The Flash Photos from "I Know Who You Are"

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Joe West is going to have a lot of explaining to do on The Flash Season 3 Episode 20 "I Know Who You Are."

As we see in the photos below, Caitlin, now in full Killer Frost mode, has taken his girlfriend Cecile as her prisoner!

We're guessing it's going to take more than flowers and candy for Joe to talk his way out of this one. Will he have to reveal everything to the district attorney?

In addition to Joe's woes, the photos also give us our first look at Tracy Brand. She could be Barry's last hope to stop Savitar.

Scroll through the photos and share your thoughts with us. Will Team Flash stop Killer Frost? Or will Cecile pay the ultimate price?

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1. The Temperature's Dropping - The Flash Season 3 Episode 20

We've seen Killer Frost fight Team Flash in the past. But there was always enough of Caitlin in her to prevent any real damage to her friends. Has that changed?

2. Hunting Time - The Flash Season 3 Episode 20

Caitlin Snow is nowhere to be found now that Killer Frost's in full control. With a new costume and an alliance with the villain, Killer Frost sets out to make sure Team Flash loses.

3. Cecile's in Trouble! - The Flash Season 3 Episode 20

Killer Frost means business! And to prove it, Caitlin's villainous alter ego has taken Joe's girlfriend Cecile as her prisoner! Will Team Flash be able to negotiate her release?

4. Team Flash Faceoff - The Flash Season 3 Episode 20

Team Flash has faced a lot of villains over the years. But how will they handle a villain who happens to be one of their best friends? And how will Joe explain this to Cecile?

5. Is More Trouble Arriving? - The Flash Season 3 Episode 20

Barry and Joe look scared. But with Killer Frost in front of them, who's putting the fear in their eyes? Has Savitar arrived on the scene to help his new accomplice?

6. Another Day, Another Bad Situation - The Flash Season 3 Episode 20

Barry's racing against time to find a way to save Iris. But he also needs to find a way to bring Caitlin back. Oh, and he must figure out Savitar's identity. A speedster's work is never done.

7. Surveying the Scene - The Flash Season 3 Episode 20

We're used to Barry rushing to save the day. But he always does a better job when he's got Team Flash watching his back. Will he be able to outsmart someone who knows all of his tricks?

8. Ready to Vibe - The Flash Season 3 Episode 20

Poor Cisco's caught in a tough situation. He knows he needs to do the right thing and save all the innocent people. But he also wants to save Caitlin. Can he do both?

9. Meet Tracy Brand - The Flash Season 3 Episode 20

Thanks to Future Barry, present day Barry has tracked down the scientist who can help the team end Savitar before he kills Iris. But first, they'll have to convince her.

10. Skeptical Scientist - The Flash Season 3 Episode 20

We're curious how Barry and his friends will present Tracy with their problem. It wouldn't be the first time Barry revealed his secret identity. But maybe they'll speak in theoretical terms to be safe.

11. Please Help - The Flash Season 3 Episode 20

Barry will do anything to save Iris. Including plead with a stranger, who he knows holds the key to trapping Savitar in the Speed Force. But will they be able to do it before the future becomes reality?

12. Package Deal - The Flash Season 3 Episode 20

Barry and Cisco have had their ups and downs ever since the Flashpoint debacle. But after Barry's trip to the future, he understands better than ever how much he needs his friends. And how much they need him.

13. Better Safe than Sorry - The Flash Season 3 Episode 20

We know H.R. loves his props. But what's with the fire extinguisher? Maybe he's learned his lesson being at STAR Labs. It's probably not a bad idea to have one within easy reach at all times.

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The Flash Season 3 Episode 20: "I Know Who You Are"
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The Flash Season 3 Episode 20 Quotes

Tracy: What are you doing?
Cisco: You mean save you from a burning, fiery death?

Julian: Sorry, why are we not looking for Caitlin again?
H.R.: Easy, Romeo and Juliet. None of us have forgotten about Caitlin.