In "Solitude," an upcoming episode of "Supergirl," Kara and Jimmy head to Superman's Fortress of Solitude in order to learn more about their latest foe: Laura Vandervoort's Indigo. Several new photos from the episode feature Kara's somber exploration of Superman's little piece of Krypton.

"Smallville's" Vandervoort Will Test Supergirl's Mettle as "Badass" Indigo

"Solitude" -- Kara travels to Superman's Fortress of Solitude in hopes of learning how to defeat Indigo (Laura Vandervoort), a dangerous being who can transport via the Internet and who has a connection to Kara's past. Also, James's relationship with Lucy reaches a crossroads, on SUPERGIRL, Monday, Feb. 29 (8:00-9:00 PM, ET/PT) on the CBS Television Network.

"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.