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Watch 4 Cool Clips Ahead of Tonight’s Supergirl/Flash Crossover

The Flash arrives in Supergirl's world

The day is finally here! The long-awaited Supergirl/Flash crossover event will air tonight at 8pm EST on CBS.

Barry Allen aka The Flash (Grant Gustin) will find himself hurled into the world of Kara Danvers aka Supergirl (Melissa Benoist). She will enlist him to help her defeat Livewire and Silver Banshee in exchange for helping him return home. But not before they engage in a footrace to see who really is the fastest superhero.

In preparation for tonight’s event, check out the four clips below.