Details
Kara gains a new ally when the lightning-fast superhero The Flash suddenly appears from an alternate universe and helps Kara battle Siobhan, aka Silver Banshee, and Livewire in exchange for her help in finding a way to return him home.
- Drama, Sci-Fi & Fantasy, Action & Adventure
- English
Cast & Crew
- Melissa Benoist , Chyler Leigh , David Harewood , Jeremy Jordan , Calista Flockhart , Mehcad Brooks
- Greg Berlanti, Ali Adler, Andrew Kreisberg
- Michael Grassi, Michael Cedar, Ali Adler, Andrew Kreisberg, Sarah Schechter, Greg Berlanti