|The Last Daughter of Krypton|
|Season 5, Episode 18|
|The House of El||Seeing Double|
THE TRUE HEIR- Kara Danvers battles Reign and Darkseid for the future of Earth and the souls of humanity. Lena Luthor visits Clark Kent and James Olsen in Metropolis. Alex Danvers helps Karen Starr recuperate.
- Melissa Benoist as Kara Danvers/Supergirl
- Chyler Leigh as Alex Danvers
- Katie McGrath as Lena Luthor
- Odette Annable as Reign/Darkseid
- Tyler Hoechlin as Clark Kent/Superman
- with Claire Holt as Karen Starr/Power Girl
- and Mehcad Brooks as James Olsen
Special Appearance ByEdit
- Calista Flockhart as Cat Grant
Special Guest StarsEdit
- Helen Slater as Eliza Danvers
- Jeremy Jordan as Winn Schott (video)
- David Harewood as J'onn J'onzz
- Floriana Lima as Maggie Danvers (dream)
- Laura Benanti as Astra In-Ze & Alura Zor-El (in Rao's Light)
- Jenna Dewan as Lucy Lane
- Elizabeth Tulloch as Lois Lane
- Olivia Wilde as Susannah Russo
- with Zachary Quinto as Dru-Zod (in Rao's Light)
- and Jason Momoa as Lobo
- Brenda Strong as Lillian Luthor
- Julian Sands as Jor-El (in Rao's Light)
- Marie Averopoulos as Diana, Princess of Themyscira/Wonder Woman
- Tamzin Merchant as Lyra Strayd
- Daniel Sharman as Lor-Zod
- Robert Gant as Zor-El (in Rao's Light)
- Briana Venskus as Agent Susan Vasquez
- and Dianna Agron as Major Raya Zod-El (in Rao's Light)
- Antagonists: Reign, Darkseid
- Title Meaning: By this episode, both Kara and Reign have been referred to by the titular epithet. The two characters also fight to establish who is the true holder of the title
- This episode was the second candidate for the series finale.
- Kara, Alex, James, Winn, J'onn, Cat, Alura, Astra, Eliza, Zor-El, Jor-El, and Vasquez are the only characters to appear in the first and last episodes of the series.
- 9th episode this season to feature all main characters.
- This is the series finale.
- Kara, Alex, Lena, and Reign are the only characters to appear in every episode this season.
- This episode takes place on December 25, 2020, Christmas Day.
- Kara is the only character to appear in all of the first 100 episodes.
- Alex appeared in 94 episodes
- James appeared in 70 episodes
- Lena appeared in 69 episodes
- Maggie appeared in 63 episodes
- J'onn appeared in 61 episodes
- Karen appeared in 58 episodes
- Reign appeared in 55 episodes
- Clark and Lucy appeared in 54 episodes each
- Winn appeared in 46 episodes
- Astra appeared in 44 episodes
- Alura appeared in 42 episodes
- Zod appeared in 37 episodes
- Samantha appeared in 35 episodes
- Cat appeared in 31 episodes
- Winslow appeared in 28 episodes
- Mon-El appeared in 22 episodes
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