The BEST episodes of Supergirl

Every episode of Supergirl ever, ranked from best to worst by thousands of votes from fans of the show. The best episodes of Supergirl!

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

Last Updated: 11/30/2023Network: The CWStatus: Ended
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Worlds Finest
star
8.05
3922 votes

#1 - Worlds Finest

Season 1 - Episode 18 - Aired 3/28/2016

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.

Directors: Nick Gomez
Watch Now:AmazonApple TV
Crisis on Earth-X (1)
star
8.04
3363 votes

#2 - Crisis on Earth-X (1)

Season 3 - Episode 8 - Aired 11/27/2017

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.

Directors: Larry Teng
Watch Now:AmazonApple TV
Crisis on Infinite Earths (1)
star
7.93
1699 votes

#3 - Crisis on Infinite Earths (1)

Season 5 - Episode 9 - Aired 12/8/2019

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. The crossover continues on Batwoman S1E09, The Flash S6E09, Arrow S8E08, and Legends of Tomorrow S05E01.

Directors: Jesse Warn
Watch Now:AmazonApple TV
Reign
star
7.90
2417 votes

#4 - Reign

Season 3 - Episode 9 - Aired 12/4/2017

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.

Directors: Glen Winter
Watch Now:AmazonApple TV
Elseworlds (3)
star
7.89
2075 votes

#5 - Elseworlds (3)

Season 4 - Episode 9 - Aired 12/11/2018

Supergirl, The Flash, Green Arrow and Superman face the battle of their lives. The crossover started on The Flash S05E09 and Arrow S07E09.

Directors: Jesse Warn
Watch Now:AmazonApple TV
Falling
star
7.87
3360 votes

#6 - Falling

Season 1 - Episode 16 - Aired 3/14/2016

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.

Directors: Larry Teng
Watch Now:AmazonApple TV
Nevertheless, She Persisted
star
7.85
3523 votes

#7 - Nevertheless, She Persisted

Season 2 - Episode 22 - Aired 5/22/2017

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

Directors: Glen Winter
Watch Now:AmazonApple TV
Better Angels
star
7.82
3614 votes

#8 - Better Angels

Season 1 - Episode 20 - Aired 4/18/2016

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.

Directors: Larry Teng
Watch Now:AmazonApple TV
The Last Children of Krypton
star
7.81
4338 votes

#9 - The Last Children of Krypton

Season 2 - Episode 2 - Aired 10/17/2016

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.

Directors: Glen Winter
Watch Now:AmazonApple TV
Resist
star
7.80
3399 votes

#10 - Resist

Season 2 - Episode 21 - Aired 5/15/2017

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.

Watch Now:AmazonApple TV
Welcome to Earth
star
7.79
4280 votes

#11 - Welcome to Earth

Season 2 - Episode 3 - Aired 10/24/2016

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.

Directors: Rachel Talalay
Watch Now:AmazonApple TV
The Adventures of Supergirl
star
7.77
4781 votes

#12 - The Adventures of Supergirl

Season 2 - Episode 1 - Aired 10/10/2016

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.

Directors: Glen Winter
Watch Now:AmazonApple TV
Hostile Takeover
star
7.77
3503 votes

#13 - Hostile Takeover

Season 1 - Episode 8 - Aired 12/14/2015

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.

Directors: Karen Gaviola
Watch Now:AmazonApple TV
The Quest for Peace
star
7.74
1341 votes

#14 - The Quest for Peace

Season 4 - Episode 22 - Aired 5/19/2019

Lex Luthor descends upon Washington, D.C. 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.

Directors: Jesse Warn
Watch Now:AmazonApple TV
Manhunter
star
7.74
3306 votes

#15 - Manhunter

Season 1 - Episode 17 - Aired 3/21/2016

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.

Directors: Chris Fisher
Watch Now:AmazonApple TV
The House of L
star
7.72
1417 votes

#16 - The House of L

Season 4 - Episode 16 - Aired 3/24/2019

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.

Directors: Carl Seaton
Watch Now:AmazonApple TV
Bunker Hill
star
7.72
1453 votes

#17 - Bunker Hill

Season 4 - Episode 8 - Aired 12/2/2018

Nia has a powerful dream about Agent Liberty but refuses to look at it as a prophetic dream and pushes it aside. After noticing something is bothering Nia, Kara enlists Brainy’s help, and the two try to persuade Nia to embrace her destiny. Meanwhile, Manchester Black pays Ben Lockwood a menacing visit.

Directors: Kevin Smith
Watch Now:AmazonApple TV
For the Girl Who Has Everything
star
7.71
3371 votes

#18 - For the Girl Who Has Everything

Season 1 - Episode 13 - Aired 2/8/2016

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.

Directors: Dermott Downs
Watch Now:AmazonApple TV
The Darkest Place
star
7.71
4170 votes

#19 - The Darkest Place

Season 2 - Episode 7 - Aired 11/21/2016

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.

Directors: Glen Winter
Watch Now:AmazonApple TV
Alex
star
7.71
3539 votes

#20 - Alex

Season 2 - Episode 19 - Aired 5/1/2017

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.

Directors: Rob Greenlea
Watch Now:AmazonApple TV
Battles Lost and Won
star
7.71
1788 votes

#21 - Battles Lost and Won

Season 3 - Episode 23 - Aired 6/18/2018

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

Directors: Jesse Warn
Watch Now:AmazonApple TV
O Brother, Where Art Thou?
star
7.71
1440 votes

#22 - O Brother, Where Art Thou?

Season 4 - Episode 15 - Aired 3/17/2019

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.

Directors: Tawnia McKiernan
Watch Now:AmazonApple TV
Medusa (1)
star
7.70
4751 votes

#23 - Medusa (1)

Season 2 - Episode 8 - Aired 11/28/2016

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. Barry Allen and Cisco Ramon seek Kara’s help with an alien invasion on their Earth. The crossover continues on The Flash S03E08, Arrow S05E08, and DC's Legends of Tomorrow S02E07.

Watch Now:AmazonApple TV
Red Dawn
star
7.70
1293 votes

#24 - Red Dawn

Season 4 - Episode 21 - Aired 5/12/2019

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.

Directors: Alexis Ostrander
Watch Now:AmazonApple TV
City of Lost Children
star
7.70
3342 votes

#25 - City of Lost Children

Season 2 - Episode 20 - Aired 5/8/2017

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.

Directors: Ben Bray
Watch Now:AmazonApple TV