In three new clips from "Hostile Takeover," the latest episode of "Supergirl", Kara battles her Aunt Astra (Laura Benanti) in order to save National City from destruction. One clip also reveals Astra's struggle with getting rid of Supergirl for good and that she is married to her lieutenant.

"Supergirl" airs Mondays at 8 pm EST on CBS. Developed by producers Greg Berlanti, Ali Adler and Andrew Kreisberg, the series stars Melissa Benoist, Calista Flockhart, David Harewood and Chyler Leigh.