The Flash (2014)/Duet

Duet
Season 3, Episode 17
Airdate	March 21, 2017
Production Number	T27.13117
Teleplay by	Aaron Helbing & Todd Helbing
Story by	Greg Berlanti & Andrew Kreisberg
Directed by	Dermott Daniel Downs
Stream
← 3x16 Into the Speed Force	3x18 → Abra Kadabra (episode)
The Flash — Season Three

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Duet is the seventeenth episode of the third season of The Flash, and the sixty-third episode overall. Resolves Star-Crossed on Supergirl.

Starring: Grant Gustin (Barry Allen / The Flash), Candice Patton (Iris West, Millie Foss), Danielle Panabaker (Dr. Caitlin Snow), Carlos Valdes (Cisco Ramon / Vibe, Pablo), Keiynan Lonsdale (Wally West / Kid Flash)

with Tom Cavanagh (Harrison "H.R." Wells (Earth-19))

and Jesse L. Martin (Detective Joe West, Digsy Foss)

Special Guest Star: Melissa Benoist (Kara Danvers / Supergirl), Victor Garber (Digsy Foss's Husband), John Barrowman (Cutter Moran), David Harewood (J'onn J'onzz / The Martian Manhunter), Jeremy Jordan (Grady), Chris Wood (Mon-El, Tommy Moran)

Guest Starring: Darren Criss (Music Meister), Michelle Harrison (Nora Allen)

Co-Starring: Braden Chase (Goon #1), Liam Hughes (Young Barry), Gili Roskies (Patron)