How did Caitlin feel about Killer Frost being unleashed?
That was a key question on The Flash Season 3 Episode 7 when she used her powers to save Barry, forcing her alter ego to be released.
Killer Frost then went on a rampage looking for Dr. Alchemy and leaving a trail of destruction wherever she went.
Also, Joe and H.R had a heart-to-heart about everything that has happened to them.
Use the video above to watch The Flash online to get caught up with the latest drama for the characters.
Paul Dailly is a staff writer for TV Fanatic. Follow him on Twitter.