'Supergirl' Ending & Why Kara Makes That Fatal Decision, Explained

The DCU returns with Supergirl, bringing Milly Alcock’s version of Kara Zor-El after her debut in 2025’s Superman. This take, adapted from Tom King’s Woman of Tomorrow, presents a different Kara—edgy, violent and often drunk—who helps Ruthye after Krem of the Yellow Hills murders her parents.

The film explores the pull between vengeance and justice, with Ruthye refusing to kill Krem and Kara delivering the final blow to stop him from causing more harm. Kara then returns to Metropolis, meets Superman and says she will stay a while. Earlier, Ruthye has the chance to kill Krem, but Kara intervenes not to spare him so much as to keep Ruthye from becoming like him.

Letting a child commit an irreversible act of violence would consume her; Kara urges Ruthye to lay down her sword so she can live with her pain rather than be defined by it. Kara, older and reconciled with her past, accepts the burden and makes the darker, deliberate choice to kill Krem herself, acting like a soldier to prevent further harm.

supergirl, kara zor-el, milly alcock, dcu, superman, tom king, ruthye, krem, yellow hills, metropolis