Supergirl Series Finale Overview
The last episode of Supergirl, titled "Kara," aired as the series finale on November 9, 2021, on The CW. The episode concluded the sixth and final season of the superhero drama, which was based on the DC Comics character created by Otto Binder and Al Plastino. The finale was written by Robert Rovner and Jessica Queller and directed by Jesse Warn, marking the end of a six-season run that began on October 26, 2015. The CW, owned by Nexstar Media Group, announced the cancellation of Supergirl in September 2021, along with several other Arrowverse series, as part of a broader restructuring of its scripted programming slate.
The finale episode ran for approximately 43 minutes and drew a total viewership of 0.49 million viewers in the United States according to Nielsen estimates, with a 0.1 rating in the adults 18-49 demographic. The episode served as the 126th and final episode of the series overall. Warner Bros. Television produced the show in association with Berlanti Productions and DC Entertainment. The series finale resolved multiple storylines, including Kara Danvers' decision to step back from her role as Supergirl and embrace a life outside of heroics, while other characters such as Alex Danvers, Lena Luthor, and William Dey received closure on their respective arcs.
Final Season Production and Broadcast Details
Season 6 of Supergirl was ordered in January 2021 and consisted of 20 episodes, which were split into two production blocks. Filming for the final season took place primarily in Vancouver, British Columbia, with principal photography concluding in mid-2021. The season premiered on March 30, 2021, and the series finale aired on November 9, 2021, on The CW. The season was produced by Warner Bros. Television and Berlanti Productions, with Greg Berlanti, Sarah Schechter, Robert Rovner, and Jessica Queller serving as executive producers.
The final season saw a shift in tone and format compared to earlier seasons, with the show operating as a standalone entry rather than a full Arrowverse crossover event. The series finale integrated elements from the broader DC Television Universe while focusing primarily on the core characters. Behind-the-scenes reports confirmed that the creative team planned the ending to provide a definitive conclusion to Kara's story while leaving room for future DC projects. The CW's decision to end the series was part of a strategy to reduce its scripted output and focus on other programming categories.
Viewership, Ratings, and Legacy
Supergirl's final season averaged approximately 0.5 million viewers per episode in live-plus-same-day ratings, a decline from the series' peak viewership in earlier seasons. The show's ratings placed it in the lower tier of The CW's scripted lineup during its final run. Despite the ratings trajectory, the series maintained a consistent fanbase and received positive critical reception for its portrayal of a female-led superhero narrative. The series finale ranked among the most-watched episodes of the final season, reflecting strong engagement from the core viewership during the conclusion of the story.
The legacy of Supergirl continues through its streaming availability on platforms such as HBO Max and The CW's digital services. The show's final season and complete series remain accessible for on-demand viewing, contributing to its ongoing visibility in the DC television catalog. The series has been cited as a milestone for female representation in superhero television, with its finale providing a structured endpoint for the character's television arc. Future DC projects, including films and series under the DC Studios banner led by James Gunn and Peter Safran, may reference or build upon elements introduced during Supergirl's run.