up on Earth and declares his love for Kara, her rejection causes him to wreak havoc on National City.

  • 15
    165
    18

    The Martian Chronicles

    February 6, 2017

    Season 2, Episode 11

    When a White Martian (TERRELL TILFORD) descends on National City to capture M’gann, Supergirl and Hank hide her in the DEO, but he follows by shapeshifting.

  • 16
    168
    21

    Distant Sun

    March 27, 2017

    Season 2, Episode 17

    When a large bounty is put out on Supergirl, aliens from near and far attack National City intent on taking out the Woman of Steel. Guest star Lynda Carter returns as the President.

  • 17
    155
    19

    We Can Be Heroes

    January 30, 2017

    Season 2, Episode 10

    After Livewire seemingly breaks out of prison, Supergirl is intent on recapturing her. After training Mon-El, Supergirl takes him with her when she sees Livewire attack the NCPD but things go awry when Mon-El puts Supergirl before the citizens of National City. Meanwhile, James decides to come clean with Kara and M’Gann, has a psychic attack and collapses into a coma.

  • 18

    Season 2, Episode 22

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

  • 19
    148
    18

    Resist

    May 15, 2017

    Season 2, Episode 21

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

  • 20
    138
    21

    Season 2, Episode 20

    When an alien attacks National City, Supergirl and the DEO learn the alien is a Phorian, an otherwise peaceful race with telekinetic powers. Guardian gets a lead on the Phorian's address but instead of finding the culprit, he finds a very scared boy named Marcus. Marcus will only trust James so it is up to Guardian to stop the attacks on the city. Rhea's plan escalates.

  • 21
    142
    29

    Ace Reporter

    April 24, 2017

    Season 2, Episode 18

    Lena’s ex-boyfriend, Jack Spheer, comes to National City to unveil his big breakthrough in nano-technology, which has the potential to eradicate all diseases. Lena asks Kara to attend Jack’s conference with her for support. When Kara sees Snapper in attendance she’s inspired to tap back into her reporter skills and questions Jack on his discovery, which ultimately leads to a bigger investigation that puts everyone in danger.

  • 22
    175
    48

    Season 2, Episode 1

    In the season two premiere, Kara teams up with her cousin, Superman (TYLER HOECHLIN) to stop a new threat. And Hank is stunned by the pod that crashed last season.

  • 23
    199
    92

    World's Finest

    March 28, 2016

    Season 1, Episode 18

    Supergirl gains a new ally when The Flash (GRANT GUSTIN) crosses over from an alternate universe to help her battle Livewire and Silver Banshee.

  • 24
    84
    21

    Damage

    November 6, 2017

    Season 3, Episode 5

    When Morgan Edge (ADRIAN PASDAR) blames Lena (KATIE McGRATH) for the fallout from the Daxamite bomb, Kara teams up with Samantha (ODETTE ANNABLE) to clear Lena’s name.

  • 25
    122
    51

    Human for a Day

    December 7, 2015

    Season 1, Episode 7

    Kara must rely on their inner strength and courage when an earthquake strikes and she's lost her powers. Also, Alex's mistrust of Hank reaches a breaking point.