Caitlin uses her powers to save Barry but as her mother predicted, the effort unleashes her inner Killer Frost. Killer Frost goes on a rampage looking for Dr. Alchemy, kidnapping Julian and battling both The Flash and Vibe. Meanwhile, Joe and H.R. have a heart to heart talk.
Quest roles:
Tobin Bell(Savitar (voice)), Andre Tricoteux(Carl Bork), Greg Grunberg(Tom Patterson), Lisa MacFadden(Anne), Blair Penner(Acolyte Craig), Taylor St. Pierre(Acolyte)