'Flash' and 'Supergirl' Musical 'Duet' Gets Full Synopsis

Now that we’ve crossed over into March, Flash and Supergirl are warming up for the big two-night musical crossover starting on March 20. Synopses for both episodes have arrived, the first of which includes Teri Hatcher’s arrival, but Music Meister’s machinations are … somewhat disappointing.

Our first synopsis for March 20 Supergirl episode “Star-Crossed” doesn’t clarify the identity of Hatcher and Kevin Sorbo’s villains, though it does curiously note Darren Criss’ Music Meister attacking Kara on Earth-38 first, to say nothing of where the musical villain originally hails from:

TERI HATCHER (“DESPERATE HOUSEWIVES,” “LOIS & CLARK: THE NEW ADVENTURES OF SUPERMAN”) AND KEVIN SORBO (“HERCULES”) GUEST STAR; DARREN CRISS (“GLEE”) MAKES HIS DEBUT AS THE MUSIC MEISTER
A new villain (guest star Teri Hatcher) comes to National City, putting Supergirl (Melissa Benoist) on high alert. Meanwhile, Winn’s (Jeremy Jordan) girlfriend, Lyra (guest star Tamzin Merchant), gets Winn in trouble with the law. Maggie (guest star Floriana Lima) attempts to help Winn but old loyalties get in the way. The Music Meister (Darren Criss) attacks Supergirl.

The event officially gets underway in March 21 Flash episode “Duet,” though the synopsis appears to confirm that any “musical” takes place in Kara and Barry’s minds, rather than reality. That’s a stark contrast from the Music Meister’s original animated Batman: The Brave and the Bold appearance (voiced by Neil Patrick Harris), wherein the character simply hypnotized characters into his musical bidding:

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.

The two-part event will feature Glee alum Darren Criss as the Music Meister, the first look at which you can see right here. Also lending their voices will be Jesse L. Martin, Carlos Valdes and Jeremy Jordan, along with Legends of Tomorrow stars Victor Garber and John Barrowman. Supergirl cast David Harewood and Chris Wood will also appear in non-singing roles, while original songs have been provided by both Crazy Ex-Girlfriend star Rachel Bloom, and the Golden Globe-winning La La Land lyricists Benj Pasek and Justin Paul.