User:Brojam/Duet

"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 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.

Casting
Main cast members Grant Gustin, Candice Patton, Danielle Panabaker, Carlos Valdes, Keiynan Lonsdale, Tom Cavanagh, and Jesse L. Martin star as Barry Allen / Flash, Iris West, Caitlin Snow, Cisco Ramon / Vibe, Wally West / Kid Flash, H.R. Wells, and Joe West, respectively. In January 2017, Darren Criss was cast as Music Meister. Additionally, the episode's guest cast includes Melissa Benoist as Kara Danvers / Supergirl, Jeremy Jordan as Winn Schott, David Harewood as J'onn J'onzz / Martian Manhunter, Chris Wood as Mon-El, Victor Garber as Martin Stein, and John Barrowman as Malcolm Merlyn.

Filming
Filming of the episode occurred from February 1 until February 15, 2017, and was directed by series vet Dermott Daniel Downs.

Music
The music featured will mostly be covers, with the hope of writing one original song for both episodes.

Broadcast
After beginning in the ending scene of the March 20, 2017 episode of Supergirl, the episode of The Flash aired on March 21 on the CW.