Supergirl (season 4)

The fourth season of the American television series Supergirl, which is based on the DC Comics character Kara Zor-El / Supergirl, premiered on The CW on October 14, 2018. The season follows Kara, a reporter and superpowered alien who fights against those who threaten Earth, and the fallout of her use of mysticism and time traveling. It is set in the Arrowverse, sharing continuity with the other television series of the universe. The season is produced by Berlanti Productions, Warner Bros. Television, and DC Entertainment, with Robert Rovner and Jessica Queller serving as showrunners.

The season was ordered in April 2018. Production began that July and concluded in April 2019. Melissa Benoist stars as Kara, with principal cast members Mehcad Brooks, Chyler Leigh, David Harewood, and Katie McGrath also returning from previous seasons, while Jesse Rath was promoted to the principal cast from his recurring status in season three. They are joined by new cast members Sam Witwer, Nicole Maines, and April Parker Jones. The series was renewed for a fifth season on January 31, 2019.

Main

 * Melissa Benoist as Kara Danvers / Kara Zor-El / Supergirl and Red Daughter
 * Mehcad Brooks as James Olsen / Guardian
 * Chyler Leigh as Alex Danvers
 * Katie McGrath as Lena Luthor
 * Jesse Rath as Querl "Brainy" Dox / Brainiac 5
 * Sam Witwer as Ben Lockwood / Agent Liberty
 * Nicole Maines as Nia Nal / Dreamer
 * April Parker Jones as Lauren Haley
 * David Harewood as J'onn J'onzz / Martian Manhunter

Recurring

 * Rhona Mitra as Mercy Graves
 * Robert Baker as Otis Graves
 * Anthony Konechny as Raymond Jensen / Parasite
 * Bruce Boxleitner as Phillip Baker
 * Andrea Brooks as Eve Teschmacher
 * Sarah Smyth as Lydia Lockwood
 * Graham Verchere as George Lockwood
 * David Ajala as Manchester Black
 * Donna Benedicto as DEO agent
 * Jessica Meraz as Pamela Ferrer / Menagerie
 * Azie Tesfai as Kelly Olsen
 * Jon Cryer as Lex Luthor

Guest
• Lynda Carter as Olivia Marsdin

• Brenda Strong as Lillian Luthor

• Tiya Sircar as Fiona Byrne

• Vincent Gale as Dr. Rohan Vose

• Cardi Wong as Kesse Kay

• Fulvio Cecere as Massimo

• Xander Berkeley as Peter Lockwood

• Abby Ross as Alien student

• Justice Leak as Hellgrammite

• Adam Levy as Amadei Derros

• Michelle Krusiec as Natalie Hawkings

• Shannon Chan-Kent as Elizabeth Hawkings

• Kwesi Ameyaw as Cassian

• Helen Slater as Eliza Danvers

• Steve Byers as Tom

• Michael Johnston as Adam

• Roxy Wood as Yvette

• John Wesley Shipp as Barry Allen / Flash of Earth-90

• LaMonica Garrett as Mar Novu / The Monitor

• Stephen Amell as Oliver Queen / Green Arrow

• David Ramsey as John Diggle

• Carlos Valdes as Cisco Ramon / Vibe

• Danielle Panabaker as Caitlin Snow / Killer Frost

• Tyler Hoechlin as Kal-El / Clark Kent / Superman and John Deegan / Superman

• Grant Gustin as Barry Allen / Flash

• Jeremy Davies as John Deegan

• Ruby Rose as Kate Kane / Batwoman

• Cassandra Jean Amell as Nora Fries

• Adam Tsekhman as Gary Green

• Bob Frazer as Roger Hayden / Psycho-Pirate

• Elizabeth Tulloch as Lois Lane

• Russell Wong as General Alfonso Tan

• Hannah James as Maeve Nal

• Kate Burton as Isabel Nal

• Brennan Mejia as Jerry

• Lukas Gage as Kevin Huggins

• Garwin Sanford as Paul Nal

• Brian Cyburt as Spencer

• Françoise Robertson as Sarah Walker

• Louis Ozawa Changchien as Hat

• Michael Adamthwaite as Cooper

• Jonathan Bennett as Quentin

• William MacDonald as Dr. Kaplan

• Gabriel Gurevich as Mikhail

• Carl Lumbly as M'yrnn J'onzz

• Jill Morrison as Bitsie Teschmacher

• Karin Konoval as Senator Granberry

• Parveen Dosanjh as Dr. Park

• Willie Garson as Steve Lomeli

• Emily Tennant as Edna

• Patti Allan as Margot Morrison

• Phil LaMarr voices Malefic J'onzz

Development
At the Television Critics Association press tour in January 2018, The CW president Mark Pedowitz said he was "optimistic" and "confident" about Supergirl and the other Arrowverse shows returning next season, but added that it was too soon to announce anything just yet. On April 2, The CW renewed the series for its fourth season. Robert Rovner and Jessica Queller returned to serve as the season's showrunners without their former co-showrunner Andrew Kreisberg, who was fired during the previous season.

Writing
Following the conclusion of the third season, which closed with a second Kara Danvers born from the aura that escaped during the final battle with Reign being found by Russian soldiers in Siberia, Robert Rovner and Jessica Queller confirmed that the fourth season would be inspired by the Superman: Red Son comic book mini-series. Queller described the adaptation as "an homage" to the series, which portrays what would have happened if Superman had landed in Russia and became a hero there instead of in America. The story intended to examine the nature-versus-nurture debate, and developed as a "slow-burn" throughout the season.

At San Diego Comic-Con 2018, Rovner and Queller stated that the season would aim to be more "grounded" than previous seasons in order to touch on topical real-world issues. They confirmed that the fourth season would look to refocus on Kara's professional career as a reporter and see her act as a mentor to Cat Grant's former protégé, both at CatCo and as a superhero, paralleling Kara's own journey of coming into her own. The duo added that "This is the season where Kara becomes as much a hero as Supergirl." Teasing the main villain of the season, the producers described Agent Liberty as the leader of "a hate group that supports a human-first world order" and under the guise of a family man, provokes "anti-alien sentiment in the country, echoing the hateful rhetoric we're seeing right now in certain American politics."

Rovner and Queller also announced that the theme of the season would be "What is stronger: hope or fear?" Melissa Benoist commented that, "I think their main premise is that fear itself is a villain, and can hope conquer it? Supergirl stands for hope, so we'll see." Queller concurred, adding that the season would investigate, "How can [Supergirl] be a beacon of hope when she represents what people are afraid of?"

Casting
Main cast members Melissa Benoist, Mehcad Brooks, Chyler Leigh, David Harewood, and Katie McGrath return from previous seasons as Kara Danvers / Kara Zor-El / Supergirl, James Olsen / Guardian, Alex Danvers, J'onn J'onzz / Martian Manhunter, and Lena Luthor, respectively. Benoist also portrays Red Daughter, the clone of Kara. The fourth season is the first not to feature original cast member Jeremy Jordan, who plays Winn Schott. While it was initially announced that he would shift into a recurring capacity for the fourth season, Rovner later said he would not appear until the fifth season. Chris Wood and Odette Annable, who became regulars in the second and third seasons, respectively, too did not reprise their roles as Mon-El and Samantha Arias / Reign, respectively, as regulars in the fourth season. On June 15, 2018, it was announced that Jesse Rath was promoted to a series regular after previously recurring in the third season as Querl "Brainy" Dox / Brainiac 5. On July 17, it was reported that Sam Witwer had joined the main cast as Agent Liberty. On July 21 at San Diego Comic-Con, it was announced that Nicole Maines and April Parker Jones had been cast as series regulars and would portray Nia Nal / Dreamer and Colonel Lauren Haley, respectively, with the former to become the first transgender superhero on television.

Brent Spiner was originally cast as Vice President Baker in August, but the role was recast later that month with Bruce Boxleitner due to Spiner having "family issues conflicting with the show's production dates." In October, it was announced that the character Lex Luthor, Lena's half-brother and the archnemesis of Kara's cousin Superman, would be introduced this season. The following month, Jon Cryer, who portrayed Lex's nephew Lenny Luthor in the film Superman IV: The Quest for Peace, was cast in the role.

Filming
Production for the season began on July 11, 2018, in Vancouver, British Columbia, and concluded in April 2019. Melissa Benoist joined filming following the conclusion of her run on Broadway as the star of Beautiful: The Carole King Musical on August 4, 2018.

Arrowverse tie-ins
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 "Elseworlds" is slated to launch a 2019 solo series for the character.

Marketing
The main cast of the season as well as executive producers Robert Rovner, Jessica Queller, and Sarah Schechter attended San Diego Comic-Con on July 21, 2018 to promote the season.

Broadcast
In May 2018, it was announced that Supergirl, which had aired on Mondays since its debut, would move to Sundays for its fourth season due to the wrong date due  programming expansion to Sunday nights. The season premiered on The CW in the United States on October 14, 2018. The annual crossover episode will swap time-slots with The Flash for that week and will air on Tuesday, December 11.

Home media
The season was released on DVD and Blu-ray on September 17, 2019 with special features including the show's 2018 Comic-Con panel, deleted scenes and a gag reel. The Blue-ray release also included all three episodes of the fifth annual Arrowverse crossover event titled "Elseworlds".

Critical response
The review aggregation website Rotten Tomatoes reports a 87% approval rating for the fourth season, with an average rating of 7.26/10 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."

Reviewing for Den of Geek, Delia Harrington gave the premiere a rating of 4/5, writing: "The Supergirl season 4 opener sows the seeds of a season's worth of conflict while being a great episode in its own right." IGN's Jesse Schedeen said of the premiere that, "After a disappointing finish to a generally underwhelming Season 3, it's good to see Supergirl quickly bouncing back this week. 'American Alien' sets the stage for a promising conflict to come, introducing memorable new villains and supporting characters and forcing Kara to confront the things she can't control in her city. Supergirl is borrowing several pages from the X-Men playbook, and that's by no means a bad thing." He gave the episode a rating of 8.6/10, concluding that, "Supergirl's fourth season is off to a promising start thanks to an eventful and dramatic premiere episode." Overall, he gave 9/10 points to the whole season, stating that "Supergirl's fourth season is undoubtedly the strongest to date, thanks in large part to the concerted effort to make up for the lack of compelling, nuanced villains in year's past. The finale episode ties all those threads together in a satisfying way, wrapping up the shared saga of Red Daughter, Agent Liberty and Lex Luthor while also setting up Lena Luthor to become Kara's greatest and most personal enemy yet." Caroline Siede of The A.V. Club concurred with Schedeen's X-Men comparison, reflecting that over the seasons, "[Supergirl] has grown both more explicit and more nuanced in its handling of social and political issues." Siede gave the premiere a "B+" grade, explaining, "I'm tempering my optimism with just a little bit of caution. [...] Supergirl still has plenty of room to grow, but it's nice to see the show get its core ethos so right."

Accolades
! scope="row" rowspan="5" | 2019
 * rowspan="2" | Leo Awards
 * Best Sound in a Dramatic Series
 * data-sort-value="Petty, Kyle" | Kyle Petty ("Man of Steel")
 * Nominated
 * Best Visual Effects in a Dramatic Series
 * data-sort-value="Babityan, Gevork" | Gevork Babityan, Kris Cabrera, Armen V. Kevorkian, Mike Leeming, Brian Reiss ("Call to Action")
 * Nominated
 * rowspan="3" | Teen Choice Awards
 * Choice TV Show: Action
 * Supergirl
 * Nominated
 * Choice TV Actress: Action
 * Melissa Benoist
 * Nominated
 * Choice TV Villain
 * Jon Cryer
 * Nominated
 * }
 * Melissa Benoist
 * Nominated
 * Choice TV Villain
 * Jon Cryer
 * Nominated
 * }
 * Nominated
 * }
 * }