Peter was taking a stroll through the park while the team was working on the tachyon enhancer when he runs into someone who looks exactly like Jay. He then thinks it must be his doppelgänger from their earth.

"I'm sorry, have we met before?" The man asks Peter, since he's looking shocked.

"No, I'm sorry. It's...Have we?" Peter asks him.

"Hunter Zolomon." The man greets him and holds his hand.

"Peter Parker." Peter greets to him.

"The name help ring any bells?" Hunter asks him.

"No, I'm sorry. It's just I know someone, his names Jay. Kind of a...there's no nice way of describing him." Peter explains to him and he understands.

"Yeah, I've been told I have one of those faces." Hunter tells him and they laugh.

"Oh, I've gotta go. I'm meeting with some friends." Peter apologizes and leaves and wonders if he can find out more about this guy.

-

He returns to Star labs and sees the group trying to figure out how to open a breach back to Earth-2, and judging by the boards and equations it's not going well.

"Wow. I'm guessing you guys are running out of ideas?" Peter asks his friends.

"Well, the best we have come up with so far is to set off a nuclear warhead next to the city's electrical grid, so..." Cisco tells him.

"Yeah, were not doing that." Barry tells them, stating the obvious. "But I think I thought of something." He tells them and they look to Harry. "Tell us everything you know about Cisco's doppelgänger."

"Reverb. He could tap into the multidimensional energies between Earths. He could see through dimensions. Find breachers, like Ramon." Harry tells him.

"We saw Reverb do more than that through, right? I mean, we saw him shoot vibrational bursts out of his hands." Barry tells them.

"Yeah, very painful one's." Peter states remembering the blast he was hit with during that fight with Frost.

"What do you mean?" Caitlin asks Peter, just hearing this now.

"It means Reverb had the ability to somehow manipulated that multidimensional energy. If his powers are linked to the energy that ties together the multiverse, and manipulate it. Maybe he can open to any earth he wants." Barry explains, and they see some idea.

"So if Reverb could do it, maybe Cisco can too." Says Peter, seeing the idea.

Cisco is a little skeptical, but decides to go ahead and see if he can.

-

They're in the basement and trying to help Cisco control his powers enough to open a breach and he doesn't think he can do it.

"Come on, Cisco, I know you can do it." Peter encourages his friend.

"Maybe were just not in the right place." Barry tells them.

"Or maybe I'm not the right man for the job okay? Let's go." Cisco says and leaves.

-

Later on they find a building with the most trans-dimensional energy, the perfect place to try opening a breach easily.

"For real? In this Patch Adams nightmare right here?" Cisco asks looking around the abandoned hospital.

"Look, if this doesn't work, I'll stop asking you to do this, all right?" Barry promises to him and he's ready.

Cisco's trying to use his powers and says he can't do it, when Harry comes back with Cisco's glasses he uses to vibe.

"You're not gonna stop, then I'm gonna do what I can to make sure you don't get you or Peter killed." Harry tells him and hands Cisco the glasses. "I recalibrated these to the electromagnetic frequency of this earth. It should help you access enough of the trans-dimensional energy to manipulate it into a breach."

"Just like Reverb. All I'm missing is the guyliner and the transformations complete." Cisco states and places them on and tries oncemore to open a breach, and it starts working.

A breach starts to slowly open to give them a path to Earth-1 until he suddenly stops.

"No, I can't do this. Don't ever ask me to do this again. Please." Cisco begs and leaves them.

-

Harry found a way to shrink the tachyon enhancer so that it can now fit underneath his emblem instead of it being all across his chest.

"Is Cisco back yet? Have you seen him?" Barry asks everyone.

"Haven't seen him. Might be in his workshop." Peter tells him, when Joe and Iris come to offer their help.

Joe and Barry get into a conversation about Wally not wanting Joe to help pay for a place to live, and he wants to move in with Joe.

Caitlin and Iris watch the two of them from the medical lab. "They really have a special bond, don't they?" Caitlin asks watching them.

"Yeah, they sure do." Iris comments seeing them and Caitlin sees she's hiding something.

"You okay?" She asks.

"I don't know what I am. Last night, I was supposed to go on a date. My first date since Eddie died, but at the last second, I just couldn't do it." Iris explains to her.

"Is it because of Eddie or because of Barry?" Caitlin asks since she's been looking at him differently lately.

"Is it that obvious?" Iris asks.

"Only to a woman who's been through the same thing." Caitlin tells her.

"Would this have anything to do about recent rumors spreading about you liking a certain spider based hero?" Iris wonders and that causes Caitlin to blush on how her feelings could have become rumors.

"Do you believe in destiny, Caitlin?" Iris asks her, since destiny seems to have brought Peter to her and everyone believes they would be perfect for each other as they're the only two who don't see how they feel for each other.

"Maybe for you. But Peter and I are friends. Nothing more than that." Caitlin states, but Iris can see right through her knowing she wants more than just friends.

-

Peter goes in and sees cisco is messing with his glasses.

"Look, man, I know what it's like...some enemy getting into your head, how scary they can be." Peter says, trying to assure his friend.

"It's not that, Peter. It's me. It's like right now I'm Anakin Skywalker. I got the midi-chlorians. I got the goods. But the force is strong with me. That is something I can feel. But if I start opening opening breaches into other worlds, doing all this other crazy stuff Reverb has done, then...what if this is how I become Vader?" Cisco explains and asks his most trusted friend.

"Dude, you're never gonna become Vader." Peter says and remembers when he turned into his own Vader. "Look, I know how it feels to loose your way...to want to give into dark desires. I did that when I had Venom attached to me. I felt the power. It made me feel...amazing. I felt invincible, I could jump higher, lift stronger weights, I was bulletproof for crying out loud. But what I didn't realize was that I was loosing myself. But the only reason I realizes that the power was controlling me and not the other way around, was because I had my friends. Ronnie helped me realize that thing was using me, manipulating me to do whatever it wanted. Just like I did, you have one thing that Reverb didn't have. You have friends to help you through this. We're basically family by this point. So what do you say? Wanna give it another shot?" He asks Cisco and he sees that Peter's right.

It's the deeds that make the man, not the other way around.

-

Caitlin was just working on something, when one of Peter's tabs on Hunter came back up and she sees it.

"Peter, who's Hunter Zoloman?" She calls out.

"Oh, I was at the park this morning while you were testing Barry's speed, and I found someone who looked exactly like Jay." Peter explains to her. "His names Hunter Zolomon."

"Hunter Zolomon?" Harry asks, overhearing them. "Are you sure?" He asks Peter.

"Yeah, I met him in the park this morning. Why?" Peter asks, not understanding but sees Harry's expression becomes serious.

"Because on my Earth, Hunter Zolomon was a convicted serial killer." Harry explains and pulls up articles from his killings.

"That's Jay?" Caitlin asks seeing the long hair and beard the man in the footage has.

"No, that is Hunter. Last public photo of Hunter Zolomon. Instantly recognizable. And on my Earth, serial killers are so anomaly, so a lot of media attention to this." Harry starts explaining to everyone in the room. "There was a podcast. When Hunter was 11, his father killed his mother right in front of him. Father sent to prison. Hunter grew up in the foster care system."

"And by the look of things, fast forward years later he is convicted on 23 counts of murder." Barry states.

"23? That's like some real Hannibal Lecter type leaves." Cisco comments, seeing that Zoom was always a psychopath.

"After the trial, Hunter was sent to the saint Perez mental asylum for the criminally insane daily electroshock therapy. Cure him of his urges and then faded from view. Until the night the accelerator exploded. The dark matter crept into the mental asylum. I had thought...piping the explosion underground would limit exposure." Harry explains as he knows everything is his fault. "All it did was create a unstoppable monster."

"Even powers have a sense of irony." Peter says, regarding Zoom's powers. "The thing that was being used to hurt him is his power."

"But he's not unstoppable. Jay doesn't know that we know who he really is. He already knows that we know who Zoom is, but now we know who Jay really is. He thinks his past is a secret." Barry tells them.

"I have a feeling you have a plan." Peter says and that's exactly it.

-

They hide Harry, Iris, Joe, Jesse, Caitlin and May into the Time Vault so that Zoom can't get to them while Peter is waiting in the training room of Star labs ready to take down Zoom with the Boot, curtesy of Cisco, when Barry gets him and they use the trap.

Cisco starts opening a breach when Zoom leaps out of it and Cisco runs off.

"Reverb's doppelgänger has increased his powers." Zoom states to Barry.

"Hatred is a strong motivator, Jay." Barry states to him, ready to end this guy.

"You were unwise to reopen the breach." Zoom informs him.

"I'm not gonna let you terrorize another world anymore." Barry informs him.

"Without your speed, you won't be able to stop me." Zoom states when Barry speeds off with Zoom on his tail and they head straight for Star labs where Peter is waiting for him.

Barry is picking up speed and is running even faster than Zoom now and makes it to the labs first.

-

Barry comes to a stop in the halls of the labs.

"You have gotten faster. Good. There'll be more for me to take." Zoom says, happy that the faster Barry gets, the faster he becomes.

"You want my speed?" Barry asks and starts playing around with speeding off, but that only intimidates Zoom. "Catch me." Barry says and speeds down to the training room.

As they speed around, Peter waits for the right moment and releases the cardboard cut out of Hunter's father.

Zoom stops to look at it and starts fighting Barry again, when Peter shows the cutout of his mother, causing Zoom to loose focus long enough for Peter to shoot him with the boot.

Zoom falls to the ground as it shocks him and the two heroes approach him and remove his mask.

"It's nice to see we all wore our best suits for the reunion, Hunter." Peter quips to the speedster.

"How did you figure out who I was?" Hunter asks the heroes as they remove their masks.

"Peter learned who your doppelgänger was." Barry tells him.

"You're a smart kid, Peter." Hunter admits. "I should've known your senses would've given me away, but I needed to do something to get Barry to want to be faster."

"Speaking of which, you and I are going to have a talk about you breaking my back." Peter promises to him.

"I'm dying, heroes. I'm getting desperate, and only your speed can save me now." Hunter tells Barry.

"And you just don't care how many lives you destroy trying to get it?" Barry asks the maniac. "How many people you kill?!"

"No, I don't!" Hunter screeches at them. "That feeling was taken from me a long time ago." He tells them and Barry walks away from him.

"You know, the three of us aren't so different. What happened to us all when we were all kids." Hunter states and that makes the heroes angry. "Both of you could have just as easily became me."

"No. We'd never become like you." Peter tells the criminal.

"I got to say...that was smart. Using my parents against me." Hunter congrats while looking at the cutouts. "Family. Such a weakness." He says to them.

"Not to all of us." Says Barry.

"Well, that's where your wrong." Hunter says while trying to stand with the Boot on him. "It's time I get what I came for."

"You mean your backside being whooped, or Barry's speed?" Peter asks. "Because I can promise you the whooping."

"You're not getting anything from anyone ever again." Barry states to him since now he's their prisoner.

"You can't lock up the darkness." Hunter whispers, and they didn't hear him.

"What did you say?" Peter and Barry ask him.

Hunter looks up to them and his eyes go pitch black.

"You can't lock up the darkness." Zoom repeats and was able to phase the boot off and he takes off running.

Barry begins chasing after him, but he wasn't able to keep up this time.

-

Later, they learn that he broke into the West's home and left a mess while kidnapping Wally to trade him for Barry's speed.

They go through with the deal and Zoom returns Wally while they prepare to drain Barry of his speed.

"This is how we were gaining Barry speed, but I reconfigured it so now all Barry has to do is run, and the Speedforce will transfer into this vial. But only as long as I calibrate it." Harry tells Hunter and none of them wanted to be in this position.

They thought they've finally seen the last of him and now he's getting what he wants.

"So this was your plan all along, huh?" Peter asks Hunter.

"Ever since the skies parted and showed me another world, with another speedster. Once I saw you, I came here, figured out what I had to do." Hunter explains to them all.

"Who's The man in the mask?" Barry asks, referring to his prisoner in his cave back on Earth-2.

"You wouldn't believe me if I told you." Hunter states to him.

"Try us." Peter dares, getting an angry stare from Hunter.

"Why the charade? Running around dressed like the Flash?" Joe asks since nobody understands why he would pretend to be a hero.

"To give people hope, detective." Hunter tells them and now that's confusing. "So that I can take it away from them. It's so fun pretending to be a hero."

"You're no hero." Caitlin states to Hunter. "You're nothing but a monster." She says and they're ready to start draining Barry's speed.

Barry goes onto the treadmill and starts using his speed and they all watch as he starts slowing down and all of his speed is being transferred from him.

"He's becoming human again." Cisco informs the team as Barry falls to the ground and Peter checks on his friend while Hunter takes the speed and gains even more speed and becomes even faster.

As soon as he gets it under control, he speeds in and grabs Peter by the neck and throws him against the wall.

"Now there's only one more pest I need to deal with." Hunter states and starts choking Peter who's trying to pry himself free.

Harry raises his gun to Hunter, but they all know it's useless. It couldn't stop him before he got faster. "Jay, please, you have to let him go." Caitlin pleads to him not wanting Peter to die.

"I know some piece of you cared for the team, so if you have any humanity left, then please, let him go." She begs and Hunter drops Peter, while he was gasping for air, Hunter took the opportunity to kidnapp Caitlin.

"CAITLIN!!" Cisco shouts as Zoom speeds off and both heroes realize now they both fail.

But Peter does promise one thing, Hunter's going to pay for this, and get her back.

Whatever it takes.