Kara and her sister Alex continue their training in new photos from "Hostile Takeover," an upcoming episode of "Supergirl." Additionally, Kara's Kryptonian aunt Astra (Laura Benanti) shows her softer side with a mysterious man.

"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.