When a mysterious ice powered enemy frames Frost for a brutal crime, she must find a way to clear her name; Barry and Iris have a surprise houseguest, and Joe continues to deal with Kristen Kramer.
Quest roles:
Michelle Harrison(Joan Williams), Carmen Moore(Kristen Kramer), Jon Cor(Mark Blaine / Chillblaine), Malaika Jackson(Dr. Rene Carpenter), Stephanie Izsak(Officer Daisy Korber)