While "Supergirl" and "The Flash" are dealing with a musical dream world, Team Flash and Team Supergirl will be occupied with keeping them both alive and stopping the Music Meister, who is on the loose in Central City. A new clip from "Duet," the musical crossover between the two DCTV shows, shows Kid Flash, Vibe and Martian Manhunter gearing up to face off against the musical madman himself.
The clip opens in STAR Labs, where Kid Flash blames himself for Flash's comatose state; according to him, it's his fault that Barry was whammied by Music Meister. Though Kid Flash is willing to take the blame, Vibe steps up to help, and Martian Manhunter wants in as well. However, Team Flash is unaware that J'onn is a Martian, and thus underestimate his ability to help. When he transforms in front of their eyes, however, they're more willing to bring him along.
Shortly thereafter, Cisco vibes them to Music Meister's location. Music Meister is gleeful when he sees the three heroes, and he's especially glad to meet Kid Flash. They have a brief exchange before Wally speeds towards him -- and, surprisingly, Music Meister has the speed to match. It's unclear at this time if Music Meister is a speedster himself, or whether his super speed is another mind trick.
“The Flash” and “Supergirl” musical crossover began with a lead-in scene on “Supergirl” and will continue in full on “The Flash.” The episode will include musical numbers from “The Flash” stars Grant Gustin, Jesse L. Martin and Carlos Valdes; “Supergirl” stars Melissa Benoist and Jeremy Jordan; and “Legends of Tomorrow” co-star Victor Garber and “Arrow” regular John Barrowman; along with “Glee” alum Darren Criss as the Music Meister, the episode’s antagonist.
According to the official episode synopsis for "Duet,"
DARREN CRISS (“GLEE”) GUEST STARS AS THE MUSIC MEISTER IN THE FLASH AND SUPERGIRL MUSICAL CROSSOVER – Barry (Grant Gustin) and team are surprised when Mon-El (guest star Chris Wood) and Hank Henshaw (guest star David Harewood) arrive on their Earth carrying a comatose Supergirl (guest star Melissa Benoist) who was whammied by the Music Meister (guest star Darren Criss). 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, one that Team Flash can’t cure. 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, complete with singing and dancing, to the end. Dermott Downs directed the episode with story by Greg Berlanti & Andrew Kreisberg and teleplay by Aaron Helbing & Todd Helbing. Original airdate 3/21/2017.
Starring Grant Gustin as the Scarlet Speedster, “The Flash” airs Tuesdays at 8 pm ET/PT on The CW. The series also stars Jesse L. Martin, Tom Cavanagh, Carlos Valdes, Candice Patton, Danielle Panabaker, Keiynan Lonsdale and more.