Music from the Flash and Supergirl musical crossover "Duet" is now available on iTunes.
CW video taking viewers "inside" the Flash episode "Duet" & interview with Darren Criss
Screen captures from the preview trailer for the Flash musical crossover with Supergirl, titled "Duet"
Interview clips and preview scene from the Flash episode "Duet"
Eight teases about the Flash/Supergirl musical crossover titled "Duet"
Preview images and trailer for the Flash/Supergirl musical crossover "Duet"
Official CW description for the Flash/Supergirl musical crossover episode "Duet" guest starring Darren Criss as the Music Meister