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    The fourth season of Supergirl premiered on October 14, 2018, and concluded on May 19, 2019. The season consists of 22 episodes.

    Synopsis[edit | hide | hide all]

    Season Three saw Supergirl stop Reign and the other Worldkillers' threat to humanity and our planet, and in the process, Kara was shocked to find her mother Alura alive and living in a salvaged Argo City that survived the destruction of Krypton. Reconnecting with her past caused Kara to realize that her true home is now here on Earth, where big changes are taking place for her and all of her friends in National City – and also, it appears, for a doppelganger in Russia! With a wave of anti-alien sentiment roiling the country led by Agent Liberty; and a new command at the DEO, Colonel Haley – Kara returns to CatCo, where she mentors young reporter Nia Nal, who evolves into a superhero herself. Season four promises to be full of surprises, action, adventure and lots of big revelations for Supergirl, Alex, James, J'onn, Lena, and Brainiac-5.[1]

    Cast[edit | hide]

    Main Cast[edit | hide]

    Recurring Cast[edit | hide]

    Episodes[edit | hide]

    # Episode Title Directed by Story By Teleplay By Episode Airdate
    1 American Alien Jesse Warn Robert Rovner & Jessica Queller Gabriel Llanas & Aadrita Mukerji October 14, 2018
    Diving back into reporting, Kara welcomes a new cub reporter to CatCo. Meanwhile, James and Lena argue about James' impending indictment for acting as the vigilante Guardian, while Alex and Brainy struggle to get in sync at the DEO. Supergirl is called into action when remnants of the anti-alien terrorist organization Cadmus try to assassinate pro-alien leaders, but their endgame turns out to be much more sinister than she expected. J'onn relishes his peaceful new life, but an outing with an old friend causes him concern.
    2 Fallout (Supergirl) Harry Jierjian Dana Horgan Maria Maggenti & Daniel Beaty October 21, 2018
    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.
    3 Man of Steel (Supergirl) Jesse Warn Rob Wright & Derek Simon October 28, 2018
    Ben Lockwood didn't always hate aliens. Through a series of incidents, and input from his anti-alien father, Ben slowly transforms from a mild-mannered professor into the villainous Agent Liberty of today.
    4 Ahimsa Armen V. Kevorkian Eric Carrasco Katie Rose Rogers & Jess Kardos November 4, 2018
    When Supergirl needs help, Alex asks Lena and Brainiac to team up. Meanwhile, J'onn questions his decision to quit the DEO. However, after running into Manchester Black, he realizes there are a lot of ways to help his fellow aliens during this tumultuous time.
    5 Parasite Lost David McWhirter Maria Maggenti & Aadrita Mukerji November 11, 2018
    Colonel Haley makes a surprising decision regarding Supergirl. Kara writes a series of articles highlighting aliens in National City in the hopes that humans will stop being so fearful of them. Unfortunately, the article puts some of the aliens in harm's way.
    6 Call to Action Antonio Negret Gabriel Llanas & Daniel Beaty November 18, 2018
    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.
    7 Rather the Fallen Angel Chad Lowe Dana Horgan & Katie Rose Rogers November 25, 2018
    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.
    8 Bunker Hill Kevin Smith Rob Wright & Eric Carrasco December 2, 2018
    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.
    9 Elseworlds, Part 3 Jesse Warn Marc Guggenheim Derek Simon & Robert Rovner December 11, 2018
    Supergirl, The Flash, Green Arrow, and Superman engage in the battle of their lives.
    10 Suspicious Minds Rachel Talalay Maria Maggenti & Gabriel Llanas January 20, 2019
    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.
    11 Blood Memory Shannon Kohli Jessica Queller & Dana Horgan January 27, 2019
    Kara joins Nia on a trip to Nia's hometown to visit her family during the town's annual Harvest Festival. While home, Nia's mother encourages her daughter to embrace her destiny. Meanwhile, Alex deals with a street drug that is turning people violent and giving them temporary superpowers.
    12 Menagerie Stefan Pleszczynski Robert Downer Daniel Beaty & Greg Baldwin February 17, 2019
    With his P.I. shingle newly hung outside his office, J'onn welcomes new clients. Trying to take her mind off what happened at the DEO, Kara decides to team up with J'onn on his latest assignment, which unfortunately ends up tying directly into Alex's current investigation that involves the villain Menagerie. Meanwhile, Lena shares some news with James, but his reaction isn't what she expected. Nia invites Brainy to her Valentine's Day party.
    13 What's So Funny About Truth, Justice, and the American Way? Alexis Ostrander Eric Carrasco & Aadrita Mukerji March 3, 2019
    Manchester Black breaks out of prison with the help of his new team, The Elite, who are set on punishing the anti-alien forces. Supergirl pulls double duty as she tries to apprehend Manchester Black and his team as well as deal with a shocking new development with Ben Lockwood.
    14 Stand and Deliver Andi Armaganian Rob Wright & Jess Kardos March 10, 2019
    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.
    15 O Brother, Where Art Thou? Tawnia McKiernan Derek Simon & Nicki Holcomb March 17, 2019
    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.
    16 The House of L Carl Seaton Dana Horgan & Eric Carrasco March 24, 2019
    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.
    17 All About Eve (Supergirl) Ben Bray Gabrial Llanas Katie Rose Rogers & Brooke Phol March 31, 2019
    Supergirl must deal with the destructive aftermath of Lex's nefarious plans. Shocked at what Lex has created, Supergirl faces her biggest challenge yet
    18 Crime and Punishment Antonio Negret Rob Wright Lindsay Sturman April 21, 2019
    Supergirl and Lena head to Stryker's Island to search for clues on how to defeat Lex. At the prison, Supergirl tries to befriend a nosy prisoner, Steve, who may have insight into what Lex was doing, but he and all of the prisoners regard her as a traitor to the country and refuse to talk to her. Lena realizes Lex left behind clues for her and deciphering them could be the key to his whereabouts. Meanwhile, Kelly encourages James to talk to someone about his PTSD, and Alex faces off against Ben Lockwood after he storms the DEO and acquires some powerful weapons to hunt Supergirl.
    19 American Dreamer David Harewood Dana Horgan Daniel Beaty & Jess Kardos April 28, 2019
    As Kara (Melissa 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.
    20 Will the Real Miss Tessmacher Please Stand Up? Shannon Kohli Derek Simon Katie Rose Rogers & Natalie Abrams May 5, 2019
    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.
    21 Red Dawn Alexis Ostrander Lindsay Sturman Gabrial Llanas & Eric Carrasco May 12, 2019
    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.
    22 The Quest for Peace Jesse Warn Robert Rovner & Jessica Queller Rob Wright & Derek Simon May 19, 2019
    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.

    Soundtrack[edit | hide]

    On June 4, 2021, an album consisting of incidental music from the season was released digitally on Spotify and Amazon Music.

    Gallery[edit | hide]

    Logos and Title Cards[edit | hide]

    Promotional Images[edit | hide]

    References[edit | hide]

    Supergirl
    Season 1

    Pilot (Supergirl) Stronger Together Fight or Flight Livewire How Does She Do It? Red Faced Human for a Day Hostile Takeover Blood Bonds Childish Things Strange Visitor from Another Planet Bizarro (Supergirl) For the Girl Who Has Everything Truth, Justice and the American Way Solitude (Supergirl) Falling (Supergirl) Manhunter Worlds Finest Myriad Better Angels

    Season 2

    The Adventures of Supergirl The Last Children of Krypton Welcome to Earth Survivors Crossfire (Supergirl) Changing The Darkest Place Medusa Supergirl Lives We Can Be Heroes The Martian Chronicles Luthors Mr. & Mrs. Mxyzptlk Homecoming (Supergirl) Exodus (Supergirl) Star-Crossed Distant Sun Ace Reporter Alex City of Lost Children Resist Nevertheless, She Persisted

    Season 3

    Girl of Steel Triggers Far from the Tree The Faithful Damage Midvale Wake Up Crisis on Earth-X, Part 1 Reign Legion of Super-Heroes Fort Rozz For Good Both Sides Now Schott Through the Heart In Search of Lost Time Of Two Minds Trinity Shelter from the Storm The Fanatical Dark Side of the Moon Not Kansas Make It Reign Battles Lost and Won

    Season 4

    American Alien Fallout (Supergirl) Man of Steel (Supergirl) Ahimsa Parasite Lost Call to Action Rather the Fallen Angel Bunker Hill Elseworlds, Part 3 Suspicious Minds Blood Memory Menagerie What's So Funny About Truth, Justice, and the American Way? Stand and Deliver O Brother, Where Art Thou? The House of L All About Eve (Supergirl) Crime and Punishment American Dreamer Will the Real Miss Tessmacher Please Stand Up? Red Dawn The Quest for Peace

    Season 5

    Event Horizon Stranger Beside Me Blurred Lines In Plain Sight Dangerous Liaisons (Supergirl) Confidence Women Tremors (Supergirl) The Wrath of Rama Khan Crisis on Infinite Earths: Part One The Bottle Episode Back from the Future: Part One Back from the Future: Part Two It's a Super Life The Bodyguard Reality Bytes Alex in Wonderland Deus Lex Machina The Missing Link Immortal Kombat

    Season 6

    Rebirth (Supergirl) A Few Good Women Phantom Menaces Lost Souls (Supergirl) Prom Night! Prom Again! Fear Knot Welcome Back, Kara! Dream Weaver Still I Rise Mxy in the Middle Blind Spots The Gauntlet Magical Thinking Hope for Tomorrow Nightmare in National City I Believe in a Thing Called Love Truth or Consequences The Last Gauntlet Kara (Supergirl)

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