The BEST episodes written by Derek Simon
#1 - Crisis on Infinite Earths (1)
Supergirl - 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. The crossover continues on Batwoman S1E09, The Flash S6E09, Arrow S8E08, and Legends of Tomorrow S05E01.
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#3 - Resist
Supergirl - Season 2 - Episode 21
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.
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#4 - Welcome to Earth
Supergirl - 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.
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#7 - For the Girl Who Has Everything
Supergirl - 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.
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#8 - Medusa (1)
Supergirl - 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. 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
#9 - O Brother, Where Art Thou?
Supergirl - 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.
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#10 - Trinity
Supergirl - Season 3 - Episode 17
Still reeling after learning about Lena’s secret, Supergirl asks Guardian for a favor that could alter his relationship with Lena forever. Meanwhile, with all three Worldkillers united, Supergirl and the team brace for an epic battle.
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#14 - Legion of Superheroes
Supergirl - Season 3 - Episode 10
Struggling to heal from her injuries inflicted by Reign, Supergirl remains in a dreamlike state, unable to be reached. Mon-El recruits one of the Legion members, Brainiac-5, to try to bring her back. Meanwhile, Reign continues her rampage on the city so the DEO teams up with the Legion of Super-Heroes to try to stop her.
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#15 - It's a Super Life
Supergirl - Season 5 - Episode 13
Mxyzptlk returns with a proposition for Kara - what if she could go back in time and tell Lena her secret before Lex did, would things turn out different? Looking back over key moments throughout the series, Kara must decide if she wants to change history to become friends with Lena again.
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#16 - Will The Real Miss Tessmacher Please Stand Up?
Supergirl - 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 D.E.O.
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#17 - Homecoming
Supergirl - 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.
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#20 - Immortal Kombat
Supergirl - Season 5 - Episode 19
Supergirl realizes that in order to stop Lex and Leviathan she must work with the one person she never thought she'd trust again - Lena. Nia keeps dreaming about Brainy but struggles with what the dreams are trying to tell her. Meanwhile, Brainy realizes there is only one way to stop Lex.
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#22 - Schott Through the Heart
Supergirl - Season 3 - Episode 14
When Winn’s father dies, his estranged mother, Mary, reappears trying to reconnect and to explain why she abandoned him all those years ago. Winn is too embittered from his rough childhood to forgive her but when a copycat Toyman attacks, the two must work together to stop him. Mon-El tells Kara something important about the Worldkillers, and Alex becomes suspicious of Myr’nn’s recent behavior.
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#24 - A Few Good Women
Supergirl - Season 6 - Episode 2
As the stakes with Lex are raised higher than ever before, Lena must decide how far she is willing to go to stop her brother. Meanwhile, Supergirl and the team are faced with a challenge unlike anything they've ever dealt with before and it brings Alex to her breaking point.
Watch Now:Apple TV
#25 - Magical Thinking
Supergirl - Season 6 - Episode 14
Lena is uncertain about using her magical abilities to help Supergirl retrieve the second totem from Nyxly. William struggles to write a story on the Super Friends that makes both the heroes and Andrea happy. Meanwhile, Kelly is thrilled Esme has found a new home, but things go awry and the little girl's future is put in danger.
Watch Now:Apple TV