Watch the First Teaser for The Flash/Supergirl Crossover Episode

The first teaser promo for The Flash/Supergirl crossover episode has been released. Grant Gustin is set to appear in the March 25 episode of Supergirl, entitled, “World’s Finest”.

In the episode, “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.”

I can’t wait for this episode!

Source: CBS