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 and becoming part of the CW Arrowverse.
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.
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.
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.
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.
Season 1, Episode 13
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.
Season 2, Episode 22
Supergirl challenges Rhea to battle to save National City. Meanwhile, Superman returns and Cat Grant offers Supergirl some sage advice.
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.
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.
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.
Season 1, Episode 1
After 12 years of keeping her powers a secret on Earth, Kara Zor-El, Superman's cousin, decides to finally embrace her superhuman abilities and be the hero she was always meant to be.
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.
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.
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.
Season 3, Episode 2
Psi, a thief with psychic powers, attacks National City. Able to immobilize people by tapping into their worst fears, Psi proves a formidable opponent for Supergirl. Meanwhile, James and Lena are at an impasse, and Samantha starts her new job at L-Corp.
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.
The crossover continues on The Flash S03E08 Invasion! (II), Arrow S05E08 Invasion! (III) and DC's Legends of Tomorrow S02E07 Invasion! (IV).
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.
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.
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.
Season 2, Episode 16
A new villain comes to National City, putting Supergirl on high alert. Meanwhile, Winn’s girlfriend, Lyra, gets Winn in trouble with the law. Maggie attempts to help Winn but old loyalties get in the way. The Music Meister attacks Supergirl.
The crossover continues on The Flash S03E17 Duet (II).
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.
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.
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.
Season 2, Episode 14
When Jeremiah Danvers is rescued from Cadmus, Alex and Kara are thrilled to have their father back. The Danvers arrange a family dinner to celebrate but things go awry when a suspicious Mon-El starts to question Jeremiah about his sudden return.
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).
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.
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.