- 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 — S5E21
Episode: The Girl With The Red Lightning
Air Date: 2019-05-07
Runtime: 42 min
Overview
Team Flash is on high alert after Cicada II threatens to unleash a dangerous virus that would put all meta-humans at risk.