'Flash' Grant Gustin Reveals First Supergirl Crossover Photo
The Flash’s warm “Welcome to Earth-2” gave us a first tease of the upcoming Supergirl crossover, seemingly confirming CBS’ Kara belongs to another universe, but let’s get those crazy kids together already! Grant Gustin to the rescue, releasing the first photo of Barry and Kara hanging out for CBS’ upcoming Supergirl crossover.