No amount of Earth-2 selfies will keep Barry and Cisco from running headlong into trouble when The Flash drives through the breaches.

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Team Flash is looking for Jesse Quick (Violett Beane), but Harry (Tom Cavanagh), Barry (Grant Gustin), and Cisco (Carlos Valdes) will find themselves facing off with Killer Frost (Danielle Panabaker) and Deathstorm (Robbie Amell) in

"Welcome to Earth-2." While we'd love to find out how Ronnie Raymond and Caitlyn Snow came into their alter ego's, the real question we need answered is why they have it out for our STAR Labs heroes.

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By time the first half of the two-part adventure comes to an end, their motives should become much clearer.

"We've talked extensively about Earth-Two's Killer Frost," Panabaker told TV Line, explaining why. "I think that after the episode, after you see her relationships with people like Zoom, you'll begin to understand her a bit more."

All we know for sure is that Frost and Deathstorm will become formidable foes.

"She poses a very serious [threat]! She's not happy to see them, so she sort of goes on a hunt," Panabacker teased. "She uses her powers to try to attack them."

Meet Killer Frost when The Flash airs Tuesdays at 8 p.m. ET on The CW.

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The Flash, Television, The cw