- Grant Gustin (Barry Allen / The Flash)
- Candice Patton (Iris West-Allen)
- Danielle Panabaker (Khione)
- Danielle Nicolet (Cecile Horton)
- Kayla Compton (Allegra Garcia)
- Brandon McKnight (Chester P. Runk)
- Jon Cor (Mark Blaine / Chillblaine)
The Flash — S0E45
Episode: Synchronicity in a Flash
Air Date: 2017-05-23
Runtime: 20 min
Overview
Blake Neely works with the live orchestra to lay down the right sound for Duet. Season 3 featurette.