First Official Supergirl/The Flash Crossover Teaser for “Worlds Finest”

CBS just dropped a short teaser for the Supergirl crossover episode “Worlds Finest” which will air March 28. It’s really happening!

“Worlds’ Finest” – Kara gains a new ally when the lightning-fast superhero The Flash (Grant Gustin) 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.”

The teaser follows the promotional poster released on March 9 which homages the Silver Age comic cover for Superman #199 from 1967.

via Melissa Benoist and The Flash official twitter