- 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 — S0E20
Episode: Whose Helmet Was That?
Air Date: 2015-10-21
Runtime: 4 min
Overview
Jay Garrick, aka The Flash from Earth-2, makes his debut. Season 2 featurette.