The Best Episodes of Supergirl

Last Updated: Apr 15, 2019

As Superman’s cousin, Kara Danvers (aka Supergirl) balances her work as a reporter for CatCo Worldwide Media with her work for the Department of Extra-Normal Operations (DEO), a super-secret government organization whose mission is to keep National City – and the Earth – safe from sinister threats..

Worlds Finest

#1 - Worlds Finest

Season 1 - Episode 18

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.

star 8.18
3,904 votes
Directors: Nick Gomez
Writers: Greg Berlanti, Andrew Kreisberg, Michael Grassi
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Crisis on Earth-X (1)

#2 - Crisis on Earth-X (1)

Season 3 - Episode 8

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. Part 1 - Supergirl - S03E08 Part 2 - Arrow - S06E08 Part 3 - The Flash - S04E08 Part 4 - DC's Legends of Tomorrow - S03E08

star 8.06
3,218 votes
Directors: Larry Teng
Writers: Andrew Kreisberg, Marc Guggenheim, Robert Rovner, Jessica Queller
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Nevertheless, She Persisted

#3 - Nevertheless, She Persisted

Season 2 - Episode 22

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

star 8.02
3,636 votes
Directors: Glen Winter
Writers: Andrew Kreisberg, Jessica Queller, Robert Rovner, Caitlin Parrish
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Reign

#4 - Reign

Season 3 - Episode 9

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.

star 7.99
2,224 votes
Directors: Glen Winter
Writers: Paula Yoo, Caitlin Parrish
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Elseworlds (3)

#5 - Elseworlds (3)

Season 4 - Episode 9

Third and last part of the crossover event with The Flash and Arrow.

star 7.99
1,631 votes
Directors: Jesse Warn
Writers: Marc Guggenheim, Derek Simon, Robert Rovner
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Falling

#6 - Falling

Season 1 - Episode 16

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.

star 7.90
3,307 votes
Directors: Larry Teng
Writers: Robert Rovner, Jessica Queller
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Better Angels

#7 - Better Angels

Season 1 - Episode 20

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.

star 7.87
3,671 votes
Directors: Larry Teng
Writers: Andrew Kreisberg, Ali Adler, Robert Rovner, Jessica Queller
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Welcome to Earth

#8 - Welcome to Earth

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.

star 7.87
4,464 votes
Directors: Rachel Talalay
Writers: Jessica Queller, Derek Simon
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Resist

#9 - Resist

Season 2 - Episode 21

The Daxamites launch a full invasion of National City, killing and arresting civilians. They also attack the DEO, but Alex and Winn manage to escape. Mon-El learns that he has to marry Lena in order to unite the people of Earth with Daxam.

star 7.84
3,613 votes
Writers: Jessica Queller, Derek Simon
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The Adventures of Supergirl

#10 - The Adventures of Supergirl

Season 2 - Episode 1

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.

star 7.83
4,950 votes
Directors: Glen Winter
Writers: Greg Berlanti, Andrew Kreisberg, Jessica Queller
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All About Eve

#11 - All About Eve

Season 4 - Episode 17

Supergirl must deal with the destructive aftermath of Lex's nefarious plans. Shocked at what Lex has created, Supergirl faces her biggest challenge yet.

star 7.83
696 votes
Directors: Ben Bray
Writers: Gabriel Llanas, Katie Rose Rogers, Brooke Pohl
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The Last Children of Krypton

#12 - The Last Children of Krypton

Season 2 - Episode 2

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.

star 7.83
4,535 votes
Directors: Glen Winter
Writers: Robert Rovner, Caitlin Parrish
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Hostile Takeover

#13 - Hostile Takeover

Season 1 - Episode 8

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.

star 7.82
3,319 votes
Directors: Karen Gaviola
Writers: Roberto Aguirre-Sacasa, Caitlin Parrish
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The House of L

#14 - The House of L

Season 4 - Episode 16

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.

star 7.81
808 votes
Directors: Carl Seaton
Writers: Dana Horgan, Eric Carrasco
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Battles Lost and Won

#15 - Battles Lost and Won

Season 3 - Episode 23

Supergirl and team take on Serena in an epic battle for Earth.

star 7.80
1,540 votes
Directors: Jesse Warn
Writers: Robert L. Rovner, Jessica Queller
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Manhunter

#16 - Manhunter

Season 1 - Episode 17

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.

star 7.79
3,297 votes
Directors: Chris Fisher
Writers: Derek Simon, Cindy Lichtman, Rachel Shukert
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Survivors

#17 - Survivors

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.

star 7.77
4,045 votes
Writers: Paula Yoo, Eric Carrasco
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O Brother, Where Art Thou?

#18 - O Brother, Where Art Thou?

Season 4 - Episode 15

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.

star 7.77
846 votes
Writers: Derek Simon, Nicki Holcomb
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Medusa (1)

#19 - Medusa (1)

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. Part 1 - Supergirl - S02E08 Part 2 - The Flash - S03E08 Part 3 - Arrow - S05E08 Part 4 - DC's Legends of Tomorrow - S02E07

star 7.77
5,088 votes
Writers: Jessica Queller, Derek Simon
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Bunker Hill

#20 - Bunker Hill

Season 4 - Episode 8

Nia has a powerful dream about Agent Liberty but refuses to look at it as a prophetic dream, Kara and Brainy try to persuade Nia to embrace her destiny, and Manchester Black pays Ben Lockwood a menacing visit.

star 7.77
1,098 votes
Directors: Kevin Smith
Writers: Rob Wright, Eric Carrasco
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Girl of Steel

#21 - Girl of Steel

Season 3 - Episode 1

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.

star 7.76
3,179 votes
Directors: Jesse Warn
Writers: Andrew Kreisberg, Robert Rovner, Caitlin Parrish
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The Darkest Place

#22 - The Darkest Place

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.

star 7.76
4,326 votes
Directors: Glen Winter
Writers: Robert Rovner, Paula Yoo
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City of Lost Children

#23 - City of Lost Children

Season 2 - Episode 20

The DEO investigates a Phorian woman who uses her telekinetic powers to cause rampage. James tracks down her son, Marcus, who refuses to speak with anyone but James, who spends time bonding with him. With Rhea's encouragement, Lena completes the matter transporter, which Rhea activates, causing Marcus to nearly destroy the office with his powers.

star 7.75
3,517 votes
Directors: Ben Bray
Writers: Robert Rovner, Gabriel Llanas, Anna Musky-Goldwyn
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Exodus

#24 - Exodus

Season 2 - Episode 15

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.

star 7.74
3,917 votes
Writers: Paula Yoo, Eric Carrasco
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Alex

#25 - Alex

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.

star 7.74
3,714 votes
Directors: Rob Greenlea
Writers: Eric Carrasco, Greg Baldwin
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