The CW released a new featurette for the episode. Watch below. Kevin Smith is also directing an episode for Supergirl this year.
KILLER FROST EMERGES — Caitlin (Danielle Panabaker) uses her powers to save Barry (Grant Gustin) but as her mother predicted, the effort unleashes her inner Killer Frost. Killer Frost goes on a rampage looking for Dr. Alchemy, kidnapping Julian (Tom Felton) and battling both The Flash and Vibe (Carlos Valdes). Meanwhile, Joe (Jesse L. Martin) and H.R. (Tom Cavanagh) have a heart to heart talk. Kevin Smith directed the episode with story by Judalina Neira and teleplay by Andrew Kreisberg & Brooke Roberts (#307). Original airdate 11/22/2016.
"The Flash" airs Tuesdays at 8pm ET on The CW starring Grant Gustin as Barry Allen/The Flash, Candice Patton as Iris West, Panabaker as Caitlin Snow, Carlos Valdes as Cisco Ramon, Keiynan Lonsdale as Wally West, Tom Cavanagh as Dr. Harrison Wells and Jesse L. Martin plays Joe West.