Supergirl: Solitude

"Solitude" is the fifteenth episode of season one of the superhero action series Supergirl. It was directed by Dermott Downs with a script written by Anna Musky-Goldwyn and James DeWille based on a story treatment by Rachel Shukert. It first aired on CBS on Monday, February 29th, 2016 at 8:00 pm. In this episode, Kara and James take a trip to Superman's old home-away-from-home, the Fortress of Solitude. Meanwhile, a Kryptonian computer artificial intelligence called Indigo begins wreaking havoc in National City. When Supergirl can't find a way to defeat her, their only hope in salvation lies with... Winn Schott!