Watch the teaser below:
On your marks…
– Supergirl (@supergirlcbs) March 17, 2016
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.
“The Flash” and “Supergirl” crossover, titled “Worlds Finest,” airs Monday, March 28 at 8/7c on CBS.
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