the Flash Season 3 Episode 7 (S03E07) - Killer Frost
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. the Flash Season Number:...