Kara is set to gain a new ally as The Flash is set to appear in a crossover episode entitled Worlds Finest.
Check out the new promo image of the coming episode:
Supergirl / The Flash crossover episode “Worlds Finest” is slated for to air Monday, March 28 at 8/7c on CBS!
“So who do you think is faster? The Flash? Or Supergirl? Place your bets in the comment section or get at us on Twitter!”