Check Out The First Promo For Upcoming Crossover Starring SUPERGIRL And THE FLASH
Two iconic heroes come face to face in the first promo for the upcoming crossover between Supergirl and The Flash, but what exactly does it reveal about what's to come in the episode? Check it out...
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.
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