- 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 — S0E54
Episode: The Fastest Mind Alive: The Thinker
Air Date: 2018-08-28
Runtime: 15 min
Overview
See what makes Clifford DeVoe tick! Season 4 featurette.