What happens when superheroes sing and dance? You get The Flash: The Musical with special guest star Melissa Benoist as Supergirl airing March 21.

The episode is titled “Duet” Here is the synopsis from TV Guide: “A crossover episode with “Supergirl” concludes. Barry and his team are surprised when Mon-El and Hank Henshaw arrive on their Earth carrying a comatose Supergirl who was whammied by the Music Meister. Unable to wake her up, they turn to Team Flash to save her. However, the Music Meister surprises The Flash and puts him in a similar coma. Kara and Barry wake up without their powers in an alternate reality where life is like a musical and the only way to escape is by following the script.”

Don’t miss The Flash “Duet” airing Tuesday, March 21 at 8/7c on The CW.

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