# Supergirl (TV series)

Supergirl is an American superhero drama television series developed by Ali Adler, Greg Berlanti and Andrew Kreisberg that aired on CBS and later The CW from October 26, 2015, to November 9, 2021. Based on the DC Comics character created by Otto Binder and Al Plastino, the series follows Kara Zor-El (played by Melissa Benoist), Superman's cousin, and one of the last surviving Kryptonians from the planet Krypton.
As Supergirl, Kara uses her powers to protect National City and later becomes a key member of the Arrowverse—a shared universe of interconnected superhero shows. Initially set on a different Earth from the other Arrowverse series, Supergirl's storyline became intertwined with the rest of the franchise during a multiverse event in its fifth season, which resulted in the merging of all Earths in the Arrowverse.
The series was officially picked up on May 6, 2015, after receiving a full series commitment in September 2014. Following a full season order on November 30, 2015, it transitioned to The CW for its second season onward.
Supergirl received mixed-to-positive reviews from television critics, with praise for its creative direction and cast performances (especially Benoist), though its handling of relevant political themes such as empowerment and social justice was criticized. It won the Most Exciting New Series at the 5th Critics' Choice Television Awards in 2015. The television series Superman & Lois was developed as a direct spin-off of Supergirl with Tyler Hoechlin and Elizabeth Tulloch reprising their Arrowverse roles; however, after COVID-19 restrictions led to a planned first season crossover with Supergirl being cancelled, creative redevelopment led to the series being retconned as being set in its own continuity from its second season onward, with no narrative ties to Supergirl, rendering it a stand-alone spin-off.

## Series overview

Overview of Supergirl seasons :
| Season | Episodes | Episodes | Originally released | Originally released | Originally released | Rank | Average viewership (in millions) |
| Season | Episodes | Episodes | First released | Last released | Network | Rank | Average viewership (in millions) |
| 1 | 20 | 20 | October 26, 2015 (2015-10-26) | April 18, 2016 (2016-04-18) | CBS | 39 | 9.81 |
| 2 | 22 | 22 | October 10, 2016 (2016-10-10) | May 22, 2017 (2017-05-22) | The CW | 129 | 3.12 |
| 3 | 23 | 23 | October 9, 2017 (2017-10-09) | June 18, 2018 (2018-06-18) | The CW | 154 | 2.82 |
| 4 | 22 | 22 | October 14, 2018 (2018-10-14) | May 19, 2019 (2019-05-19) | The CW | 169 | 1.67 |
| 5 | 19 | 19 | October 6, 2019 (2019-10-06) | May 17, 2020 (2020-05-17) | The CW | 118 | 1.58 |
| 6 | 20 | 20 | March 30, 2021 (2021-03-30) | November 9, 2021 (2021-11-09) | The CW | 140 | 1.17 |
Kara Zor-El was sent to Earth from Krypton as a 13-year-old by her parents, Zor-El and Alura. Kara was tasked with protecting her infant cousin, Kal-El, but her spacecraft was knocked off course and trapped in the Phantom Zone for 24 years. By the time her spacecraft crash-landed on Earth, Kal-El had already grown up and become Superman. The series begins 12 years later, with Kara embracing her superhuman powers and adopting the superhero alias "Supergirl".
Season 1
In Season 1, Kara reveals her powers to become National City's protector. She discovers that numerous criminals her mother imprisoned have escaped to Earth, including her aunt Astra and her uncle Non. Kara works with her adoptive sister Alex Danvers, the Green Martian J'onn J'onzz, James Olsen, and tech genius Winn Schott to fight these threats.
Season 2
In Season 2, Kara and her allies face tensions between humans and extraterrestrials while investigating Project Cadmus, run by Lillian Luthor, Lex Luthor's mother. Kara befriends Lena Luthor, Lillian's adoptive daughter, and navigates her romantic feelings for Mon-El, a prince from Daxam, Krypton's neighboring planet. Meanwhile, James becomes the vigilante Guardian, Alex begins dating Maggie Sawyer, and J'onn forms a bond with M'gann M'orzz, a White Martian.
Season 3
In Season 3, Kara grapples with Mon-El's departure, only for him to return from the 31st century, where he has founded the Legion and married Imra Ardeen. J'onn reunites with his father, M'yrnn J'onzz, and Kara's new friend, Samantha Arias, unknowingly transforms into the world-killing weapon Reign.
Season 4
In Season 4, Kara confronts rising anti-alien sentiments fueled by Lex Luthor, who manipulates Ben Lockwood into forming a human-first group, the Children of Liberty, forcing her to fight against prejudice and for the civil and political rights of aliens. Meanwhile, a Kara clone, dubbed Red Daughter, is trained by Kasnian forces to fight Supergirl at Lex's request. Tensions arise as Col. Lauren Haley joins the DEO, demanding that Supergirl reveal her identity, which she refuses to do.
Season 5
In Season 5, Kara and her friends face a new threat, Leviathan, while adjusting to life on the newly created Earth-Prime following the multiverse-altering Crisis on Infinite Earths. Kara also faces challenges working under Lex Luthor, as Leviathan continues their covert operations.
Season 6
In Season 6, the final season, Lex seeks to continue the Anti-Monitor's work by conquering the multiverse and imprisons Kara in the Phantom Zone, where she discovers her father is also trapped. After being rescued, Kara and her team face the fifth-dimensional imp Nyxlygsptlnz, who escaped the Phantom Zone and seeks revenge on her father. Lex eventually allies with Nyxlygsptlnz, leading to the final showdown in the series.

## Cast and characters

* Melissa Benoist as Kara Zor-El / Kara Danvers / Supergirl: A Kryptonian living in National City, who must embrace her powers after previously hiding them. She assists her adoptive sister Alex as part of the Department of Extra-Normal Operations (DEO) as she discovered the truth that her adoptive father also worked for the DEO so they would not take her, while Alex's co-workers at the DEO help her perfect her powers. Kara worked as Cat Grant's assistant at CatCo. Benoist expressed her excitement over portraying the character, and being able to "[tell] a story about a human being really realizing their potential and their strength". At the end of season one, Kara was promoted by Cat and became a junior reporter at the beginning of season two. Malina Weissman (seasons 1-2) and Izabela Vidovic (seasons 3-4 & 6) portray a young Kara.
* Mehcad Brooks as James "Jimmy" Olsen / Guardian (seasons 1–5; guest: season 6): A former Daily Planet photographer, James moved to National City and became the new art director for his former colleague, Cat Grant, at CatCo Worldwide Media. He is initially a potential love interest for Kara. Among his reasons for moving across the country are his breakup with his fiancée, Lucy Lane, and keeping an eye on the newly revealed Supergirl for Superman. While working at the Daily Planet, James received the Pulitzer Prize for taking the first photograph of Superman. In the second season, James becomes Guardian. He also becomes the acting CEO of CatCo after Cat Grant leaves the company. In the fourth episode of season 5, James goes back to his hometown and uncovers a great deal of corruption going on at a new prison. By the episode's end, James decides to leave National City to run his hometown newspaper. He returns in the series finale to assist the Superfriends in the final battle against Lex and Nyxly and attend Alex and Kelly's wedding.
* Chyler Leigh as Alexandra "Alex" Danvers / Sentinel: Kara's human adoptive sister. She is a physician, bioengineer, scientist and government agent who serves as Hank Henshaw's right hand at the DEO. Having been extensively trained in combat by Henshaw, Alex in turn provides rigorous training to Kara to decrease her over-reliance on her powers. She and Kara grow suspicious of the DEO upon learning that their missing father was forced to work there to protect Kara, but Alex ultimately learns that Henshaw is really the Martian survivor J'onn J'onzz in disguise, whom her late father had rescued before his and the real Henshaw's apparent deaths. In season two, Alex learns that her father is alive and searches for him. She also meets and befriends police detective Maggie Sawyer and begins to develop feelings for her, forcing Alex to confront her sexuality. Jordan Mazarati and Olivia Nikkanen portray a young Alex. At the end of season three, Alex becomes the new director of the DEO.
* Jeremy Jordan as Winslow "Winn" Schott Jr. / Toyman (seasons 1–3; guest: seasons 5–6): A tech expert who worked alongside Kara at CatCo, he is Kara's best friend and serves as one of her allies, helping her develop her costume and aiding her in her adventures. Winn has unrequited feelings for Kara and is a rival with James for her affection. However, at the end of "For the Girl Who Has Everything", Winn has accepted that it is best that they remain as best friends and in "Solitude", he begins seeing Cat Grant's new assistant, who is also Kara's rival; Siobhan Smythe, who is subsequently fired by Cat and who, in "Worlds Finest", becomes a supernatural metahuman supervillain called Silver Banshee. In the series, he is the son of Toyman. Cat nicknames him Toyman Junior after she finds out. In season two, Winn left CatCo to work at the DEO as a desk agent. He also works with James Olsen as his vigilante partner. At the end of season 3, he left for the future with Mon-El and joined the Legion of Superheroes. He returns in a two-part special episode in season 5, helping the Superfriends take down his evil doppelganger, and later in the series finale to assist them in the final battle against Lex and Nyxly and attend Alex and Kelly's wedding.
* David Harewood as J'onn J'onzz / Martian Manhunter: The head of the DEO who takes Hank Henshaw's likeness after Henshaw is killed in Peru while hunting J'onn. J'onn takes Henshaw's likeness to reform the DEO from within as well as to watch over Alex and Kara. The evolution of Henshaw was discussed during the filming of the pilot, with the executive producers jokingly saying that Harewood would be a good actor to play the Martian Manhunter in a potential television series, to which DC Comics' Geoff Johns asked why it could not be done in Supergirl. Harewood reflected that he had difficulty "find[ing] an angle to play Hank Henshaw" in the pilot, and became excited when he was told about the change to his character's backstory. Harewood also recurred in the series as the real Hank Henshaw, who became Cyborg Superman.
* Calista Flockhart as Catherine J. "Cat" Grant (season 1; guest: seasons 2–3 & 6): The outwardly shallow and superficial, but inwardly sweet, founder of the media conglomerate CatCo Worldwide Media, who feels, since she "branded" Kara as "Supergirl", that she has proprietary custody over the new hero. Before she founded CatCo, she was a gossip columnist at the Daily Planet, and before that, the personal assistant to the Daily Planet's Editor-in-Chief, Perry White. Cat investigates and reveals that Supergirl is Superman's cousin, which then causes Kara to become a target for some of Superman's rogues gallery. Cat also serves as a mentor to Kara, dispensing advice about being a woman in a man's world. In the episode "Hostile Takeover", she suspects that Kara is Supergirl. In the second episode of season two, Cat announces that she is taking a leave of absence from CatCo, leaving James to run the company in her stead, although she returns at the end of the season to aid the heroes during the conflict with Queen Rhea. In season three, she became the White House Press Secretary for President Olivia Marsdin. In the series finale, Cat buys back CatCo and hires Kara as her new editor-in-chief, while also disclosing to Kara herself that she has always known of Kara's Supergirl identity. Shortly after, Cat gives an interview where Kara publicly reveals herself as Supergirl.
* Chris Wood as Mon-El / Mike Matthews (seasons 2–3; guest: seasons 5–6): A prince from the planet Daxam with similar powers to Superman and Supergirl, Mon-El lands on Earth in the pod at the end of season one.
* Floriana Lima as Margarita "Maggie" Sawyer (season 2; recurring: season 3): A detective for the National City Police Department who takes a special interest in the cases involving aliens and metahumans. The first openly gay character introduced, Maggie dates Alex Danvers, even becoming engaged. However, this is broken off. Lima became a recurring actress for the third season, departing in the season's fifth episode. Lima noted the role was only intended to last for one season.
* Katie McGrath as Lena Kieran Luthor (seasons 3–6; recurring: season 2): The CEO of L-Corp (formerly known as Luthor Corp) and the younger paternal half-sister of Lex Luthor. She arrives in National City after Lex has been incarcerated, hoping to rebrand Luthor Corp as a force for good. As the daughter of Lionel Luthor, to whom she is close, Lena tries to redeem her family name after Lex's crimes have tarnished it and to break from her half-brother and step-mother's legacy. Initially, she believed that she was the adopted daughter of Lionel and Lillian Luthor, but Lena learns that she is actually Lionel's illegitimate child from his extramarital affair. Lena meets Kara after Kara is assigned to interview Lena about L-Corp. Shortly after, the two develop a very close relationship. Camille Marty portrays a young Lena.
* Odette Annable as Samantha "Sam" Arias / Reign (season 3; guest: season 5): Another Kryptonian sent to Earth as an infant and single mother to her daughter Ruby. Samantha's villainous alternate personality, Reign, emerges in the middle of season 3, but she is unaware of it and her alter ego's actions.
* Jesse Rath as Querl "Brainy" Dox / Brainiac 5 (seasons 4–6; recurring: season 3): A half-A.I., half-organic 12th-level intellect from the planet Colu and a member of the Legion of Super-Heroes in the 31st century.
* Sam Witwer as Benjamin Lockwood / Agent Liberty (season 4; guest: season 5): The brilliant, ruthless, and terrifying founder and figurehead of Children of Liberty, a human-supremacist hate group that supports a human-first world order.
* Nicole Maines as Nia Nal / Dreamer (seasons 4–6): A soulful young transgender woman with a fierce drive to protect others and the newest addition to the CatCo reporting team. The character is the first transgender superhero on television.
* April Parker Jones as Colonel Lauren Haley (season 4): A hardline career military woman who lives and dies by the orders of her commanding officers. Dedicated to her country, she always acts in its best interest — even if it's not her own.
* Azie Tesfai as Kelly Olsen (seasons 5–6; recurring: season 4): James's younger, no-nonsense sister, recently returned to the United States following a military tour overseas.
* Andrea Brooks as Eve Teschmacher (season 5; recurring: seasons 2–4; guest: season 6): A former CatCo assistant who became part of Lena's research team at L-Corp before being revealed as a dastardly turncoat spy working for Lex Luthor. She is also revealed to be an unwilling spy working for Leviathan, which has been manipulating Lex Luthor.
* Julie Gonzalo as Andrea Rojas / Acrata (seasons 5–6): A CEO of Obsidian Tech who is the new editor-in-chief of Catco Worldwide Media and an old friend of Lena Luthor.
* Staz Nair as William Dey (seasons 5–6): A new star reporter at Catco Worldwide Media who is secretly remains under the London Times newspapers' employ and undercover to investigates Andrea Rojas, suspecting that she is a criminal.
* LaMonica Garrett as Mar Novu / Monitor (season 5; guest: season 4): A multiversal being testing different Earths in the multiverse in preparation for an impending "crisis", providing the Book of Destiny to John Deegan, releasing J'onn J'onzz's brother, and retrieving the corpse of Lex Luthor. He made his first appearance in the Arrowverse crossover "Elseworlds".
** Garrett also portrays Mobius / Anti-Monitor, the Monitor's polar opposite, an evil being dedicated to ending the multiverse.
* Peta Sergeant as Nyxlygsptlnz "Nyxly" (season 6): A 5th Dimension Imp princess who Kara meets in the Phantom Zone, who desires revenge on her father for banishing her and killing her brother, and is willing to do whatever is necessary to get it.

## Production
### Development

In September 2014, Warner Bros. Television Studios began development on a television series centered around Supergirl. The series was executive produced by Greg Berlanti, Ali Adler, and Sarah Schechter from Berlanti Productions, with DC Comics' Geoff Johns also attached to the project. Early titles considered for the series included Super and Girl. Berlanti confirmed the project shortly thereafter, citing inspiration from the actress Ginger Rogers for his portrayal of the character, which resonated with executive producer Schechter.
On September 20, 2014, CBS committed to the series with a premiere planned for the 2015–16 television schedule. In January 2015, CBS Entertainment Chairman Nina Tassler revealed that the series would be a procedural drama, blending serialized story arcs with crime-solving elements. Melissa Benoist was cast as Supergirl in January 2015, following a lengthy audition process. Other actresses considered for the role included Claire Holt and Gemma Atkinson. Blake Neely, composer for Arrow and The Flash, was confirmed as the series' composer in March 2015.
The show was officially picked up to series on May 6, 2015, and the pilot premiered at San Diego Comic-Con in July 2015. Adler explained that Superman's role in the series would be minimal to maintain focus on Supergirl. In November 2015, CBS ordered seven additional episodes, bringing the total for the first season to 20 episodes.
On May 12, 2016, it was announced that the series would move to The CW for its second season, premiering in October 2016. The move to Vancouver for production raised concerns about Calista Flockhart's continued involvement, as her contract required filming near Los Angeles. Flockhart ultimately remained in a recurring role. The series was renewed for a third season in January 2017, with Jessica Queller and Robert Rovner taking over as co-showrunners.
Supergirl was renewed for a fourth season, which premiered on October 14, 2018, followed by a fifth season in October 2019. On January 7, 2020, the series was renewed for a sixth season, which premiered on March 30, 2021. On September 22, 2020, it was announced that the series would conclude after its sixth season, ending in November 2021.

### Design

The costume for Supergirl was designed by Colleen Atwood, who had previously worked on the costumes for Arrow and The Flash. Melissa Benoist, who portrayed Kara Zor-El/Supergirl, acknowledged being aware of the more modern comic depictions of the character’s outfit, noting that the frequently "micro-mini hemline" of the skirt could be "a little daunting" but also expressed that it was a challenge she welcomed. Promotional photos of Benoist wearing Atwood's design were released on March 6, 2015. Atwood aimed to "embrace the past" while also making the costume suitable for the street-style action hero of today. Atwood further revealed practical elements of the design, such as the cape being fastened to an undersuit to prevent it from pulling on the costume, and the use of Eurojersey fabric. The Martian Manhunter costume, first seen in the Season 1 episode "Human For a Day", was created through visual effects, but a physical version was later used in subsequent episodes. This costume proved to be one of the most challenging for the costume team.
The reception to the Supergirl costume was mixed. Entertainment Weekly's Natalie Abrams commented that the costume’s new look felt like a positive departure, noting the avoidance of exposing the character's midriff, as seen in the Michael Turner comic version, and Benoist's tights worn underneath the skirt with over-the-knee boots. Abrams also compared the costume's texture to that worn by Henry Cavill in Man of Steel (2013), and remarked on the shift away from the bright blue and red color scheme traditionally associated with Supergirl. Andrew Dyce of Screen Rant praised the costume for striking a perfect balance between classic nostalgia and modern design. The Washington Post similarly lauded Atwood’s ability to successfully transition "cartoon-y tints" to darker tones in her design.
However, E! Online criticized the costume, comparing it to a "cheap Halloween costume" and expressing dissatisfaction with the washed-out colors and the "gritty, 'street style'" look that Atwood intended. TV Guide echoed this sentiment, suggesting that although Benoist was posed to appear as a powerful hero, the combination of thigh-high boots and the pleated skirt made the outfit look more like a "moderately-priced Halloween costume."
For the show's fifth season, the costume was redesigned to feature pants instead of the traditional skirt.

### Filming

In February 2015, it was announced that Andrew Kreisberg, co-creator of Arrow and The Flash, had joined Supergirl as a writer and executive producer. Additionally, Arrow, The Flash, and Smallville alum Glen Winter was revealed to be directing the pilot episode. Principal photography for the pilot took place from March 4 to March 29, 2015, with filming locations including the Warner Bros. lot, which had previously been used for Lois & Clark. Each episode cost approximately $3 million to produce, one of the highest license fees ever for a first-year show.
   "When I was a child, my planet, Krypton, was dying. I was sent to Earth to protect my cousin. But my pod got knocked off-course, and by the time I got here, my cousin had already grown up to become... Superman. And so, I hid my powers, until recently when an accident forced me to reveal myself to the world. To most people, I am an assistant at CatCo Worldwide Media. But in secret, I work with my adoptive sister for the D.E.O. to protect my city from alien life and anyone else that means to cause harm. I am Supergirl!"
The second season saw a change in filming location, moving production to Vancouver, instead of Los Angeles, where the first season was shot. This move was made to reduce the high production costs, which had contributed to CBS's hesitation in renewing the series. Filming for the third season began in Vancouver on July 6, 2017, and wrapped on April 28, 2018. However, on March 12, 2020, Warner Bros. Television shut down production of the series due to the COVID-19 pandemic. The sixth and final season was initially scheduled to begin filming on September 28, 2020, and conclude by April 5, 2021, but production was temporarily postponed due to delays in receiving COVID-19 test results for the cast and crew.

## Broadcast

In Canada, Supergirl aired in a sim-subbed simulcast on Global alongside the American broadcast during the first season. For the second season, the series moved to Showcase under the same arrangement.
In the United Kingdom, Supergirl premiered on Sky One on October 29, 2015.
In Australia, Supergirl premiered on FOX8 on December 6, 2015.

## Reception
### Critical response

Critical response of Supergirl :
| Season | Rotten Tomatoes | Metacritic |
| 1 | 92% (72 reviews) | 75% (38 reviews) |
| 2 | 92% (20 reviews) | 81% (4 reviews) |
| 3 | 78% (15 reviews) | — |
| 4 | 87% (7 reviews) | — |
| 5 | 92% (8 reviews) | — |
| 6 | 88% (13 reviews) | — |
Review aggregation website Rotten Tomatoes gave the first season of Supergirl a 92% approval rating from critics, with an average rating of 7.53/10, based on 72 reviews. The site's consensus states: "Melissa Benoist shines as Superman's plucky little cousin in Supergirl, a family-friendly comic-book adaptation that ditches cynicism for heart." Metacritic, which uses a weighted average, reported "generally favorable reviews" with an assigned score of 75 out of 100, based on reviews from 38 critics. Cliff Wheatley of IGN gave the pilot episode a 7/10, praising Benoist's performance as Kara and the fun take on the Superman mythos.
Rotten Tomatoes gave the second season a 92% approval rating from critics with an average rating of 7.88/10, based on 20 reviews. The site's consensus reads: "The arrival of the more famous cousin in Supergirl does nothing to detract from the show's lead, who continues to deliver strength, action, and relatability." Metacritic reported "universal acclaim" with an assigned score of 81 out of 100, based on reviews from 4 critics.
The third season holds a 78% approval rating on Rotten Tomatoes based on 15 reviews, with an average rating of 6.9/10. The critical consensus states: "Heavier themes lead to higher stakes, but Supergirl gives its eponymous heroine and her fellow supers plenty of room for growth, creating a well-balanced, engaging third season."
The fourth season reports an 87% approval rating, with an average rating of 7.27/10 based on 7 reviews. The website's critic consensus reads: "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." The book Adapting Superman: Essays on the Transmedia Man of Steel includes a chapter titled "Forging Kryptonite: Lex Luthor's Xenophobia as Societal Fracturing, from Batman v Superman to Supergirl," which analyzes Lex Luthor's actions in Season 4 as "a representation exploring the cultural effects of encroaching xenophobia" from society to the family, reflecting the years following the 2016 United States presidential election.
Review aggregation website Rotten Tomatoes gave the fifth season of Supergirl an 92% approval rating from critics, with an average rating of 7.0/10, based on 8 reviews. The site's consensus states: "While Supergirl’s fifth season suffers from too many plot threads, it still delivers the heart, action, and timely storytelling fans expect from the series."
For the sixth and final season, Rotten Tomatoes reported an 88% approval rating, with an average rating of 6.8/10, based on 6 reviews. The consensus reads: "In its final stretch, Supergirl struggles to juggle its many characters and subplots, but it still manages to close the story with an emotional and satisfying conclusion, led by Benoist's strong performance."

### Ratings

Viewership and ratings per season of Supergirl :
| Season | Timeslot (ET) | Network | Episodes | First aired | First aired | Last aired | Last aired | TV season | Viewership rank | Avg. viewers (millions) | 18–49 rank | Avg. 18–49 rating |
| Season | Timeslot (ET) | Network | Episodes | Date | Viewers (millions) | Date | Viewers (millions) | TV season | Viewership rank | Avg. viewers (millions) | 18–49 rank | Avg. 18–49 rating |
| 1 | Monday 8:00 pm | CBS | 20 | October 26, 2015 (2015-10-26) | 12.96 | April 18, 2016 (2016-04-18) | 6.11 | 2015–16 | 39 | 9.81 | 27 | 2.4 |
| 2 | Monday 8:00 pm | The CW | 22 | October 10, 2016 (2016-10-10) | 3.06 | May 22, 2017 (2017-05-22) | 2.12 | 2016–17 | 129 | 3.12 | 115 | 1.0 |
| 3 | Monday 8:00 pm | The CW | 23 | October 9, 2017 (2017-10-09) | 1.87 | June 18, 2018 (2018-06-18) | 1.78 | 2017–18 | 154 | 2.82 | 120 | 0.9 |
| 4 | Sunday 8:00 pm | The CW | 22 | October 14, 2018 (2018-10-14) | 1.52 | May 19, 2019 (2019-05-19) | 1.07 | 2018–19 | 169 | 1.67 | 147 | 0.5 |
| 5 | Sunday 9:00 pm | The CW | 19 | October 6, 2019 (2019-10-06) | 1.26 | May 17, 2020 (2020-05-17) | 0.65 | 2019–20 | 118 | 1.58 | 113 | 0.5 |
| 6 | Tuesday 9:00 pm | The CW | 20 | March 30, 2021 (2021-03-30) | 0.73 | November 9, 2021 (2021-11-09) | 0.49 | 2020–21 | 140 | 1.17 | 133 | 0.3 |

### Accolades

Awards and nominations received by Supergirl :
| Year | Award | Category | Nominee(s) | Result |
| 2015 | Critics' Choice Television Awards | Most Exciting New Series | Supergirl | Won |
| 2016 | People's Choice Awards | Favorite New TV Drama | Supergirl | Won |
| 2016 | Saturn Awards | Best Actress on Television | Melissa Benoist | Nominated |
| 2016 | Saturn Awards | Best Guest Starring Role on Television | Laura Benanti | Nominated |
| 2016 | Saturn Awards | Best Superhero Adaptation Television Series | Supergirl | Nominated |
| 2016 | Saturn Awards | Best Supporting Actress on Television | Calista Flockhart | Nominated |
| 2016 | Saturn Awards | Breakthrough Performance | Melissa Benoist | Won |
| 2016 | Teen Choice Awards | Breakout Series | Supergirl | Nominated |
| 2017 | GLAAD Media Awards | Outstanding Drama Series | Supergirl | Nominated |
| 2017 | Kids' Choice Awards | Favorite TV Show – Family Show | Supergirl | Nominated |
| 2017 | Saturn Awards | Best Actress on a Television Series | Melissa Benoist | Won |
| 2017 | Saturn Awards | Best Guest Performance on a Television Series | Tyler Hoechlin | Nominated |
| 2017 | Saturn Awards | Best Superhero Adaptation Television Series | Supergirl | Won |
| 2017 | Saturn Awards | Best Supporting Actor on a Television Series | Mehcad Brooks | Nominated |
| 2017 | Teen Choice Awards | Choice Action TV Actor | Chris Wood | Nominated |
| 2017 | Teen Choice Awards | Choice Action TV Actress | Melissa Benoist | Won |
| 2017 | Teen Choice Awards | Choice Action TV Show | Supergirl | Nominated |
| 2017 | Teen Choice Awards | Choice Liplock | Melissa Benoist and Chris Wood | Nominated |
| 2017 | Teen Choice Awards | Choice TV Ship | Melissa Benoist and Chris Wood | Nominated |
| 2017 | Teen Choice Awards | Choice TV Villain | Teri Hatcher | Nominated |
| 2018 | People's Choice Awards | The Sci-Fi/Fantasy Show of 2018 | Supergirl | Nominated |
| 2018 | Saturn Awards | Best Actress on a Television Series | Melissa Benoist | Nominated |
| 2018 | Saturn Awards | Best Superhero Adaptation Television Series | Supergirl | Nominated |
| 2018 | Saturn Awards | Best Supporting Actress on Television | Odette Annable | Nominated |
| 2018 | Teen Choice Awards | Choice Action TV Actor | Chris Wood | Nominated |
| 2018 | Teen Choice Awards | Choice Action TV Actress | Melissa Benoist | Won |
| 2018 | Teen Choice Awards | Choice Action TV Show | Supergirl | Nominated |
| 2018 | Teen Choice Awards | Choice Scene Stealer | Katie McGrath | Nominated |
| 2018 | Teen Choice Awards | Choice TV Villain | Odette Annable | Nominated |
| 2019 | GLAAD Media Awards | Outstanding Drama Series | Supergirl | Nominated |
| 2019 | Saturn Awards | Best Superhero Television Series | Supergirl | Won |
| 2019 | Saturn Awards | Best Actress on Television | Melissa Benoist | Nominated |
| 2019 | Saturn Awards | Best Supporting Actor on Television | David Harewood | Nominated |
| 2019 | Saturn Awards | Best Guest Starring Role on Television | Jon Cryer | Nominated |
| 2019 | Teen Choice Awards | Choice Action TV Actress | Melissa Benoist | Nominated |
| 2019 | Teen Choice Awards | Choice Action TV Show | Supergirl | Nominated |
| 2019 | Teen Choice Awards | Choice TV Villain | Jon Cryer | Nominated |
| 2020 | GLAAD Media Awards | Outstanding Drama Series | Supergirl | Nominated |
| 2020 | People's Choice Awards | The Sci-Fi/Fantasy Show of 2020 | Supergirl | Nominated |
| 2021 | Critics' Choice Super Awards | Best Actor in a Superhero Series | Jon Cryer | Nominated |
| 2021 | Critics' Choice Super Awards | Best Actress in a Superhero Series | Melissa Benoist | Nominated |
| 2021 | GLAAD Media Awards | Outstanding Drama Series | Supergirl | Nominated |
| 2021 | Saturn Awards | Best Superhero Adaptation Television Series | Supergirl | Nominated |
| 2021 | Saturn Awards | Best Actress on Television | Melissa Benoist | Nominated |
| 2021 | Saturn Awards | Best Guest Performance on a Television Series | Jon Cryer | Won |
| 2022 | GLAAD Media Awards | Outstanding Drama Series | Supergirl | Nominated |
| 2022 | Saturn Awards | Best Network or Cable Science Fiction Television Series | Supergirl | Nominated |

#### Critics' top ten lists

2015 critics' top ten lists
* No. 10 People
* Unranked – Variety
* No. 7 The Washington Post
2016 critics' top ten lists
* No. 5 Cinema Blend

## Arrowverse

In November 2014, Berlanti expressed interest in Supergirl existing in the Arrowverse, the same universe as his other series Arrow and The Flash, and in January 2015, The CW president Mark Pedowitz revealed that he was also open to a crossover between the series and networks (due to Berlanti executive producing all three and The CW being co-owned by CBS). However, CBS Entertainment chair Nina Tassler stated that month that "those two shows are on a different network. So I think we'll keep Supergirl to ourselves for a while." In August 2015, Tassler revealed that while there were no plans at the time to do crossover storylines, the three series would have crossover promotions.
Pedowitz regretted passing on the series when presented it in mid-2014, saying, "We hadn't launched The Flash yet, we weren't ready to take on another DC property. In hindsight we probably should've gone that direction...Sometimes you lose great shows." In January 2016, during the Television Critics Association press tour, he said that The CW was still interested in a crossover with Supergirl if the producers could find a way to do it, and Berlanti added that while no official conversations had taken place, internal ones had concerning how a crossover would work. He also noted that for a crossover to happen during Supergirl's first season, it would have to be figured out "in the next month or so". Glenn Geller, Tassler's successor at CBS, then stated on the matter, "I have to be really careful what I say here. Watch and wait and see what happens."
On February 3, 2016, it was announced that Grant Gustin, who appears as Barry Allen / Flash on The Flash, would appear in the eighteenth episode of the first season, "Worlds Finest". While no plot details on the episodes were released at the time, Ross A. Lincoln of Deadline Hollywood noted that "the in-universe reason" for the crossover was due to Barry's ability to travel to various dimensions, thus implying that Supergirl exists on an alternate Earth to Arrow and The Flash in a multiverse. The Flash episode "Welcome to Earth-2" confirmed this, showing an image of Benoist as Supergirl during a sequence where characters travel through that multiverse. The earth that the series inhabits is Earth-38 in the Arrowverse multiverse, and has been informally referred to as "Earth-CBS" by Marc Guggenheim, one of the creators of Arrow.
During the second season, Supergirl appears in "Invasion!", a crossover episode of The Flash, Arrow and Legends of Tomorrow, when she's recruited by Barry Allen and Cisco Ramon at the end of "Medusa" to help fight off an invasion by the Dominators. Supergirl and The Flash also featured in a musical crossover, featuring several covers of existing songs along with two original numbers. Similar to "Invasion!", the crossover begins at the end of the Supergirl episode "Star-Crossed" and primarily takes place during The Flash episode "Duet", featuring the Music Meister as the antagonist who puts both The Flash and Supergirl in a shared hallucination. After "Invasion!", Guggenheim felt "If there's an appetite for it from the fans and from the network," the crossover next year could be "a proper four-part crossover."
At the 2017 Paleyfest event, Kreisberg reiterated the creative team's intention to do a full four-way crossover the following year. At San Diego Comic Con in 2017, it was confirmed that another four-way crossover would take place, with Supergirl playing a larger role than the previous season. The four-way crossover event, titled "Crisis on Earth-X", took place on November 27 and 28, 2017, across Supergirl and Arrow (on the first night) and The Flash and Legends of Tomorrow (on the second night).
In May 2018, Arrow star Stephen Amell announced at The CW upfronts that the next Arrowverse crossover would feature Batwoman and Gotham City. The crossover, titled "Elseworlds", aired in December 2018, ahead of a potential 2019 solo series for the character. Supergirl was confirmed to have a participating episode in August, which closed out the three-part crossover, trading nights with The Flash just for the event. Therefore, the show's participating episode aired on Tuesday, December 11. The end of "Elseworlds" teased the next crossover event, "Crisis on Infinite Earths". Supergirl's episode opened the five-part crossover on December 8, 2019, with the final two installments airing on January 14, 2020. At the end of the event, the new Earth-Prime was formed, which saw Earth-38 merged with the former Earth-1 and Black Lightning's earth, creating a fictional universe where all of the CW series exist together.

### Standalone spin-off

In October 2019, The CW and Warner Bros. Television announced development on a spin-off series titled Superman & Lois, with Tyler Hoechlin and Elizabeth Tulloch reprising their roles as Clark Kent/Superman and Lois Lane. In January 2020, Superman & Lois was ordered to series. The series premiered on February 23, 2021. Originally presented as being set in the same continuity as Supergirl, the series was retroactively established to be set in an adjacent universe to the Arrowverse in its second season finale.

## Other media
### Comic books

In July 2015, a four-page preview comic entitled Sister Act, written by Ali Adler, Greg Berlanti and Andrew Kreisberg was released digitally online, and then a day later in the September 2015 issue of TV Guide.
Adventures of Supergirl: Beginning in January 2016, DC Comics launched a 13-issue bi-weekly digital comic (6 in print). Written by Sterling Gates and drawn by a rotating team of artist including Bengal, Jonboy Meyers, Emanuela Lupacchino, and Emma Vieceli, the comic, while not directly tying into the show, tells stories set in the universe of the show. The digital series was collected in print as a six-issue series published twice a month from May to July 2016, and as a complete graphic novel in September of that year.
They are also involved in the Earth-Prime miniseries launched in April 2022.
* Adventures of Supergirl (2016-09-21): Includes Adventures of Supergirl #1-6.

### Novels

In November 2017, Abrams Books began publishing a new trilogy of Supergirl novels, written by Jo Whittemore, aimed at middle-grade readers in tandem with a similar trilogy of The Flash novels. The first, Supergirl: Age of Atlantis, was released on November 7, 2017, and features Supergirl dealing with a surge of new powered people in National City, as well as a mysterious humanoid sea creature captured by the DEO who is seemingly attracted by the new superpowered people. A sequel, Supergirl: Curse of the Ancients, was released on May 1, 2018, with a third novel, titled Supergirl: Master of Illusion, released on January 8, 2019.

### Guidebook

A guidebook for the series, published by Abrams, was released on March 12, 2019. Supergirl: The Secret Files of Kara Danvers: The Ultimate Guide to the Hit TV Show features "detailed profiles on characters and super powers, a heroes and villains gallery, episode guide, and more" from the first three seasons of the series.

### Video games

The video game Lego DC Super-Villains features DLC inspired by Supergirl in the "DC Super Heroes: TV Series DLC Character Pack". The DLC pack includes Supergirl as a playable character.

## Home media

Home media releases for Supergirl :
| Complete season | DVD release dates | DVD release dates | DVD release dates | Blu-ray release dates | Blu-ray release dates |
| Complete season | Region 1 | Region 2 | Region 4 | Region A | Region B |
| 1 | August 9, 2016 | July 25, 2016 | July 27, 2016 | August 9, 2016 | July 25, 2016 |
| 2 | August 22, 2017 | August 21, 2017 | August 23, 2017 | August 22, 2017 | August 21, 2017 |
| 3 | September 18, 2018 | September 17, 2018 | September 19, 2018 | September 18, 2018 | September 17, 2018 |
| 4 | September 17, 2019 | September 23, 2019 | | September 23, 2019 | September 23, 2019 |
| 5 | September 8, 2020 | | September 8, 2020 | | |