Grant Gustin shares his enthusiasm for Superman appearing in this year's DC TV crossover.
The wedding of The Flash starts "Crisis on Earth-X" tonight.
The Flash's Candice Patton talks about the upcoming "WestAllen" wedding that will be happening in the upcoming DC TV crossover.
The wedding of Barry and Iris will be part of this year's DC TV crossover.
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