“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 toKara’s past. Also, James’s relationship with Lucy reaches a crossroads.”
Supergirl stars Melissa Benoist, Mehcad Brooks, David Harewood, Calista Flockheart and airs Mondays on CBS at 8 p.m.