Superheroes The Best Episodes of Supergirl  

Ranker TV
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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.

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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list ordered by

1
73 18
World's Finest is listed (or ranked) 1 on the list The Best Episodes of Supergirl
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.

2
64 13
Crisis on Earth-X, Part 1 is listed (or ranked) 2 on the list The Best Episodes of Supergirl
Season 3 Episode 8: When villains from Earth-X attack the wedding ceremony of Barry Allen and Iris West, the Green Arrow, Supergirl, The Flash and White Canary unite their teams to save the world.

3
57 11
Midvale is listed (or ranked) 3 on the list The Best Episodes of Supergirl
Season 3 Episode 6: Kara and Alex head home to Midvale, where Kara recalls a painful memory of a childhood friend’s death and how that traumatic experience brought the sisters closer together.

4
42 7
For the Girl Who Has Everythin... is listed (or ranked) 4 on the list The Best Episodes of Supergirl
Season 1 Episode 13: While Alex, Hank and the DEO must fend off a Kryptonian attack, Kara is trapped by a parasitic alien in a dream world where her home planet was never destroyed.

5
35 5
Pilot is listed (or ranked) 5 on the list The Best Episodes of Supergirl
Season 1 Episode 1: In the series premiere, Superman's cousin, Kara (MELISSA BENOIST) finally embraces her superhuman abilities to become the hero she was always meant to be.

6
51 13
Mr. & Mrs. Mxyzptlk is listed (or ranked) 6 on the list The Best Episodes of Supergirl
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.

7
60 19
Falling is listed (or ranked) 7 on the list The Best Episodes of Supergirl
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.

8
47 11
Nevertheless, She Persisted is listed (or ranked) 8 on the list The Best Episodes of Supergirl
Season 2 Episode 22: In the second season finale, Supergirl challenges Rhea in battle to save National City. Meanwhile, Cat Grant offers Supergirl some sage advice and Superman returns.

9
35 6
The Adventures of Supergirl is listed (or ranked) 9 on the list The Best Episodes of Supergirl
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.

10
34 6
Human for a Day is listed (or ranked) 10 on the list The Best Episodes of Supergirl
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.

11
36 8
Alex is listed (or ranked) 11 on the list The Best Episodes of Supergirl
Season 2 Episode 19: When Alex is kidnapped, Supergirl and Maggie must work together to save her, even though they’ve always had different approaches to apprehending criminals.

12
39 11
Girl of Steel is listed (or ranked) 12 on the list The Best Episodes of Supergirl
Season 3 Episode 1: In the season three premiere, Kara (MELISSA BENOIST) deals with the loss of Mon-El by focusing all her energy on being Supergirl and the mysterious new threat to National City.

13
35 9
Medusa is listed (or ranked) 13 on the list The Best Episodes of Supergirl
Season 2 Episode 8: When Cadmus unleashes a lethal virus for aliens, Kara enlists Lena Luthor’s help. And Barry Allen arrives with Cisco Ramon to ask for Kara’s help against an alien invasion.

14
26 4
Triggers is listed (or ranked) 14 on the list The Best Episodes of Supergirl
Season 3 Episode 2: Psi (YAEL GROBGLAS), a thief with psychic powers attacks National City by immobilizing people with their worst fears. Meanwhile, Samantha starts at L-Corp.

15
32 9
Bizarro is listed (or ranked) 15 on the list The Best Episodes of Supergirl
Season 1 Episode 12: Kara Kara faces off against her mirror image when Bizarro (HOPE LAUREN), a twisted version of Supergirl, sets out to destroy her. Also, Kara grows closer with Cat's son, Adam.

16
23 4
Wake Up is listed (or ranked) 16 on the list The Best Episodes of Supergirl
Season 3 Episode 7: Eager for some understanding of the changes she has been experiencing, Samantha looks to her estranged mother (BETTY BUCKLEY) for answers.

17
29 10
Star-Crossed is listed (or ranked) 17 on the list The Best Episodes of Supergirl
Season 2 Episode 16: TERI HATCHER and KEVIN SORBO guest star as new villains who come to National City, while DARREN CRISS makes hid debut as The Music Meister.

18
24 6
Childish Things is listed (or ranked) 18 on the list The Best Episodes of Supergirl
Season 1 Episode 10: Kara does her best to support Winn when his father, the Supervillain Toyman (HENRY CZERNY), breaks out of prison and seeks out his son for unknown reasons.

19
21 4
The Last Children of Krypton is listed (or ranked) 19 on the list The Best Episodes of Supergirl
Season 2 Episode 2: Cadmus attacks National City with a kryptonite-powered villain who ends up seriously hurting Supergirl. And Kara meets her new boss, Snapper Carr (IAN GOMEZ).

20
21 5
How Does She Do It? is listed (or ranked) 20 on the list The Best Episodes of Supergirl
Season 1 Episode 5: Kara is pulled in opposite directions when she babysits Cat's son, Carter (LEVI MILLER), while trying to stop a series of bombings. And Lucy Lane (JENNA DEWANT TATUM) appears.

21
19 4
The Faithful is listed (or ranked) 21 on the list The Best Episodes of Supergirl
Season 3 Episode 4: Kara investigates a secretive new group whose leader, Thomas Coville (CHAD LOWE) has a mysterious connection to Supergirl. Meanwhile, J’onn confesses an old secret.

22
19 4
Livewire is listed (or ranked) 22 on the list The Best Episodes of Supergirl
Season 1 Episode 4: Kara's Thanksgiving may be ruined when her foster mother comes for a tense visit and a volatile CatCo employee (BRIT MORGAN) is transformed into the villainous Livewire.

23
23 8
Distant Sun is listed (or ranked) 23 on the list The Best Episodes of Supergirl
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.

24
19 5
Manhunter is listed (or ranked) 24 on the list The Best Episodes of Supergirl
Season 1 Episode 17: J'onn J'onzz reveals the details of meeting Kara and Alex's father, Dr. Jeremiah Danvers (DEAN CAIN), and assuming Hank Henshaw's identity.

25
17 4
Resist is listed (or ranked) 25 on the list The Best Episodes of Supergirl
Season 2 Episode 21: Cat Grant (CALISTA FLOCKHART) returns to National City. Meanwhile, Supergirl grapples with whether or not to obey orders from the President regarding Rhea’s latest actions.