"So, tell me again how we got to this plan?" Iris asks as she finishes putting lipstick on Caitlin.

"Well, uh, Cisco?" Caitlin asks Cisco who is distracted trying to twist half of his hair into a bun.

"Huh?" He asks. "Oh, yeah, so I remembered I have this really cool black jacket and-"

"Go back further." Caitlin says, rolling her eyes.

"Fine." Cisco groans.

***********************

Cisco, Caitlin, and Harry work on finding the right frequency and intensity to knock all of the Earth 2 metas unconscious. Cisco is very close to the right one, but not quite. Caitlin is on the phone with Hartley instructing Cisco on what to do.

"I think you're enjoying this." Harry groans after Cisco sets off yet another wrong pulse that makes his head hurt.

"Almost there." Cisco announces.

"Hartley wants me to tell you he'd have figured this out a week ago if he was here." Caitlin says.

"We didn't even have the idea a week ago!" Cisco yells loud enough for Hartley to hear through the phone.

"I would have." Hartley says to Caitlin.

"I'm sure you would have."

"So how do you plan on amplifying it?" Hartley asks.

"Cisco thinks we can create a sound barrier around the city."

"Causing the pulse to bounce off itself." Hartley finishes. "And how does he plan to create this barrier?"

"Barry."

"It's a Barry-er." Cisco shouts.

Caitlin can just hear Hartley rolling his eyes.

"Barry isn't fast enough." Hartley comments.

"He's faster than when you last saw him." Caitlin explains.

"Then I guess that'll work." Hartley reluctantly admits. "Look, in all honesty I'm impressed you guys thought of this. I hope it works. Call me if you need any more help."

"Thanks, Hartley." Caitlin hangs up.

"He thinks the barrier will work. Cisco did you get the frequency down?"

"Yep!" He shouts. "So, we just need to release this pulse and after it bounces off the barrier and reaches the right frequency, night-night Earth 2."

"Zoom too?" Caitlin asks.

"Zoom too." Harry says, nodding to her. "And Jessie and I will have these," he holds up the headphones he has been working on for the last half hour, "to keep us from being affected."

"Great." Cisco says half-heartedly. "So...someone call Barry?"

Caitlin calls Barry who picks up Jessie on his way. Cisco explains the plan to them, and Harry gives Jessie her headphones. An alert pulls them from their explanation.

"Ramon! We're up." Harry announces.

"Black Siren is at the high-rise on the west side." Caitlin says, reading the alert. "Hundreds of people will die if that building goes down."

"I don't know how to stop her." Barry admits

"If we release the pulse, she'll go down with it." Harry explains.

"So, we just need to stall her." Cisco says.

"Any suggestions?" Barry asks.

A wild grin grows on Cisco's face. "One."

*********************

"And now I'm wearing a wig and dressed like an ABBA knockoff." Caitlin groans. "How exactly do you get off with an updo and a black jacket and I have to have a complete makeover?"

"I'm naturally more excessive than you." Cisco explains, greasing his hair back.

"You guys are just lucky that costume shop was easy to get into."

"Yeah...um, Iris, did you just steal this stuff?" Cisco asks.

"No. I left money on the counter. Not like they were open. It's a literal warzone out there." Iris defends. "Alright, you're all done."

Caitlin stands up and looks in the mirror at a very good imitation of Killer Frost. "If I didn't feel so ridiculous wearing this, I'd be really freaked out right now." Caitlin says, staring in disgust at the mirror.

"Remember when I said you wouldn't pull off white hair?" Cisco asks. Caitlin nods. "I take it back. You don't look terrible."

"Thanks." Caitlin says sarcastically. She takes a deep breath. "Ready?"

Cisco and Caitlin head to the high-rise and up to the abandoned floor.

"So, what's our story?" Cisco asks.

"Our story?"

"Yeah. Why are we talking to her? What's our motivation? Why shouldn't she kill us?" Cisco rambles.

"Uh, mutiny?" Caitlin suggests.

"Piratey. I like it." Cisco nods. He shrugs his shoulders up and down. "I am evil. I am fire. I am death." Cisco chants to himself.

"Hey, Smaug. We don't actually have anything to attack her with so chill out."

When they get to floor, they hide behind a wall and wait for Black Siren to round the corner.

"Oh, my heart is racing." Cisco whispers.

"We just need to distract her for a few minutes. We'll be fine."

"Unless she screams our brains to mush."

"Yeah. Unless she does that." Caitlin says flatly. "Let's go."

Cisco and Caitlin, eerily resembling Reverb and Killer Frost, make their way out into the room. They line themselves up where Black Siren will see them when she rounds the corner.

"Showtime." Cisco breathes out.

Black Siren walks around the corner and stops in her tracks when she sees two familiar faces. "What are you two doing here?"

Caitlin's and Cisco's hearts start racing. Caitlin can feel the sweat behind her make up. The wig isn't helping.

"Why should you have all the fun?" Cisco says in a voice that perfectly mimics Reverb's theatrics.

"Zoom thinks you two are dead." She spits.

"Let's keep it that way." Cisco says. "What we have planned works best if he doesn't suspect us."

Siren scoffs. "You two think you can pull one over on Zoom? Your death won't be fake for long."

"She isn't ready for this." Caitlin says quietly to Cisco but loud enough that Siren can hear.

"Give her a chance." Cisco defends.

"Ready for what?" Siren snaps.

Caitlin chuckles and looks darkly at Siren. She shrugs at Cisco and they both go to turn.

"Do you know what I'm capable of?" Siren threatens.

"Big talk for someone whose power is screaming." Caitlin scoffs.

"Try it and I'll shatter your entire nervous system without breaking a sweat." Cisco threatens back.

Siren swallows but follows it up with an insincere chuckle. "You two really think you can beat Zoom."

"We're not naive enough to think we have a choice." Caitlin snaps. She takes a step around the unfinished wall her and Cisco were behind and walks toward Black Siren. "You're serving a man who is trying to take down an entire world. Do you really think he's going to keep you around when he's done? If you even make it that long."

"Longer than you two if you try to take him on." Siren points out.

Cisco steps up with Caitlin. "But not if you join us. Why follow someone's orders when you can create your own chaos? We take Zoom out, we're free." Cisco offers.

Siren starts walking around them, eyeing them suspiciously. "If I were interested in forming an alliance with you two...what's your plan?" She asks, now standing behind them.

Caitlin's eyes widen. They had not discussed this part. They really didn't expect to get this far.

"Depends on whether you join us or not." Cisco says trying to kill more time, hoping they're close to releasing the pulse back at S.T.A.R. Labs.

"Let's say I do."

Caitlin turns around abruptly, coming face to face with Black Siren who is smirking at her. "What do you think you know about Zoom?" She asks tauntingly.

Black Siren smiles. "I know his name."

Caitlin scoffs. "Same here, princess. But what do you know about him?"

"Enough to know he can't be beat." Black Siren says, stepping away from Caitlin.

"The only person who can beat Zoom is himself." Caitlin says, causing Siren to turn around. Curious. "You want in, then say it. But we're not giving you the secret to our plan unless you do."

Siren turns, now standing away from Cisco and Caitlin, but facing them. "It was an honor to see him without his mask on. To learn his name. I thought I was the only one."

Caitlin and Cisco relax, thinking they may have gotten her.

"But then he told me...that the weak, pathetic girl he had locked up at the station knew too. Long before I did."

Caitlin swallows at the reference to herself.

"Told me she was the only one." Siren spits.

Caitlin's and Cisco's eyes widen as they realize they've been caught.

"I-I was there when he told her." Caitlin tries to explain. "He had us both locked up on our Earth."

"Oh, really?" Siren asks, stalking toward them. "Then freeze me, Frosty."

Caitlin and Cisco start backing up, grabbing onto each other's arms.

"Thought so." Siren says before stopping and taking a deep breath.

Before she can scream, Cisco and Caitlin lean away and Cisco holds his hand out in defense. A blast comes out of his hand and throws Siren off her feet.

"What the...what?" Caitlin says, lost for words. She turns to Cisco and looks at his hands.

"I don't know." He says, looking at his own hands as if they're something unfamiliar.

"Well do it again!" Caitlin orders in a panic, pointing to Siren who is standing and stalking toward them again.

Cisco closes his eyes and holds his hand out again. Nothing comes out. He opens one eyes to look and just sees a very mad meta getting closer.

"C'mon, Barry." Caitlin whispers pulling Cisco back to her as they huddle away from Siren.

"There is nothing...on this earth...that can stop us." She growls at them, stomping toward them.

She takes a deep breath to scream. Cisco and Caitlin lean into each other, both covering their ears. They look back when they hear a yell of pain instead. Black Siren is kneeling on the ground, covering her own ears.

"It's working." Cisco says, half-pride, half-disbelief.

The two watch as Siren quickly becomes unconscious, falling to the floor.

"That was a close one." Caitlin says, sighing and falling back into the boxes they were huddled against.

Cisco turns on his comm. "Barry! Any chance we can get a pickup before you round up the knockouts?"

They wait for an answer, but not long. They both find themselves in the cortex. Caitlin pulls off the wig, scratching her head like a mad woman.

"This was horrible." She whines. She pulls her hair up into a ponytail and puts on a jacket she keeps in her lab, taking off the uncomfortable leather one she was wearing. She kicks off the high heeled boots and slumps in a chair.

"You thought that was horrible? You know how hard it is to see with these things on? It's like sunglasses on steroids." Cisco whines taking off his goggles, and aggressively ripping the bun out of his hair. "Should be a crime to contain my hair like this."

They both turn when they see Joe carrying Harry into the cortex.

"What happened?" Caitlin asks quickly, jumping out of her chair.

"My headphones weren't working, so he gave me his." Jessie cries.

Joe lays him on the med bed in Caitlin's lab. She checks his pupils and breathing to make sure he's okay then walks into the back of her lab. She walks back with a cotton ball and holds it up to Harry's nose. He starts squinting and sniffs harder, causing him to cringe away from the cotton ball. Caitlin grins and tosses it, sitting next to the bed.

"Well, Cisco, your machine ended up knocking him out after all." She jokes.

"My machine." Harry groans out, his eyes slowly opening. He groans and shifts to sit up in bed. He huffs out of his nose. "What was that?"

"Ammonia." Caitlin says, leaning back in her chair.

"Did it work?" He asks, turning to Cisco.

"Our acting gig or my machine?"

Harry rolls his eyes. "The pulse. The metas, are they all down."

"Barry's rounding them up now." Joe informs him.

"If you guys don't mind, I'm gonna head back to the house and get some sleep." Jessie says. "Cleanup is gonna be nuts tomorrow."

"You are not helping with clean up!" Harry yells as she walks out. She keeps walking. He groans and rubs his head.

"Kids." Joe says, laughing lightly. "Speaking of," he turns to Caitlin and Cisco, "Singh said he saw Iris walking out of a closed costume store carrying, among a few things, a white wig."

Caitlin coughs and turns away. Cisco narrows his eyes guiltily and then looks everywhere around the room except at Joe.

"Technically, we didn't tell her to do that. We asked her to help us look like this." Caitlin defends. "She improvised."

Joe raises an eyebrow at them and coughs an 'uh huh' before walking out.

"You two are bad influences." Harry says.

"Bad influences who have saved yours and Jessie's life multiple times." Cisco argues. He storms out.

"Ramon!" Harry calls. Cisco turns. "We did good today." Cisco grins and nods, walking out.

Caitlin sighs in exhaustion and leans back, rolling her neck.

"Didn't like pretending to have powers for a night?" Harry jokingly asks.

"No." Caitlin laughs. "I'm perfectly happy without them."

"Really?" Harry asks. "I just assumed with everything we all do, you'd want them. Might make things more convenient."

"Not a chance. Powers just complicate things. I feel like I offer enough without them. I hope so at least. Now if they found someone who could magically heal people I might be out of luck."

"You'd still be better." Harry comments.

Caitlin smiles at him and leans forward in her chair. "Harry." She starts. He looks at her, waiting for her to continue. "Um...about Jessie's tests."

Harry sits up more, readying himself for what she's gonna say.

"There was dark matter in her system."

"That doesn't mean she's a meta human." He defends.

"No, it doesn't." Caitlin assures him. "But look, Barry was in a coma for nine months before he woke up and his powers surfaced. There was no sign of metas before that either. We don't know how long it took for people to realize they had them." Harry sighs, rubbing the bridge of his nose. "There is no sign that her DNA was affected. But it is there. So...just be ready."

He nods. "Thank you, Snow."

She smiles. "And we'll help in any way that we can if something comes up."

"I don't know what I'd do." He admits.

"You'd get a few more gray hairs, that's for sure." Caitlin jokes.

"I don't have any gray hairs." Harry defends.

Caitlin smiles and leans back. "Whatever you say."

He rolls his eyes and lays back in the bed.

"What now?" Caitlin asks.

"Now...we get these metas off the street and we rest."

"Do you think it affected Zoom?"

"Yes." Harry says firmly. "But I'm sure he got out in time. Some way."

Caitlin sighs, closing her eyes and dropping her head.

"But he's not ahead of us anymore. We can stop being distracted. We can breathe." Harry assures her.

"You're weirdly optimistic." Caitlin says, smiling skeptically at him.

"All of my people are safe." Harry says, relaxing back. Caitlin smiles and looks down. "Even if two of them currently look like idiots."

Caitlin laughs and stands up to walk out.

"Snow." She turns to look back at him. "Don't tell Ramon I called him my people. I won't hear the end of it."

"Don't worry, I won't."

Barry runs in. "They're all locked up." He says with a proud smile.

"And Zoom?" Harry asks from Caitlin's lab.

"The other metas said he opened a breach and got away."

Harry sighs but doesn't say anything.

Barry turns to Caitlin with a smile. "Black Siren is in the pipeline."

"She's been his right-hand since Rupture. She may know something."

He nods and the two head to the pipeline, picking up Cisco from his workshop on the way.

Cisco turns on the comms when they get in.

"You're all delusional if you think this changes anything." Siren spits. "Zoom can't be defeated. You're just prolonging your own destruction."

"He can be defeated." Barry says. "And you could help us."

"You idiots. Your fake henchmen may have put on a good show, but I only feigned interest to hear their plan. I have no need for freedom or peace. I have Zoom and his vision. And when it's realized," she chuckles, "you'll all burn."

Barry sighs. "Well you won't be there to see it."

She screams, but Cisco turns off the comms quick enough that they don't hear it. "Oh, I'm sorry. What was that?" Cisco teases. "I couldn't hear you through the double-paned glass."

Barry chuckles and looks down at Caitlin who is staring at Black Siren. Cisco turns after shutting the accelerator door.

"We did put on a good show." Cisco pats himself on the back. "You really pulled off a good Killer Frost."

"Yeah...had to spend enough time with her on Earth 2." Caitlin says flatly, turning.

"Cait." Barry gently grabs her arm.

She turns to him. She can tell by the look on his face, on both of their faces, that they want to know. She takes a deep breath and walks out, nodding for them to follow. They all walk up to Cisco's workshop, taking seats around the room.

Caitlin gives a very vague account of her time with Zoom. Mostly where they were and his speeches. What she knew about what was going on outside. Cisco accepts this and hugs her, walking out, knowing there was much more to tell but deciding to let it go.

Barry and Caitlin head home, the sun fully risen at this point. They walk in and Barry goes to put coffee on.

"You're not gonna be able to sleep after that." Caitlin comments, smiling lightly at him. He doesn't answer. "What's wrong?" She asks.

He takes a deep breath. "What if we told each other one at time?"

"Told each other what?" She asks, cautiously curious.

"You know." He says softly. "There are things you don't want to say about what happened with Zoom. Things I haven't wanted to say about what happened in the speed force. What if we just go one thing at a time?"

"I can do that." Caitlin says, smiling softly at him.

Barry pours them both a cup of coffee and walks with her to living room couch. They sit facing each other and take a sip of their coffee, taking deep breaths and looking at each other.

Caitlin realizes he wants her to go first. She looks down, takes another breath, and looks up. "Zoom undid my cuffs the first day I was there. I thought I figured out how to get out of there, but when I got Killer Frost out of her cell, she tried to kill me." Barry tightens his jaw at this. "Zoom saved me. He told me he'd kill the man in the iron mask if I tried again." Caitlin nods indicating that was the end of that 'thing'.

"When I was in the speed force, I woke up in my house. The one I grew up in. I saw Joe looking at the crime scene in our dining room. That's how the speed force talked to me. As people I care about." Barry sighs and chuckles. "When I first woke up there...I thought I was dead. And part of me...felt a weight lifted." Barry looks away guiltily.

Caitlin reaches over and pulls his face back to her. "Don't feel bad about that. You've been carrying the world your entire life, Barry. It's completely understandable that you felt relieved."

Barry smiles weakly and nods. His turn was done.

Caitlin realizes and breathes again. "When I asked Zoom why he took me and kept me...he, uh...he said that it was because he loved me. And that once I accepted who I really was I would feel the same way."

"Who you really are?" Barry asks.

Caitlin nods, closing her eyes. This is the one thing she's always scared to talk to Barry about. "He called me...he told me that there was a darkness in me. That I killed Atom Smasher and Sand Demon. He...he called me the Reverse Flash's daughter."

Barry leans back, taking a deep breath, understanding why she was starting to stutter. "Bad things happen. It isn't anyone's fault. As for you being...you're not his daughter. He is not your family. We are."

Caitlin nods, noting that Barry got especially angry at this mention, wondering how he'll take the other mentions of her being anything like Thawne.

"The second person I saw in the speed force was my dad." Barry starts. "He, uh...made me admit that I wasn't at peace with my decision to not save my mom."

Caitlin nods, not surprised at all by this revelation.

"He said that I was rejecting my powers by not accepting my mom's death. I wasn't accepting my role."

Caitlin looks at him, a little baffled by what he was told. She really didn't like the idea of Barry being a pawn in the game of some all-powerful force. He nods.

"After Zoom told me you died, he gave me a piece of your suit and emblem. And Barry...I. I couldn't breathe. I couldn't speak. Everything just stopped. He kept saying that I was almost ready. That I would understand once I was. I felt like he was trying to break me and the more I fought back against it, the more it worked."

"You didn't break though." Barry reminds her.

"I almost did, Bar. The night after the murders...he took me to one of the scenes...the woman was torn apart. She looked like she'd been mauled. She was lying in her own living room." Caitlin's voice becomes thick. Barry can hear it shaking. "Her kids were watching us talk through the upstairs rails. I just thought of you and your mom and I-I tried," she gasps for air, "I tried to clean her up. Cover her up. Anything to keep them from seeing that when they came down, but he ran me away before I could." A tear falls down her cheek. Her voice still shaky. "He showed me the evidence board you have in your lab....he said I'd be on those kids' board. They saw me the night their mom was murdered. He said it would make sense. That if they looked at my background, it would make sense that I killed her."

"Referring to Thawne."

Caitlin nods. "Could he really see him in me that much?"

"No." Barry lightly scolds. "No, he just wanted to. If he saw that in you, then he had reason to believe you might ever join him. But it's not there, Cait. You are not him. He only saw what he wanted to see."

"Are you sure that's not all you're seeing?" Caitlin hesitantly asks.

"Positive." Barry assures her, reaching across for her hands. "Because I fell in love with you long before I knew who Thawne was." He takes a deep breath, debating on telling her this next part.

"Cait, when we first suspected Wells...I'll admit, I questioned you. Not because of anything you had done, but simply because you were so close to him. Every single thing you did proved me wrong. Everything you said, every person you helped me save, every look you gave me...I knew. Hypothetically...yeah. It makes sense that you might have worked with him or turned out like him. Realistically though? You've never done anything to make me question whether you're a good person or not. And you never did anything to make me think you would side with him.

"A dark past, or dark influences don't make you bad." He assures her, kissing her hands.

She smiles. "Your turn."

"I saw my mom." He says quickly to get it out. Caitlin's eyes widen and she scoots closer to him. "I mean, it was the speed force, but it looked like my mom. Talked like her." Barry breaks a small smile. "She said she was proud of me. That she wouldn't have wanted me to give up my life for hers." His voice is shaky. "That she loved me." He chokes. "God, Cait, you have no idea how badly I needed to hear that from her. Just one more time. Just to hear it. In her voice."

Caitlin smiles and scoots over to Barry, pulling him into her arms. He hugs her tightly, burying his face into her shoulder. After a while he pulls back and looks at her, telling her to go ahead.

"He sedated me." Barry cringes at this, tightening up from his previously relaxed posture. "I'm not sure for how long, but when I woke up, it was all starting. The fights. One night when I was sitting on your desk watching, he sat with me. Talked to me like it was our plan. And...I was just so amazed at how convinced he seemed to be that I would go with him." She takes a deep breath. "He took me to the roof and showed me the cops preparing. Said everyone is a fighter. There is no peace. Just which side you're on. Then he told me I had a choice. That's when he let me go."

Barry nods. "I thought when I got out of the speed force that the good caught up. I was faster. More sure. More confident. Then the metapocalypse happened and I felt helpless again. Then we figure something out and I'm just waiting for the next thing to hit us. It's just never enough."

Caitlin puts her hand on his cheek and looks under his head to catch his eyes. "I told you once, Barry, that if you keep thinking it's your fault just because you weren't fast enough, then you never will be. We can do what we can. That's it. If the world burns, it's not our fault that we couldn't stop it."

Caitlin's eyes leave Barry's when she sees a streak of blue lightning race through the room, gone as quick as it was there. Barry feels her body tense and her hand shake against his cheek. He grabs her hand and moves toward her, pulling her hands to his chest.

"Doesn't mean we don't try." Barry says, looking intensely at her. "There is a chance for peace."