The good news: CW superhero TV series Supergirl and The Flash are planning a crossover episode鈥攁 dancing, musical crossover episode.
The better news: It will be packed with Broadway stars in cameo roles.
Variety reports that the episode, titled 鈥淭he Duet,鈥� will air March 21 as part of The Flash, about the ultra-fast superhero of that name.
Villain the Music Meister, who has the power 鈥渢o control people through the power of song鈥� reportedly will cause 鈥渁ll-singing, all-dancing shenanigans鈥� that will force the Flash to team up with Supergirl to defeat him. The Music Meister will be played by Hedwig and Glee star Darren Criss, according to .
The Music Meister's victims reportedly will include Jesse L. Martin (Rent), Victor Garber (Sweeney Todd), Carlos Valdes (Once), Jeremy Jordan (Newsies), and John Barrowman (Sunset Boulevard).
