"My name is Barry Allen, and I am the fastest man alive." "To the outside world, I'm an ordinary forensic scientist, but secretly, with the help of my friends at S.T.A.R. Labs," "I fight crime and find other meta-humans like me." "I hunted down the man who killed my mother, but in doing so, I opened up our world to new threats, and I am the only one fast enough to stop them." "I am The Flash." "Previously on "The Flash"..." "Zoom wants you dead." "Do you think he can do everything really fast?" " How you doing, Dig?" " You're fast." "Welcome to Earth-2." "Dad!" "No!" "No!" "Caitlin." "That is your name, isn't it?" "I hate the name Caitlin." "I'm Killer Frost." "Ronnie and Caitlin's doppelgangers are evil?" "If you're coming with us, we have to go." "Cisco!" "Get ready to close the breach for good," "Zoom's coming." "No!" "He's not dead." "He's not dead." "Caitlin" "He's not dead." "He's not." " Caitlin." " This isn't happening." "This isn't happening again." "Hey, I got you." "Come on." " Open it up." " Allen..." " I need to go back." " I can't do that." " Open it up!" " Allen!" "The breaches are closed." "All the breaches are closed." "Why can't we just open one of 'em?" "The Quark Matter energy that we used to seal the breaches, it prevents them from being opened, ever again." "There's no going back to our world." "Wait." "We're trapped here for good?" "Yes." "No, we can't just let Zoom get away with this." "He just murdered Jay right in front of us." "There's got to be something we can do." "There's not." "Not this time." "It's over." "No." "How's she doing?" "Not good." "We tried to get her to go home, but she refused to leave, so, you know," "I just sat with her until she fell asleep." "First Ronnie, now Jay." "Yeah." "I'm afraid what this double dose of grief is gonna do to her." "I mean, she's pretty shell-shocked." "She'll be fine." "Snow's strong." "She'll get past this." "But in the meantime, I would not say anything to her about her counterpart from my Earth." "That goes for Joe and Iris too." "Why?" "Because you don't want to influence their reality in ways that should not be influenced." "Like in the same way as when Barry time-travels?" "Exactly, but also, what's the point?" "Those people are not your people." "Their lives are not your lives." "Never were, never will be." "Bury it." "Move on." "Yes?" "Yeah." "That I can do." "Allen?" "So that's what we did." "We didn't talk about Earth-2." "We kept what happened there between the three of us and got on with our lives knowing there was nothing we could do now to stop Zoom." "Instead, we tried to just adjust to our new circumstances and cope with our losses." "Jay's death took its toll... left scars on all of us, some more than others." "And so to try and keep my mind off thoughts of the surreal other life" "I experienced that wasn't my own," "I kept running, waiting for some other meta-human threat to rear its ugly head and distract me from the frustration I was feeling," "and as fate would have it," "I did not have to wait long." "All good." "Hey, ugly!" "It's time for dinner." "I think Bruce has gone belly up." "Power down the grid." "We're gonna have to fish him out." "So this is where Waller kept all her secret projects, huh?" "One of many sites, I'm learning." "I'm sure the new director of A.R.G.U.S. will clean up the mess that Waller left behind." "Easier said than done, honey." "My wife can do anything she puts her mind to." "Code seven in aquaria three." "I repeat, code seven in aquaria three." "There is a breach in the aquarium!" "You have an aquarium?" "Why?" "What the hell?" "Are you kidding me?" "Seven, six, five, four, three, two, one." " Yes!" " Time." "Ain't nobody faster than me." "I don't know about that." "Earth to Barry." "It's your turn, dude." "Yeah, it's time to show this little punk who the fastest stack attacker alive is." "One of you guys go ahead." "I'm gonna pass." "You're afraid of a little competition?" "No, just not in a gaming mood right now." "Okay, well, I guess that makes me champ." "Right?" "Anyway, I'm gonna go meet up with some friends." "All right." " Bye." " Bye." "Maybe next time." "And I thought you were the competitive one in the family." "I know, right?" "What's up, Bar?" "Nothing." "Just" "I don't know, I don't think Wally likes me too much." "Well, we need to fix that." "I mean, you been so busy running between alternate realities, you two haven't had a chance to spend any time together." "What you want us to do together?" "Get to know each other, find something that you guys have in common." "He's part of the family now, Bar." "You're gonna have to give it a chance." "I know." "All right, well, look, I'm gonna head to bed, all right?" " Good night." " Good night." "Something is up with him, and I don't think it's just Jay's death." "He's been acting weird ever since he came back from Earth-2." "Did he say anything to you about what happened over there?" "No, not a thing." "You?" "Hey, so..." "I been thinking." "You've been working around the clock." "Maybe you want to get some rest, go home." "You know, a good night's sleep wouldn't be the worst thing in the world." "I'm fine." "Look, I get it." "You're having a hard time with what happened." "It's a lot to take so soon after" "I said I'm fine." "Did you hear that?" "No, what?" "Caitlin just bit my head off." "She's been all business, no emotion lately." "She's been...cold." "Cold?" "Come on, Cisco." "This could be the beginning of her becoming evil." "You're not worried about that?" "I'm not worried about that." "Caitlin's not gonna become Killer Frost." "You haven't mentioned anything about about Earth-2, have you?" "No, 'cause I know how to keep a secret." "All right, well, look, I mean, it's gonna take some time for her to heal." "We just got to be there for her, keep her busy." "That shouldn't be a problem." "Oh." "Hey, Dig, Lyla." "What are you guys doing here?" "We came to give you the head's up, Barry." "About what?" "A meta-human who escaped from A.R.G.U.S. Custody, goes by the name King Shark." "King Shark?" "You mean the half-man/half-shark that tried to kill you months ago." "I thought he was dead." "That's what A.R.G.U.S. wanted you to believe when they snatched him up, but believe me, this half-shark is very much alive, and his biological imperative is telling him to do one thing." "That's kill you, Barry." "We're gonna need a bigger Flash." "So how do you know about King Shark?" "Well, as the new director of A.R.G.U.S.," "Lyla's job is to clean up Amanda Waller's messes." "King Shark was one of the bigger and weirder ones." "And it appears under her directives," "A.R.G.U.S. had been monitoring meta-human activity for the past two years." "Why?" "Well, to see if any of those powers could be exploited." "Weaponized." "How do you know that he's coming after me?" "While in our custody, he kept saying the same thing." ""Zoom wants the Flash dead"" "And although he removed the tracker we had in him, the readings we did receive show that he was headed towards Central City." "Let him come." "Barry, this thing is a killing machine." "We just came here to warn you, man." "Let A.R.G.U.S. handle it." "Nah, I can't do that, Dig." "I'm sorry, but all year, we've been sitting ducks for Zoom and his Earth-2 henchmen." "This is the last one." "I'm not gonna just wait for him to attack." "I'm going after him first." "I owe that to Jay." "Wells, he's from your earth." "What do you know about him?" "Real name, Shay Lamden, he was a-- get this--marine biologist before my particle accelerator changed him into King Shark, and Zoom put him under his control." "So how did you track him when he attacked Barry?" "Zoom sent him to this earth to kill Barry." "I just followed." "Yeah, but you did track Grodd down." "Can you find King Shark too?" "I can try." "All right." "Okay, well, all these locations are next to a body of water." "There must only be a few hours before he needs to get back into the water to re-oxygenate his blood." "I can take the Waterfront." "Can you have your team handle the rest?" " I'll get them on it." " All right." "What about Dr. Lamden's doppelganger?" "Maybe he could help us somehow." "Or not." "Looks like he died when the particle accelerator exploded." "What about next of kin?" "He's got a widow, Doctor Tanya Lamden." "She's a research scientist at Nautilus Labs," "And she studies-- wait for it--sharks." "Maybe the two of you can go and see if she's discovered anything in her research that could help us." " Okay." " Sure." "Great." " Hey, Digg." " Yeah?" "How's that helmet treating you?" "Could use some improvements." "I'll get to work on it." "Hey, Joe, what's up?" "Hey, Bar, I talked to Wally," "He wants to meet up with you." "All right." "He's working on his engineering project at our place tonight." "He would love some help from that big brain of yours." "Okay, Joe, look, I'm sorry," "Right now is kind of a crazy time." "What?" "What's going on?" "Remember that meta-human shark that Patty was after and attacked me?" "He's back?" "I thought Wells--you know." "Yeah, me too, but apparently, A.R.G.U.S. had him and he escaped, and now he's heading for Central City." "I get it." "I'll tell Wally some other time." "Hey, you know what?" "It's all good, I'll make it work." "Tell him tonight should be fine." "Are you sure?" " Yeah." " Thanks, Bar." "Yeah, bye." "Why?" "It's been two years since your particle accelerator exploded." "Seems a little late to be asking questions about my husband, doesn't it?" "Your husband passed away from cancer, correct?" "I suppose you could say that." "It only took three days for every cell in his body to grow uncontrollably." "Whatever cancer he had, it turned him into something... not human." "Well, that's why we're here, actually." "There's a meta-human in Central City whose body seems to be mutating in the same way as your late husband, but he didn't die, he became a dangerous monster." "My husband was no monster." "That's not what she was implying." "What does this have to do with me?" "We've read about the research you're doing here on sharks." "Yeah, I've had some encouraging results, although still preliminary." "We need to see it." "I beg your pardon?" "Your research, all of it." "What my colleague means to say is that if you could please let us take a look at your findings, it could help us stop this meta-human from hurting anyone." "You're with S.T.A.R. Labs." "I'm just supposed to trust you?" "Please, Mrs. Lamden." "This could help save lives." "I'll email you what I have." "Thank you." " Little harsh." " I was being direct." "Yeah, well, that's one way to describe it." "You've been acting differently toward me ever since you got back from Earth-2." "What's your problem, Cisco?" "Nothing." "Let's just go." "Grid one, negative." "Grid four, negative." "Status check, grid two." "Grid two, negative." "Anything?" "No, man, nothing yet." "Yeah, so far, nothing on our end either." "Let's just hope Wells is doing better than we are." "Hey, how's Felicity doing?" "Well, I'm not gonna lie, Barry, it was pretty rough there at first, but you know Felicity, she's tough." "Yeah, she's just not returning any of my calls." "She has a lot going on right now." "Buddy, I'll ask if she can give you a call when this is all over." "Just want to catch this thing, man, have everything to do with Zoom and Earth-2 put behind us, so we can just move on with our lives." "Starting to do that thing Oliver does, Barry, carry the weight of the world on your shoulders." "Got to stop that, man, it's gonna slow you down." "Still nothing." "Status check, grid six." "Hold on, I think we got something." "So much for cleaning up after Waller's messes." "We don't find King Shark soon, someone's gonna be cleaning up after mine." "We'll find him, Lyla." "All right, I searched the whole area." "He's gone." "Couldn't have gotten far." "Still, he knows we're here now." "We lost the element of surprise." "Not if Wells can figure out a way to track him." "In the meantime, we'll keep looking." "All right, I'll meet up with you guys later." "I got to go see Joe's son." "Okay, I thought our relationship was hard to follow." "See ya." "He's fast, John, get over it." "Never." "Joe thought I should have you take a look." "So, this is what I got so far for my project essay to get into CCU's engineering program." "Turbine supercars?" "Turbines?" "Like jet engines?" "Yeah, yeah, it'd use an engine like the ones they have in some helicopters, only it'd run on biodiesel." " Cool." " It's very cool." "Yeah, you're gonna want to address the fuel economy issue here." "It is a jet, so it's gonna burn through a lot of fuel." "Yeah, that's why I want to use biodiesel." "It'll run off of anything that burns with oxygen." "No, okay, but you also got a sound issue." "Gonna wake the neighbors... for sure." "Anything else?" "Well, I just... want to help, you know." "I'm just trying to make sure they don't have any reason to say no." "Okay." "Sorry, Wally, I didn't mean that" "It looks really good." "All right, let's start over, okay?" "Is it" "Why don't we go through it all together, work it out?" "Sounds good." "Cool." "This is a complete waste of time." "We're not gonna find anything in Doctor Lamden's research to tell us how to find King Shark." "Maybe I should take a look." "Oh, yeah, 'cause you're the doctor with a specialty in bio-chem." "I'm just saying maybe you could use another set of eyes, considering." "Considering what?" "Considering the way you've been acting lately." "What does that mean?" "You are not yourself, Caitlin," "And it's freaking me out, 'cause you have this icy look in your eye just like you did over there." "Over there?" "You mean Earth-2?" "No." "Uh, no." "Um, what I meant to say was" "You met my doppelganger, didn't you?" "What?" "No." "Cisco." "Look, I'm not supposed to say anything." "Why not?" "Because I'm not supposed to say anything." "Francisco Ramon, if you don't start talking" "Okay, fine, yes, I met your doppelganger." "She's a coldhearted Ice Queen named Killer Frost, a meta-human who enjoyed killing a lot." "There, great." "Now Harry's gonna kill me and throw myself across the room." "Cisco, I'm not a meta-human." "Okay, I hear you, but you're acting just like she did over there." "You're being shut off." "You're being detached." "You're being cold." "Because I have to be right now." "I just watched Jay get killed right in front of my eyes, just when I was starting to feel normal again, just when I was beginning to love." "So if I let myself feel, if I let all of that pain and anger out, it's never gonna stop, and that's not gonna help me either, so let's just get back to this research" "and figure out how to find King Shark." "Okay." "Here you are." "Yup, just like back home, always working." "I'm trying to locate this King Shark." "He's here?" "On this Earth?" "Yes, it turns out our friend Zoom brought him here to kill the Flash." "Looks like he's stuck here just like we are." "It looks like he is, and so I need to figure this out before more people get hurt, Jessie, so..." "Probability distribution algorithm?" "Partial matching strategies, yes." "Based on what?" "Semantic trajectories -- water, Central City, the Flash." "What about mobility behaviors?" "Jessie." "Look, you wanted me out of that room, but now that I am, you don't want me here." "Just let me help, please." "Grab a marker." "Yeah." "Hardest part was amping the torque without increasing drag." "A heavier engine would only slow things down, but this streamlined version should optimize both the torque and the horsepower." "Yeah, I'm just worried it's -- won't be enough still." "Here, let's do this-- use a one-to-one transfer gearbox to drop the output shaft of the engine, reverse rotation and send more power to the torque converter." "I didn't come here for you to just do it for me." "I thought we were gonna work on this together." "Yeah, we are, I'm" "I'm just trying to speed up the process." "Why?" "What, you got somewhere better to be?" "No, Wally, I'm" " Wally." "All right." "Do you have a problem with me?" "Who could have a problem with you?" "You're Barry, right?" "You're perfect." "Never do anything wrong." "Always this, always that." "Wally." "I mean, take a look around you, man." "You're in every picture in this room." "You know, thanks for your help, but I'll just take care of this myself." "Where's the Flash?" "I know the Flash is here." "I can smell him." "Everybody get out!" "Come on." "All right, come on." "Where is he?" "Right here!" "Flash, Zoom wants you dead!" "Yeah, I know." "Then you get to go home, right?" "Well, guess what, man." "The breaches that Zoom used to bring you here, they're all gone." "I closed 'em, for good!" "There's no more Zoom." "There's no way back to your Earth." "You're gonna be locked up here for a very long time." "You might be fast, but not as fast as I am in water!" "You're not gonna catch me, Flash!" "Okay." "You okay?" "Oh, yeah, I'm good." "Think he broke a few things, but I'm good." "I don't suppose my homeowner's insurance covers a "Sharknado" attack." "I don't understand you people." "Jaws busts through your house like the Kool-Aid Man, the Flash shows up, and y'all just act like it's no big deal." "Yeah, well, we've had a lot of weird things happen in Central City over the past two years." "Weirder than a talking shark wearing pants?" "Man, you'd be surprised." "Hey, you guys." "Everybody okay?" "Yeah, yeah, we're fine." "What'd you go hide under your bed?" "Wally, come on." "You know, Joe and Iris told me a lot about you, made it out like you could walk water, or something, but they never mentioned anything about you being a coward." "Okay, enough!" "See you guys later." "Dad, you need to talk to him." "No." "It's fine, I get it." "Look, I know you guys love me, but please stop telling Wally all this great stuff about me." "Start telling him the truth." "I'm not perfect." "I make mistakes that even the Flash can't fix." "Okay." "What happened with you on Earth-2?" "The truth." "I shouldn't... tell you guys this, but..." "I met your doppelgangers." "You were the cop in the family, a good one too." "I told you I would've made a good cop." "Don't get any ideas." "What about me then?" "You were a lounge singer." "Yeah, you had this amazing voice, actually, but you didn't like me at all." "You actually blamed me for Iris becoming a cop, said that she only became one" "To help her selfish husband's career." "Wait." "We were married?" "And we went to go see Joe perform." "And that's when everything went wrong." "Um, some metas that worked for zoom showed up, they were looking for me." "They knew I wasn't supposed to be there, and they attacked, and you got caught in the crossfire, and..." "You died." "I knew that it wasn't you, that none of that was this life, but..." "I mean, watching it happen in front of me, living that, it didn't feel any different, because it was all still real." "And Jay warned me not to get emotionally sucked in when I went there," "and then that's exactly what happened." "And now Joe West on Earth-2 is dead, because I showed up." "Barry, that-- that's not your fault." "Yeah, it is my fault." "It's all my fault." "Zoom, this King Shark," "Jay's death, it's all because of me." "And then I just left an entire world at Zoom's mercy." "Just when you thought it was safe to go back in the suburbs," "King Shark shows up at your house." "I mean, I don't even know how he found me." "It's not like I was the Flash while I was at home." "Must be a reason." "Yeah." "Have you figured out a way to track King Shark yet?" "No, I don't have enough information to create an accurate location algorithm." "What about Dr. Lamden's research?" "Anything that can help us?" "I didn't think so at first, but then I found something that I think might help us." "Sharks are predators." "In order to track their prey, they use what's known as passive electrolocation." "Passive electrolocation?" "Yes, it's how they sense the bioelectric potential around a fish's body." "King Shark senses electricity in Barry's system." "Okay, that explains how King Shark can track Barry, but how is that going to help us track him?" "We flip it." "Instead of King Shark being the predator, we make him the prey, and track him using active electrolocation." "We reprogram our satellite to generate a specific electric field and then measure any electrical distortions that correlate with a 1-ton walking shark." "That'll help us get him." "You help me out?" "Sure." "Great." "Let us know when you locate him and we'll take it from there." "Okay." "Let's get the team ready." "What exactly is that?" "That, my friend, is bait." "You made a Flash lure?" "It's the best I could come up with given the time frame." "It's rigged to mimic and enhance the electric field Barry's body generates." "King Shark takes one whiff of that, cue the "Jaws" soundtrack." "Also stuffed it with enough tranqs to knock him out for a month." "Should make him a lot easier to reel in." "And that container." "Strong enough to hold him once he's sedated?" "It's made of promethium metal." "It's impenetrable." "Meanwhile, we'll be able to keep track of King Shark with this, and the cameras that are on the lure." "Whatever he does, we'll have eyes on him." "All right, then." "Let's go fishing." "Caitlin, I don't understand why" "I can't be the one playing Quint in this scenario." "I should be the one out there, not you." "I need to do this." "You know Quint dies, right?" "Water is this monster's natural habitat." "He's gonna be a lot stronger here." "You sure about this?" "This ends tonight." "Maybe he's not gonna fall for this" "He's a shark." "He'll come." "Anything, Cisco?" "Uh, nope, nothing that looks like it could be him." "You programmed the satellite though, right?" "Yes, Harry." "I mean, you punched in the correct parameters?" "You're insulting my intelligence." "But they've been waiting for hours." "I know they've been out there for hours, but you're insulting my intelligence with this, okay?" " I know." " Okay." "Hey, you set the right distortion scope, right?" "Oh, for real?" "Okay." "You know what, we're gonna play a game here." "It's called, if you're from Earth-2, you're gonna be quiet, okay?" "Yeah." "Hey, Barry, are you okay?" "Ever since Zoom beat me here and on Earth-2," "I've been running away from things, instead of towards them." "That needs to change." "We'll get you back there." "I know." "Think of this as your first step." "Or swim." "Uh, hey, guys." "What is that?" "The big Kahuna." "Guys, incoming." "He's headed for the bait!" "He ate the lure!" "Reel him in, all right?" "Come on." "Where'd he go?" "He's headed for the docks." "Go, go, go." "Get ready to fire!" "Those guns won't stop me, Flash." "First I'll kill you, then I'll kill them." "Oh, yeah?" "Let's do this then!" "Come on!" "What is he doing?" "He's electrifying the water." "Now we can reel him in." "Hell of a catch, Barry." "Yeah." "Let's just make sure he doesn't become" ""The one that got away."" "Won't let that happen again." "What are you gonna do with him?" "I don't know yet." "But one thing's for sure," "A.R.G.U.S.'s plans to turn King Shark into a weapon died with Amanda Waller." "I think our time would be better served learning about how he came to be and how to cure him." "You know, you should really talk to Dr. Lamden." "She's done a lot of research, and I think it could be helpful to you." "I'll do that." "Nice to see you again." "Well, thanks a lot, Dig." "Hey, I got to thank you, Barry." "Got Lyla get her first win," "I got to watch you run on water." "It was biblical." "Look, Barry, when I was in Afghanistan," "I lost a lot of friends-- brothers." "So losing Jay, I know what it feels like." "Question yourself." "Blame yourself for his death." "And that guilt, it can tear you apart, but trust me, man," "You got to get control of it," "Or it'll rip you up inside." "Use this, man, let it guide you, so it never happens again." " All right, thanks, man." " You got it." "Say hi to everyone for me, all right?" "I will." "Yeah, okay." "That's kind of freaky." "Yeah, yeah, see?" "I told you." "Hey, Oliver, what's up?" "You're a really slow reader." "So?" "I want one of these super cars." "I mean, especially if I can run it off the bacon grease I collect?" "I mean" "Man, Wally." "I'm so impressed." "Thanks." "But Barry gave me a lot of help, so..." "Yeah, he did, but this was all your idea," "This is your hard work." "It's all you." "Barry'd say the same thing." "Would he?" "Look, Wally." "Iris and I took Barry in when he was 11, and the reason he came to live with us is because his mother was murdered, and his father was wrongfully imprisoned for it." "And I have been overprotective of that kid since that day." "We gave him all the love and support he needed to get through that tragedy and become the man he is now." "So that--that pride you see when iris and I are talking about him, is because... things could have gone very differently." "But he's not perfect, and he's not favored over you or Iris or anybody else." "So you have nothing to worry about." "He's my son... just like you are." "What are you doing with those?" "I'm adjusting the wavelength trigger," "See if I can get these to work over here." "So you can catch some breachers?" "dear god!" "Caitlin, your hands are freezing." "Caitlin." "I've always hated that name." "Oh, no." "No, no, no, it's starting." "You're starting to become" "Killer Frost?" "That ain't right." "That ain't right, that's just rude." "Who put you up to this?" "Barry put you up to this, didn't he?" "Oh, I should've know you two were" " Cold?" " Yeah." "You deserve it for thinking that I could ever become like her." "Cisco, you need to stop worrying about me." "I may be sad, I may want to be alone for a little while, but I promise you," "Killer Frost will never exist on this earth, okay?" "Besides, you tested me." "I don't even have the meta-human gene," "So please stop worrying about me, okay?" "Okay." "Come on, Barry wants us upstairs." "For real, though, you got to work on that circulation." "You might have Raynaud's or something." "You know what Raynaud's is?" "I'm a doctor, Cisco." "Hail, hail, the gang's all here." "What's good?" "I need to apologize to you all." "Last year I made a choice to go back in time and save my mother, and that choice had a lot of consequences that will haunt me for the rest of my life," "just like I know it haunts all of you too." "Zoom," "Jay's death... it's all because of me," "but I own those choices." "We're the ones who opened the door to Earth-2." "We're the ones who brought Zoom here, but we are also the ones who are gonna stop him." "How?" "How are we gonna stop Zoom, Allen?" "I don't know yet." "But those breaches aren't closed forever, and we're not done with Earth-2." "Jay's death was not in vain." "We will meet Zoom again, and the next time, I will beat him," "whoever that monster is." "Well, this is a complication."