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.
Stars: Grant Gustin, Candice Patton, Danielle Panabaker
Director(s): Alexandra La Roche
Writer(s): Greg Berlanti, Andrew Kreisberg, Geoff Johns