'The Flash' & 'Supergirl' Two-Part Musical Crossover Airdates & Singers

We recently reported about the CW's The Flash and Supergirl having a two-part musical crossover and the CW has announced that the two-part musical crossover will take place on Monday, March 20 (8/7c) and Tuesday, March 21 (8/7c). The crossover will start at the end of Supergirl, saving most of the musical action for The Flash‘s portion of the event, appropriately titled “Duet.”

The characters belting out the numbers will be Grant Gustin (Barry) and Melissa Benoist (Kara); Jesse L. Martin (Joe), Victor Garber (Dr. Stein), John Barrowman (Malcolm Merlyn) and Jeremy Jordan (Winn); and Carlos Valdes (Cisco).