For the titular character, see Kara Danvers.
"Kara Danvers is my favorite person! She saved me more times than Supergirl ever could, so just... think about that while you're trying to get rid of her!"
Alex to Kara
"Girl of Steel" is the first episode of the third season of Supergirl, and the forty-third episode overall. It aired on October 9, 2017.


Kara deals with the loss of Mon-El by focusing all her energy on being Supergirl and the mysterious new threat against National City. Alex confesses a secret to Maggie about their impending nuptials. A citizen of National City has a mysterious connection to Kara, and Lena makes a bold move.[1]


  • This episode was the first to feature Erica Durance as Alura Zor-El. She took over the role of Laura Benanti.
  • Winn describes Kara's car chase as "very fast, very furious", a reference to The Fast and the Furious films.
  • Lena remarks to Morgan that he has "all of the charisma of a Michael Douglas movie from the '90s".
  • The episode's title is a classic title given to Supergirl. It is also a slight alteration of the title of the DCU 2013 Superman film Man of Steel.
  • The opening scene bears a strong resemblance to a scene in Superman Returns in which Superman, struggling with romantic issues, hovers high above the city in the dark, using his super-hearing to listen to various noises like sirens before snapping his eyes open and flying back down, just in time to stand in front of two officers being shot at by a rotary machine gun.
  • Reign's true form

    Reign in Samantha's nightmare.

    The figure in Samantha's nightmare at the end of the episode bears a strong resemblance to Reign's true form in the comics.


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