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"Hope for Tomorrow" is the fifteenth episode of the sixth season of Supergirl, and the one-hundred-twenty-first and most recent episode overall. It aired on October 12, 2021.



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Guest starring





  • Nyxly makes the clever move of going after William Dey, since he keeps writing about the Superfriends in-depth. This is similar to the film Spider-Man, where Green Goblin attempts to find the photographer who takes the superhero's pictures, hoping it to be a weak link to find Spider-Man.
  • Alex and Kelly adopted Esme, who can mimic powers of aliens close to her, such as Kara and Brainy.
  • The episode's premise regarding nuclear war and Kara's neutrality when it comes to the choices of Earth is similar to the film Superman IV: The Quest For Peace in which Superman decides to no longer be a visitor on Earth and play an active role in shaping in the planet's future. This includes removing the world's stockpile of nuclear arms. Though the difference is that Kara stops them once they are fired among themselves, and Brainy and J'onn are the ones who dispose of them ultimately.
  • Lex Luthor makes his first move to Nyxly, providing her with a Lexosuit watch to go retrieve the Hope Totem from the sun.
  • Needing to pass the Hope Totem's gauntlet in order to remove it from the stone its stuck in is similar to Excalibur in the legend of King Arthur.