10 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 her powers after previously hiding them. The Danvers teach her to be careful with her powers, until she has to reveal them during an unexpected disaster, setting her on her journey of heroism.

Written by Sophie and last updated on jan 28, 2023.

PS: The following content contains spoilers!

PPS: I will admit that parts of this page was written with the help of AI - it makes my work so much easier to not start from a blank page!

Supergirl - S1E8

#15 - 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.

The episode was rated 7.80 from 3450 votes.

Supergirl - S2E2

#14 - 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.

The episode was rated 7.82 from 4670 votes.

Supergirl - S2E1

#13 - 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.

The episode was rated 7.82 from 5109 votes.

Supergirl - S2E21

#12 - Resist (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.

The episode was rated 7.83 from 3755 votes.

Supergirl - S2E3

#11 - 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.

The episode was rated 7.86 from 4616 votes.

Supergirl - S1E20

#10 - 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.

The episode was rated 7.87 from 3795 votes.

Supergirl - S1E16

#9 - 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.

The episode was rated 7.89 from 3425 votes.

Supergirl - S5E9

#8 - Crisis on Infinite Earths: Part One (I) (Season 5 - Episode 9)


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.

The episode was rated 7.92 from 1644 votes.

Supergirl - S6E20

#7 - Kara (Season 6 - Episode 20)

Supergirl is joined by familiar faces from the past to help her stop Lex and Nyxly for good. Meanwhile, Alex and Kelly prepare to walk down the aisle.

The episode was rated 7.93 from 14 votes.

Supergirl - S4E9

#6 - Elseworlds (III) (Season 4 - Episode 9)


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).

The episode was rated 7.93 from 2012 votes.

Supergirl - S6E19

#5 - The Last Gauntlet (Season 6 - Episode 19)

Supergirl and the super friends take drastic action after a loved one is kidnapped by Nyxly and Lex. An unlikely ally steps in to help the team.

The episode was rated 7.94 from 17 votes.

Supergirl - S3E9

#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.

The episode was rated 7.97 from 2389 votes.

Supergirl - S2E22

#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.

The episode was rated 8.01 from 3778 votes.

Supergirl - S3E8

#2 - Crisis on Earth-X (I) (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. 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).

The episode was rated 8.05 from 3415 votes.

Supergirl - S1E18

#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.

The episode was rated 8.17 from 4032 votes.

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