Meanwhile, Killer Frost was fully into making Tracy an ex-physicist/ex-human, and Cisco was having major issues doing anything Vibe-ish to take her down (though he came through in the end during their big “battle”).
After all, we had to first meet The Flash’s newest brainiac, physicist Tracy Brand, as played by House vet Anne Dudek.
This is when Killer Frost played a verbal version of The Mirror Game with Barry, teasing how extremely knowledgable Savitar is about details of the present.
Both H.R. and Killer Frost took a shine to Tracy, though for completely different reasons.