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There is no one by this name in the comics, and scooper Daniel Richtman speculates that it might actually be Caitlin Snow, aka Killer Frost. Though they are both villains, Frost and Clayface have ...

Barry and the team meet scientist Tracy Brand, who may be the key to stopping Savitar. Unfortunately, Killer Frost is also after Tracy, so Team Flash must battle their old friend.

Martin as Detective Joe West, Danielle Panabaker as Caitlin Snow/Killer Frost, Carlos Valdes as Cisco Ramon/Vibe, and more.

Barry takes drastic measures to stop Savitar. Meanwhile, H.R. continues to push Tracy Brand to design the trap for Savitar, and Killer Frost returns with an interesting proposal.