Supergirl: Season 4 (2018 - 2019)


Season 4

Critics Consensus

Though it's a little tonally inconsistent, Supergirl's fourth season still soars thanks to strong, relevant writing brought to life by its charming cast.



Critic Ratings: 7


Audience Score

User Ratings: 649

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Air date: Oct 14, 2018

In the Season 4 premiere, 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.

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Air date: Oct 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.

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Air date: Oct 28, 2018

Ben Lockwood did not always hate aliens. Ben slowly transforms from a mild-mannered professor into the villainous Agent Liberty of today through a series of events and input from his anti-alien father.

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Air date: Nov 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.

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Air date: Nov 11, 2018

Colonel Haley makes a surprising decision regarding Supergirl. Kara writes s 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.

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Air date: Nov 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.

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Air date: Nov 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.

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Air date: Dec 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.

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Air date: Dec 11, 2018

Supergirl, the Flash, Green Arrow and Superman engage in the battle of their lives.

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Air date: Jan 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.

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Tv Season Info

Season 4 of the drama series opens with Kara (Melissa Benoist) going back to her reporting job at CatCo while still working with the DEO, proving that she can both be a superhero and have a normal life. Meanwhile, an attempt on President Marsdin's (Lynda Carter) life exposes her as an alien, causing chaos in National City; Mercy (Rhona Mitra) and Otis (Robert Baker), the siblings responsible for the crime, manage to escape and become a threat to the DEO. With humans becoming more and more anti-alien, Kara and her friends try their best at showing that aliens and people with superpowers aren't dangerous but can be exceptional allies against forces of evil.

News & Interviews for Supergirl: Season 4

Critic Reviews for Supergirl Season 4

All Critics (7) | Top Critics (1)

For now it's worth celebrating just how strong Supergirl's fourth season has been.

May 20, 2019 | Rating: B | Full Review…
Top Critic

It also sowed the seeds for the incoming "Crisis On Infinite Earths" crossover that's sure to shake up the Arrowverse like never before when it arrives this fall.

May 20, 2019 | Full Review…

The season 4 finale of Supergirl, "The Quest For Peace," masterfully resolved all of its outstanding storylines.

May 20, 2019 | Full Review…

A sincerely good conclusion to a season that ended up being one of the most entertaining seasons of supershows the CW has done.

May 20, 2019 | Full Review…

There are so many threads that they tried to conclude at once, which meant that none of them wrapped up with any sort of satisfaction.

May 20, 2019 | Full Review…

As Supergirl's fourth season prepares for the reintroduction of Lex Luthor to a new generation, the series is as strong as it's ever been.

Nov 7, 2018 | Full Review…

Ultimately, Supergirl seems to have a sense of where it's going this season, but the question is whether we'll be excited to go with it.

Oct 17, 2018 | Rating: 7/10 | Full Review…

Audience Reviews for Supergirl: Season 4

  • Sep 29, 2020
    Loved the first 3 seasons, however, the show is now promoting social justice issues and is the poorer for it. Such a shame this once great series has decided to go down this route :(
  • Aug 09, 2020
    Just wow this is great
  • Aug 03, 2020
    There are some story elements that don't pay off this year but the new Lex brings a lot to the fun show.
  • May 10, 2020
    Is this the best show ever? no. do i think this show deserves better attention? yes!! it's a sweet show, not bogged down by the darkness of the DCEU superman blunders. it tackles topical issues, making it accessible to the probably younger audience watching. it's very inclusive, with all types of people. melissa benoist soars in this role, still bringing that perky optimism and heart she has been bringing since episode one season one. don't be so quick to hate on this show, it's truly good storytelling and has a lot of charm and heart
  • May 02, 2020
    The SUPERGIRL series finally matures in this season, with emotional writing for characters stepping up quite a bit. It also brings more topical issues using the fantastic superhero world. Kara Danvers and her entourage of friends and family plug along dealing with personal and public issues. It's pretty much the days in the life of the Danvers (including extended family) and how they work to keep the world right and safe for everyone. This season is split into three parts. Part I is the pickup after season 3. Part II is after the Lockwood episode. Part III is after the Luthor episode. The villain episodes are excellent and justifiably define the entire season by giving the villains life and depth. To see what they're up to and how they've gotten where they are creates a richer story.
  • Apr 09, 2020
    I really love the Supergirl TV Show! Seasons 1-3 were the really best show I´ve watched in the last years. But with the comeback of Lex Luther the series really kicked me off. I had Zero fun watching it since then.. Oh and I totally HATE the fact, that Lina hates Kara now. WTF!?
  • Mar 03, 2020
    Boring and uninspired. Oh and awful special effects.
  • Feb 16, 2020
    I just binge-watched this entire season on Netflix after a long time away from the show, and I don't think I could have liked it more. The writing is so relevant and thoughtful, and these characters have grown so much. The storyline was exhausting at times because it's so close to real world struggles, but isn't that what makes fantasy so special? Get you to think and find new perspectives on reality the bias of your own preconceived ideas? I think they treated the themes of divisiveness, racism and being left behind by the society with great empathy and "hearing from all sides," which is something Kara herself brings up the importance of when talking about the role of journalism. Our real world could definitely learn a few lessons from this.
  • Feb 13, 2020
    With the usual solid acting from the cast, there's a stronger dialogue that helps tone down the show's cheesy CW nature in its fourth season just a bit. What's more is it's return to form of immediate suspense that quickly reminded me why I was so into this show since the first season. Warner Bros, y'all better bring Supergirl into the DCEU!
  • Feb 12, 2020
    For a show held in regard to the turbulent quality of the Arrowverse continuity, Supergirl's fourth outing was delightfully well-written and gracefully paced. It has its cranks – which you can expect for an Arrowverse show – but for the most part, this season delivered on many fronts. From the growth of its assorted roster of characters – the true backbone of which is in the beautiful relationship of the Danvers sisters and the delicate dynamic between Kara and Lena Luthor – to its incredibly compelling villains. Ben Lockwood's Agent Liberty was an interesting iteration of the character and his anti-hero efforts in the first half kept my intrigue for what would come in the latter. He was particularly pleasant to watch and Sam Witwer brought him to the screens with finesse. Manchester Black was truly a gift as a consequence of the plot's events, especially in the fresh characterisation of J'onn J'onzz and his travails to embrace his identity as the Martian Manhunter. It truly reimagined a character who has been woefully undervalued by the show in the past. Lex Luthor, on the other hand, was the highlight of Season Four, being the masterful and commanding intelligent artist he is known to be. Though I would have loved to have seen more of Red Daughter and the Kasnia storyline, Lex is the main villain and his manipulations and actions brought together the season's events in a way only a Luthor can do. Though I was sceptical of Jon Cryer's casting of such an iconic character – and his portrayal was questionable at points – he truly embodied a Lex Luthor we have been wanting to see in live-action. Often, I'm not a fan of using politics in a show just to appear as "woke", not because I don't think it has any place in entertainment media but because, if done poorly, it will depreciate the essence of the show and the integrity of the story (and there have been several TV series which have done this poorly). But while this season has a political undertone, it's done cleverly and it is built up in such a way that shows you how domineering Lex Luthor can be. Likewise, the story wasn't only appropriate, it was meaningful for its characters and we saw those characters grow as a consequence. We get to see Kara Danvers shine not only donning the cape of Supergirl but flexing her muscles as a member of the fourth estate. We get to see the brilliance of Lena Luthor in her solitude and insecurities, alongside her struggles to incorporate that with her developing trust in other people. And newcomer Nia Nal is a welcome inclusion to the roster. The way the story progressed this season – and seeing the characters grow with it – really gave the show a personality that its previous seasons have struggled to do. For an Arrowverse show, Supergirl's Season Four is incredible (perhaps even one of the best in the interconnected universe). With my only complaints being the lapse in dialogue and the lack of quality visual effects – especially for its VFX-heavy season finale – I can truly say the story is enough to keep you entertained.

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