10 Best Episodes of Supergirl - Season 4

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 - S4E2

#15 - Fallout (Season 4 - Episode 2)

A shocking revelation causes chaos in National City. Supergirl sets out to capture Mercy Graves, while Alex takes control at the DEO. Back at CatCo, Kara decides to write an investigative story on Mercy and asks Lena if she can interview her as Mercy has ties to the Luthors. Meanwhile, Brainy meets Nia and the two end up in a precarious situation.

The episode was rated 7.58 from 1663 votes.

Supergirl - S4E18

#14 - Crime and Punishment (Season 4 - Episode 18)


Kara and Lena head to Stryker's Island to search for clues on how to defeat Lex. At the prison, Kara tries to befriend a nosy prisoner, Steve, who may have insight into what Lex was doing, while Lena studies an array of puzzles Lex left behind in the hopes of discovering his whereabouts. While there, a prison riot breaks out and Kara must find a way to stop the prisoners without revealing her secret identity as Supergirl. Meanwhile, Kelly encourages James to talk to someone for his PTSD, and Alex faces off against Ben Lockwood after he storms the DEO and acquires some powerful weapons to hunt Supergirl.

The episode was rated 7.60 from 1306 votes.

Supergirl - S4E6

#13 - Call to Action (Season 4 - Episode 6)

Everyone gathers for Thanksgiving but Kara is feeling down after her televised debate with Ben Lockwood about the anti-alien sentiment coursing through National City. Meanwhile, James and Lena argue about the best way to handle the Children of Liberty.

The episode was rated 7.60 from 1507 votes.

Supergirl - S4E7

#12 - Rather the Fallen Angel (Season 4 - Episode 7)


James falls in deeper with the Children of Liberty in his efforts to meet Agent Liberty. Meanwhile, Supergirl and Manchester Black follow a lead on Agent Liberty’s location, but things take a dark turn. Lena kicks off her first set of trials.

The episode was rated 7.63 from 1428 votes.

Supergirl - S4E10

#11 - Suspicious Minds (Season 4 - Episode 10)

Colonel Haley is upset after Supergirl responds to a distress call from a Navy ship that turned out to be a deadly alien attack. Colonel Haley reclaims the site as DEO territory and demands that Supergirl step aside. After Supergirl refuses to be told what to do, Haley refocuses her energy on finding out Supergirl's true identity and begins to interrogate all DEO agents, including Alex. Meanwhile, Brainiac-5 tries to persuade Nia to embrace her superpowers but she misinterprets his motives.

The episode was rated 7.63 from 1409 votes.

Supergirl - S4E19

#10 - American Dreamer (Season 4 - Episode 19)


As Kara doggedly works as a reporter to clear Supergirl's name, Dreamer picks up the slack as National City's protector, which leads to a showdown with Ben Lockwood. James takes drastic measures to relieve his PTSD.

The episode was rated 7.63 from 1285 votes.

Supergirl - S4E14

#9 - Stand and Deliver (Season 4 - Episode 14)

Between Ben Lockwood’s new push to stir up the anti-alien movement and the Elite’s desire to target Lockwood and his minions, Supergirl is concerned about the safety of the American people – both human and alien. When Lockwood organizes a rally, the aliens decide to peacefully protest. Brainiac and J’onn join the alien march while Supergirl and Dreamer patrol to keep everyone safe. Meanwhile, James picks up his camera again to cover the march for CatCo, and Hayley assigns Alex a job that clashes with her beliefs. When The Elite and Ben Lockwood stir up trouble at the rally, Supergirl is forced to take a stand.

The episode was rated 7.66 from 1328 votes.

Supergirl - S4E20

#8 - Will The Real Miss Tessmacher Please Stand Up? (Season 4 - Episode 20)


Kara and Lena head to Kaznia to hunt down Lex. However, Eve Tessmacher sets a trap for the duo that could ultimately reveal that Kara is Supergirl. Meanwhile, Alex gets a long-awaited phone call, James practices using his powers, and Ben Lockwood takes a dangerous stand inside the DEO.

The episode was rated 7.66 from 1277 votes.

Supergirl - S4E17

#7 - 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.

The episode was rated 7.76 from 1327 votes.

Supergirl - S4E8

#6 - Bunker Hill (Season 4 - Episode 8)


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.

The episode was rated 7.76 from 1395 votes.

Supergirl - S4E21

#5 - Red Dawn (Season 4 - Episode 21)

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.

The episode was rated 7.77 from 1214 votes.

Supergirl - S4E16

#4 - 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.

The episode was rated 7.77 from 1352 votes.

Supergirl - S4E22

#3 - The Quest for Peace (Season 4 - Episode 22)

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.

The episode was rated 7.78 from 1289 votes.

Supergirl - S4E15

#2 - 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.

The episode was rated 7.78 from 1368 votes.

Supergirl - S4E9

#1 - 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.

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