About The Flash (2014) Season 3, Episode 7 : Killer Frost

Flash discovers that he's powerless against Savitar's superior speed, but other matters take precedence when Caitlin turns into Killer Frost and goes on a rampage trying to find Alchemy. Guest Stars: Greg Grunberg, Lisa MacFadden, Blair Penner, Taylor St. Pierre, Tobin Bell, Andre Tricoteux,