Duet (The Flash)

"**Duet**"
"Duet"
The Flash episode
	Promotional poster
Episode no.	Season 3; Episode 17
Directed by	Dermott Daniel Downs
Story by	Greg Berlanti; Andrew Kreisberg;
Teleplay by	Aaron Helbing; Todd Helbing;
Featured music	Blake Neely
Production code	T27.13117
Original air date	March 21, 2017
Guest appearances
	Melissa Benoist as Kara Danvers / Supergirl (special guest star); Victor Garber as Digsy Foss's husband (special guest star); John Barrowman as Cutter Moran (special guest star); Jeremy Jordan as Grady (special guest star); David Harewood as J'onn J'onzz / Martian Manhunter (special guest star); Chris Wood as Mon-El / Tommy Moran (special guest star); Darren Criss as Music Meister; Michelle Harrison as Nora Allen;
Episode chronology
← Previous; "Into the Speed Force"	Next →; "Abra Kadabra"
	List of episodes

"Duet" is the seventeenth episode of the third season of The CW television series The Flash, which aired on March 21, 2017. The episode was written by Aaron Helbing and Todd Helbing from a story by Greg Berlanti and Andrew Kreisberg, and was directed by Dermott Daniel Downs. The episode features a musical crossover with Supergirl and reunites Grant Gustin and Melissa Benoist with their former Glee co-star Darren Criss, who portrays the Music Meister. Jesse L. Martin also reunites with Jeremy Jordan, with whom he previously worked in the 2012 musical film Joyful Noise. The story begins at the end of the Supergirl episode "Star-Crossed", which aired on March 20, 2017, which saw Kara Danvers / Supergirl (Benoist) hypnotized into a coma by Music Meister, with Mon-El (Chris Wood) and J'onn J'onzz / Martian Manhunter (David Harewood) bringing her to Earth-1 in hope that Team Flash can save her.