Disclaimer: I do not own DC Comics or the CW TV shows Arrow, The Flash, Legends of Tomorrow, Supergirl or any other characters or elements pertaining to the mentioned franchises.

"Caitlin…" Barry trailed off, all of them processing Jay's death.

Caitlin stared in shock, shaking her head in denial. "He's not dead. He's not dead."

"Caitlin..."

"He's not dead. He's not."

"Caitlin—" Patty started.

"This isn't happening. This isn't happening again." Caitlin's voice broke.

"Hey, I got you. Come on." Cisco held her, accompanying her out.

"Open it up." Barry ordered.

"Allen—" Harry attempted to protest.

"I need to go back." Barry said.

"I can't do that." Harry said.

"Open it up!" Barry exploded, whirling on Harry.

"Allen! The breaches are closed. All the breaches are closed." Harry said calmly.

"Can't we just open one of them?" Patty asked.

Harry shook his head. "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." Jesse stared in shock. "We're trapped here for good?"

"Yes." Harry said as the somber atmosphere was filling the room.

"No, we can't just let Zoom get away with this. He just murdered Jay right in front of us." Barry snapped.

"There's got to be something we can do." Joe said.

"There's not. Not this time." Harry said as Barry looked saddened. "It's over."

Barry walked off, angry.

Caitlin was in the infirmary, sleeping on one of the stretcher as Barry checked in on her. "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." Cisco said.

"First Ronnie, now Jay." Barry whispered.

"It has to be hard for her. She lost two people she cared about." Patty said lowly.

"Yeah. I'm afraid what this double dose of grief is gonna do to her. I mean, she's pretty shell-shocked." Cisco said.

"She'll be fine. Snow's strong. She'll get past this." Harry said. "But in the meantime, I would not say anything to her about her counterpart from my Earth."

"What? Why? You met her doppelganger?" Patty asked.

Barry was about to open his mouth as Harry cleared his throat. "Trust me, Spivot, you're better off not knowing."

"Why?" Barry asked.

"Because you don't want to influence their reality in ways that should not be influenced." Harry explained.

"Like in the same way as when Barry time-travels?" Cisco realized.

Harry nodded. "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."

"Some things we're better off not knowing." Patty realized and Harry nodded.

"Yeah. That I can do." Cisco nodded.

"Fine." Patty nodded. "No questions asked."

"Allen?" Harry turned to Barry, who nodded.

Later, CCPD

"Allen. The McCollough's disappearance case. Allen!"

Barry came to as Julian banged his desk. "Sorry. I… my mind's miles away."

"Is everything alright?" Julian asked.

"Just… had some few tough weeks, that's all." Barry said.

"Well, you better get your head back in the game. The CSI work isn't going to get done all by itself." Julian said, walking off.

Patty approached Barry's desk. "Hey, I just wanted to check in on you. Is everything OK, Barry?"

"I…" Barry paused.

"Barry, you don't need to tell me what happened on Earth-2, if you don't want to. I won't make you. But if there's something I can do for you…" Suddenly an idea sparked in Patty's brain. "Wait, how about we head down to get some ice cream, maybe that'll get your mind off things."

Barry considered. "Fine."

Patty smiled as he smiled too, going out and holding hands.

Later, S.T.A.R. Labs

"Hey." Barry and Patty were entering the Cortex as Caitlin walked off, while Cisco stared.

"Did you hear that?" Cisco asked.

"No, what?" Barry asked.

"Caitlin just bit my head off. She's been all business, no emotion lately. She's been... cold." Cisco said.

Barry raised an eyebrow. "Cold? Come on, Cisco."

"Uh, what is going on?" Patty asked, confused.

"Nothing." Barry assured.

"Is this related to Earth-2?" Patty asked.

"Look, Patty, let it go, OK?" Barry said.

"OK, I wasn't going to ask but if it's that bad, then I think I deserve some questions answered." Patty said, glaring.

"Patty, don't ask, OK? All we need to do right now is to give her time to heal We just got to be there for her, keep her busy." Barry said.

"That shouldn't be a problem." Diggle said, upon entering with Lyla.

"Hey, Dig, Lyla. What are you guys doing here?" Barry asked, confused.

"We came to give you the heads-up, Barry." Diggle said.

"About what?" Barry asked.

"A metahuman who escaped from A.R.G.U.S. custody, goes by the name 'King Shark'." Lyla said.

"King Shark?" Patty's eyes widened as she shook her head. "No. No, no, no, no, no, that's impossible, he's dead. Barry and I watched Wells kill him."

"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." Diggle looked at Barry grimly. "That's kill you, Barry."

Barry scoffed as Cisco and Patty paled.

"We're gonna need a bigger Flash." Cisco muttered.

"Oh, boy…" Patty said and Barry sighed in frustration.

"So how do you know about King Shark?" Barry asked as Diggle and Lyla were debriefing him, Patty, Cisco, Caitlin and Harry.

"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." Diggle explained.

"And it appears under her directives, A.R.G.U.S. had been monitoring metahuman activity for the past two years." Lyla said.

"Why?" Caitlin inquired.

"Well, to see if any of those powers could be… exploited." Diggle said.

"Weaponized." Harry realized.

"How do you know that he's coming after me?" Barry asked.

"While in our custody, he kept saying the same thing. 'Zoom wants the Flash dead.'" Lyla said and Barry sighed before she turned to the monitors. "And although he removed the tracker we had in him, the readings we did receive show he that was headed towards Central City."

"Let him come." Barry said.

"Barry, this thing is a killing machine. We just came here to warn you, man. Let A.R.G.U.S. handle it." Diggle said.

Barry shook his head. "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." He turned to Harry. "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." Harry summed up.

"So how did you track him when he attacked Barry?" Caitlin asked.

"Zoom sent him to this Earth to kill Barry. I just followed." Harry said.

"You were able to find Grodd. Do you think you can find King Shark too?" Patty asked.

"I can try." Harry said as he left the Cortex.

"All right." Barry turned to the monitors. "OK, 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." Caitlin said.

"I can take the waterfront. Can you have your team handle the rest?" Barry turned to Lyla and Diggle.

"I'll get them on it." Lyla nodded.

"All right." Barry turned to Caitlin. "What about Dr. Lamden's doppelganger? Maybe he could help us somehow."

"Or not. Looks like he died when the particle accelerator exploded." Cisco said, looking at Lamden's profile.

"Any relatives? Next of kin?" Patty asked.

"He's got a widow, Doctor Tanya Lamden. She's a research scientist at Nautilus Labs, and she studies... wait for it... sharks." Cisco said.

"Maybe the two of you can go and see if she's discovered anything in her research that could help us." Barry suggested.

"Sure." Caitlin nodded.

"Great." Cisco nodded as they got up and left with Diggle.

Barry answered Joe's call. "Hey, Joe, what's up?"

"Hey, Bar, I talked to Wally, he wants to meet up with you." Joe said.

"All right."

"He's working on his engineering project at our place tonight. He would love some help from that big brain of yours."

Barry sighed. "OK, Joe, look, I'm sorry, right now is kind of a crazy time."

"What? What's going on?" Joe asked.

Barry turned on the speaker as Patty spoke up. "That metahuman giant shark that attacked me and Barry few months ago, he's alive, he's escaped A.R.G.U.S custody and is coming for Barry."

"I get it." Joe said. "I'll tell Wally some other time."

Later, Central City

The Flash was at the coastline, helping Lyla and Diggle and A.R.G.U.S. operatives search for King Shark before Barry returned to Lyla and Diggle.

"Anything?" Diggle asked.

"No, man, nothing yet." Barry shook his head.

"Yeah, so far, nothing on our end either." Diggle said.

"Let's just hope Wells and Patty are doing better than we are." Barry said. "Hey, how's Thea doing?"

"She's recovering, she'll be on her feet in few days, don't worry. Thanks for the concern." Diggle assured.

Barry sighed. "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."

Diggle narrowed his eyes at Barry. "You're 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." Lyla said before reaching for her comms. "Status check, grid six."

"Hold on, I think we got something."

As Barry, Lyla, Diggle and Patty checked in on grid six, they found a bloody mess instead of where the A.R.G.U.S. agents were as the cleanup team was sweeping the scene.

Lyla sighed. "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." Diggle assured.

"All right, I searched the whole area. He's gone." Barry said as he approached them.

"Couldn't have gotten far." Diggle said.

"He knows we're looking for him, he'll be on guard." Patty said.

"Not if Wells can figure out a way to track him." Barry pointed out.

"In the meantime, we'll keep looking." Lyla said. Barry sped off as Diggle stared and Lyla chuckled. "He's fast, John, get over it."

"Never." Diggle stared, uncomfortable from seeing Barry running.

Patty's apartment

Patty was cooking a steak as Barry smiled at her, while they sat down.

"Is something wrong, Barry?" Patty asked as he was remembering what he had seen on Earth-2.

"Nothing, it's just…" Barry smiled. "I'm just trying to enjoy what we have. Wouldn't trade it for anything."

"Me neither." Patty smiled as they ate. "You've been acting a bit little differently since you came back from Earth-2. I understand that it must have been crazy but… if you ever need to—"

"Shhh." Barry raised his hand. "Did you hear that?"

"What?" Patty asked before suddenly, King Shark burst in through the window.

"Where's the Flash? I know the Flash is here. I can smell him. Where is he?" King Shark roared as Patty gasped, pulling out her gun and firing.

"Get out of here! Go!" Patty ordered as Barry ran off and a few moments later, the Flash knocked King Shark down, as he crashed against the pavement before getting up.

"I'm right here!" The Flash called out.

King Shark growled as he got up. "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 them, for good!" The Flash said and King Shark growled. "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."

The Flash sped around King Shark but King Shark knocked him away as the Flash crashed against a car before he heard car tires screeching and A.R.G.U.S. agents were showing up.

"You might be fast, but not as fast as I am in water! You're not gonna catch me, Flash!" King Shark said before running off.

The Flash got up on his feet as Diggle and Lyla neared him.

"You OK?" Diggle asked.

"Oh, yeah, I'm good. Think he broke a few things, but I'm good." Barry groaned and panted out.

"Thank God you're OK." Patty hugged Barry tightly as she ran towards him.

"Yeah. No matter what happens, I'm always gonna come back to you." Barry said.

Later, S.T.A.R. Labs

"I think you need to tell your people to fix my apartment, when this is over. How did King Shark even find out where Barry is? It's not like if Barry was dressed up as the Flash." Patty wondered as she glanced at Diggle and Lyla.

"Must be a reason." Diggle noted.

"Yeah." Barry nodded as he turned to Harry. "Have you figured out a way to track King Shark yet?"

Harry shook his head. "No, I don't have enough information to create an accurate location algorithm."

Barry turned to Caitlin. "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." Caitlin turned on the monitors. "Sharks are predators. In order to track their prey, they use what's known as passive electrolocation."

"Passive electrolocation?" Diggle repeated.

"Yes, it's how they sense the bioelectric potential around a fish's body." Caitlin said.

"King Shark senses electricity in Barry's system." Harry realized.

"OK, that explains how King Shark can track Barry, but how is that going to help us track him?" Lyla questioned.

"We flip it. Instead of King Shark being the predator, we make him the prey, and track him using active electrolocation." Caitlin said.

"We reprogram our satellite to generate a specific electric field and then measure any electrical distortions that correlate with a one-ton walking shark." Cisco explained.

"That's gonna help us catch him." Patty realized.

"You help me out?" Harry turned to Jesse.

"Sure." Jesse nodded.

"Great." Harry said as he and Jesse walked into the labs.

"Let us know when you locate him and we'll take it from there." Lyla said.

Later, Central City

Barry, Diggle, Lyla and Patty were at the shore with a Flash mannequin attached to a buoy at the sea, ready to catch King Shark.

"Water is this monster's natural habitat. He's gonna be a lot stronger here." Diggle said. "You sure about this?"

"This ends tonight." Barry said as they waited patiently but after a little while later, they had to wonder whether their plan would work.

"Maybe he's not gonna take the bait." Patty said.

"He's a shark. He'll come. Anything, Cisco?" Barry called out.

"Uh, nope, nothing that looks like it could be him." Cisco said.

Caitlin and Patty noticed how on edge Barry was. "Hey, Barry, are you OK?"

"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." Barry said.

"We've got your back." Patty assured.

"I know." Barry nodded.

"Think of this as your first step. Or swim." Caitlin noted, at least succeeding in making Barry smile.

"Guys, incoming! He's headed for the bait!" Cisco called out.

Caitlin looked at her tablet and saw King Shark swimming towards the buoy, biting off the mannequin. "He ate the lure!" She cheered.

Diggle attempted to reel in the bait but King Shark had let it go. "Where'd he go?"

"He's headed for the docks." Cisco said.

"Go, go, go." Barry ordered as Caitlin and Patty ran off.

"Get ready to fire!" Diggle ordered as Lyla and the A.R.G.U.S. agents were readying their weapons.

King Shark jumped out of the water as the A.R.G.U.S. agents opened fire before he landed at the docks.

"Those guns won't stop me, Flash. First I'll kill you, then I'll kill them." King Shark said.

"Oh, yeah? Let's do this then! Come on!" Barry taunted as he ran off on the water, with King Shark chasing him until Barry started to circle around King Shark, creating a whirlpool.

S.T.A.R. Labs

"What is he doing?" Jesse demanded.

"He's electrifying the water." Harry realized.

Central City

King Shark was trapped in the water whirlpool, electrified until Barry threw lightning, knocking King Shark out as he ran back to the shore, panting out. "Now we can reel him in."

They all laughed as King Shark emerged on the surface of the water, unconscious.

"Hell of a catch, Barry." Diggle said as they left, while A.R.G.U.S. agents were apprehending King Shark.

"Yeah. Let's just make sure he doesn't become 'the one that got away'." Barry said.

"Won't let that happen again." Lyla promised.

"So what are you gonna do with him?" Caitlin asked.

"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." Lyla said.

"Good to know. As long as this freak isn't causing trouble in Central City anymore, I'd be glad, if I didn't have to deal with more reports about a giant shark waltzing around here." Patty said before she and Barry chuckled.

"I think our time would be better served learning about how he came to be and how to cure him." Lyla said.

"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." Caitlin noted.

"I'll do that." Lyla smiled before turning to Barry. "Nice to see you again."

"I should head back to the precinct. Make sure there's no paperwork about a giant shark." Patty said as she and Barry laughed, while she and Lyla walked off.

Barry turned to Diggle. "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." Diggle said as they smiled at each other. "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."

Barry sped off, picking Patty as Lyla stared. "Yeah, OK. That's kind of freaky."

"Yeah, yeah, see? I told you." Diggle nodded.

Later, S.T.A.R. Labs

Barry, Patty, Cisco, Caitlin, Joe, Iris, Harry and Jesse met in the Cortex as Barry faced them all.

"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?" Harry questioned as Barry turned to him. "How are we gonna stop Zoom, Allen?"

"I don't know yet." Barry admitted. "But those breaches aren't closed forever, and we're not done with Earth-2." He pulled the sheet to reveal Jay's helmet in a glass case. "Jay's death was not in vain. We will meet Zoom again, and the next time, I will beat him, whoever that monster is."

Earth-2

The man in the iron mask stared in shock as he saw Zoom enter, dropping Jay's body on the floor. Zoom took off his mask to reveal the face of Eddie Thawne. "Well, this is a complication."

Didn't see that one coming, did you?

I'll be honest, before the reveal that "Jay" was actually Earth-2 Hunter Zolomon, a.k.a. Zoom, Zoom seemed as a compelling villain but the reveal actually felt like a rip-off of Season 1, with Barry's mentor revealing to be his main enemy of the season, just like with Wells revealed to be Thawne but after that Zoom actually became boring, since, quite frankly, "Jay" didn't really feel like an interesting character to me before the reveal and the romance with Caitlin felt forced and boring. The acting was great but it was cliche and repetitive after the reveal of someone they trusted being the main villain.

Plus, it's quite sad, when you realize that Anti-Monitor's plan to wipe out the entire multiverse is pretty much a rip-off of Zoom's endgame in 2x23, where he wanted to destroy all Earths, save for Earth-1 using Magnetar device and let's face it, Anti-Monitor was cheap Thanos/Apocalypse rip-off, while Zoom was a bit more compelling villain before it was revealed that Zoom was "Jay", which was a rip-off of the reveal with Wells being Thawne (Reverse-Flash).

Zoom's backstory will be explained later. I originally considered Zoom being Earth-2 Barry but that would be a rip-off of Stand with Ward and Queen's "The other side of the mirror", which can be found on AO3. I don't plan on doing a complete rip-off of what Stand did in his story but the reveal is inspired by the story. Plus I'm a little inspired by Thawne's return in Season 6. To those who did not watch it, in Season 6, it turned out that after Crisis on Infinite Earths, while all Wellses, except for Nash, died, they all merged with him, ending up in his brain, alongside Thawne, who had assimilated Earth-1 Harrison Wells's DNA, allowing him to possess Nash's body, so I think you can guess how is this possible. What's quite disappointing is that because of coronavirus, Season 6, which I was enjoying, promised a Thawne cliffhanger in the finale but due to COVID-19 stopping the production, only 19 out of 22 episodes will be aired, with a cliffhanger that will be resolved in Season 7.

I skipped the dinner part, since while it wasn't all that bad and Wally's reactions were understandable, this just doesn't work for the story. And in this verse, Thea is the one that got shot, not Felicity, since we all know how awful Olicity was in that season.

And a side note, before Season 5 of Arrow, where Diggle hypocritically condemned Lyla for locking Cayden James up with no trial, when he did the same thing with Slade and Harkness, I used to think that in spite of Diggle's negative moments, that Diggle/Lyla was more or less one of the better handled relationships in Arrowverse.

So, what do you guys think?

Please review and let me know if you have been enjoying this and want for me to continue.