“Having received an ominous threat from her old boss, Amunet (guest star Katee Sackhoff), Caitlin (Danielle Panabaker) fears that her past time as Killer Frost may be back to haunt her.
Though the episode won’t air until next week The CW has released the first batch of promo photos for The Flash episode 4.05!
New additions to the cast are Katee Sackhoff as the villain Amunet Black and Hartley Sawyer as Ralph Dibny, aka Elongated Man.