Kara ponders a solution for her and Siobhan's rivalry, Cat Grant turns down a massive news scoop, and Indigo threatens Grant and the population of National City in three new clips from next week's "Supergirl" episode.

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

The age of chaos begins when "Smallville" alum Laura Vandervoort's villainous character debuts, first as an Internet hacktivist, and then as a super-powered villain.

"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," Melissa Benoist, Calista Flockhart, David Harewood and Chyler Leigh, airs Mondays at 8 pm EST on CBS.