The Flash's "The Sound and The Fury" saw the introduction of another Flash villain, Pied Piper/Hartley Rathaway (Andy Mientus). Rathaway's arrival also afforded us another glimpse at the dark side of what Flash executive producer Andrew Kreisberg calls "the devil" in Team Flash's midst, Dr. Harrison Wells.

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To Reveal Reverse-Flash or Not to Reveal

“ Even though we know we're the ones who made him evil, we sometimes sit there and go, 'God, why? Just please be Harrison Wells! Please don't be this nightmarish demon.'

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myself included - who have continued to imagine and believe that there must be more to Wells' connection to Reverse-Flash, and indeed Kreisberg did disclose that Eddie Thawne's connection to Reverse-Flash will pay off later on this season beginning with a big hint in episode 15 when we spoke to him at the TCA (Television Critics Association) press tour earlier this month.As far as the idea that Wells may be doing it all for the greater good, though, it looks like we can count that out - maybe...probably (I refuse to believe it!)."With Arrow, I think we learned not to jerk the audience around too much," Kreisberg reflected in thinking about the decision to come clean on Wells sooner rather than later. "I think sometimes people withhold secrets at their peril. We felt like, if we hadn't revealed it, then it wouldn't be a satisfying conclusion to those first nine episodes. The only debate we had amongst ourselves was, how long will the audience accept knowing that he's the villain and having the rest of our characters not know? That's something we've been dealing with in the back half of the season. Are people going to feel like [Team Flash] is dumb for not realizing this?""I think part of what's keeping this next stream of episodes going is how good at hiding his villainy Wells is and how strong Tom's performance is," Kreiserg continued. "And having an episode like "The Sound and the Fury" where he really is being incredibly selfless, and yet part of you knows it's all a show; it's all fake -- but just how effective it really is. Even more so than that, how much you want it not to be true. I think that's the biggest thing we've discovered as writers. When you watch those episodes, you watch Tom in those scenes, and you see how kind he is, and supportive. Even though we know we're the ones who made him evil, we sometimes sit there and go, 'God, why? Just please be Harrison Wells! Please don't be this nightmarish demon.' But hopefully we've plotted it so that not being sure of what he was and then knowing he's Reverse-Flash but still not knowing what his full agenda is, people will continue to invest in it without feeling like they're too far ahead of the characters."The Flash producers want to put even more emphasis on creating a sense of family, so that when the S.T.A.R. Labs team does wise-up, it'll be that much more painful."I think at this point in the storyline, obviously, the audience wasn't quite sure where Wells stood," Kreisberg explained. "I think now they have more information about who he is and what he's up to. Now that the audience knows that, watching the camaraderie amongst everybody, it's almost more heartbreaking now. We

just love that dynamic. There's something about the fun, especially at the beginning of this episode, with the Keystone Cops, and Wells comes in and he's being this hero, but we all know he's the Reverse-Flash. How do you square that circle? That's one of the things that keeps changing over the course of the season, as secrets start to come out. How do you reconcile the Harrison Wells that we see in this episode, who's a friend and selfless and kind, with this demon-like monster? I think that's why Tom loves playing the part; it's why we love writing the part."

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Continue on for more on time travel, speed force, more Reverse-Flash secrets, the investigation into Wells and the night Barry's mother died, Pied Piper's promise to Cisco and more...