A/N: Hey guys! Here's part four!

"Sorry I'm late, Ralph wanted to – what happened?"

Cisco ran over to where Barry was crouched on the floor, looking worriedly at Nora. Ralph was in the doorway behind him, taking in the scene.

"I want to know that too," Iris said.

"I had to knock her out, because she was starting to adjust to the revised timeline." Barry looked at Cisco, who nodded his understanding as he grabbed Nora's arms. They brought her to a bed in the med-bay, and Barry turned to look at them and explain. "We went to the future to see how much Nora's being here has changed things." He bolted upright in a horrified rush. "Caitlin's still there."

"You brought Caitlin?" Ralph asked.

"More importantly, you left her there?" Cisco demanded.

"Not for long," Barry said, and ran down to the speed lab. He pushed himself forward, mentally kicking himself. He'd been so caught up in keeping Nora safe he hadn't been thinking of anything else. It had been at least fifteen minutes since he left Caitlin to go look for Nora. What if their children had come back in that time?

He didn't stop when he hit the street in 2049, running to the apartment building where they'd met Kristin and Henry. "Caitlin!" Barry called as he approached. He turned as he stopped, eyes searching the empty street. "Caitlin!" he called again, a bit more urgently.

"Barry!"

He whirled at her voice, and saw her coming out from the side of an apartment building across the street. He was at her side in an instant, wrapping his arms around her. His heart had jumped up and down so much in the last thirty minutes… "Caitlin, I'm so sorry."

"It's okay."

He let her go and looked at her. "Let's go home."

She nodded and let him pick her up. He thought she was holding onto him a little tighter than she had on their way to 2049. Hot shame flooded through him, as he realized she must have felt abandoned. He kept his hold on her tight as he approached their time, determined to make it up to her as soon as they got back.

Caitlin was surprised when Cisco walked right up and hugged her, after Barry set her down. "Hey," she said, patting his back.

"You okay?" he asked.

"Fine," she said absently. Her eyes went to Nora, lying on the bed, and she looked at Barry. "Timeline?"

"Hoping we got back here in time," he confirmed. "That's the only reason I left you, I promise."

"She's your daughter. I get it."

He must have noticed that there was something different in her tone. She guessed she wasn't doing a very good job hiding her shock, but she didn't care at the moment. Barry was looking at her funny, trying to figure out what was wrong, most likely.

"What did you guys see there?" Ralph asked.

Barry had a hand to his head. "Our kids."

He proceeded to explain that Iris was pregnant, Nora's reason for coming back in time, and their meeting with Henry and Kristin. Caitlin let him say everything, dropping to the background and only half-listening. Her thoughts were on the part Barry didn't know had happened. The part right after he'd gone to find Nora.

"Wait!" Caitlin cried, as Henry ran off. She heard wind rushing and turned to see Barry racing in the opposite direction, after Nora. She looked back in the direction Henry and Kristin had gone. "Come back!"

As much as she wanted them to stay away, since they seemed to hate Barry, she felt she needed answers. Were they working with Thawne because of some change Nora had made, or had Nora been right, and they'd been working with him all along? Rationally, she knew they wouldn't know what the original versions of themselves had been like. But a stronger, irrational part of her wanted to talk to them. To Kristin, specifically.

She was surprised when she heard a static crackle, and Henry and Kristin appeared in front of her again. She started to take a step backwards but forced herself to stand tall.

"Kristin said you didn't want Nora to use her lightning. I should thank you for trying," Henry said. Kristin touched his arm and he let her down, looking at Caitlin. "You called?"

"Yes. I, uh…"

Kristin was looking at her with a slightly amused expression. "This is as weird for you as it is for me, isn't it? Thawne didn't think Flash would bring anyone with him except Nora."

Caitlin found she could focus again. "I need answers. Why are you working with Thawne?"

"You're definitely curious about that, but that's not what you really want to know," Henry said, studying her. "Kristin gets her ability to hide her emotions from you. I know how to read her, though. Which means I can read you. You want to know about your future."

Caitlin stared at him levelly. "I want to know why any future family of mine would try to hurt the family I have now."

"Different age, same Mom," Kristin said. "You know better than anyone that family's more than blood. It's the people who are there for you."

"They're the same thing for you. Barry and Iris. Me."

Henry had a familiar, stubborn set to his jaw. "My parents weren't there for me."

"Because of Thawne!"

"Thawne raised me!" Henry retorted, a spark of anger in his eyes.

Kristin calmed him with a touch. Caitlin could see that they really loved each other. She tried memorizing everything they'd said so far, knowing it would help when Barry got her and they went back in time. She had a feeling if she pressed too much, they would just leave, and wouldn't come back again.

Kristin was looking at Caitlin curiously, almost as if she wanted something from her but wasn't sure what it was.

"You sure you know Flash as well as you think?" Henry asked, looking in the direction Barry had gone. "I can feel the Speed Force opening. And now it's closing. Looks like Dad's running home."

He had to be bluffing. There was no way he could tell if Barry was time-travelling. There was no way Barry would leave her here. Though it had been a few minutes.

"Your powers," Caitlin said, looking at Kristin again. "You don't have a Khione? Another personality?"

"Just the ice."

"She's got the attitude of Frost already," Henry said jokingly.

Kristin couldn't seem to keep herself from saying whatever was on her mind, because she lowered her voice and said in a rush, "Mom, when you get back… keep Dad close, okay?"

Caitlin stepped closer to Kristin. "Keep who close?" she asked, trying not to show how desperately she wanted to know.

"Kristin, he's already been gone for a few years from her time," Henry said quietly. "I thought you knew that."

Kristin had her mouth open. "I thought it was right after she found out…"

"Who?" Caitlin asked again.

Kristin looked at Henry, who nodded reluctantly. "Ronnie Raymond. I thought he was still alive in your time."

The ground seemed to start spinning as his name kept playing over in her head. Kristin actually put a hand to her arm to steady her. Caitlin looked at her daughter searchingly. "Ho-how is he…?"

"We've already said more than we should have. Thawne said not to talk too long."

Henry did seem a bit apologetic as he said this, but Caitlin didn't notice. She was too busy comparing Kristin to Ronnie, wondering how it was possible.

"We should go," Henry said gently.

Kristin smiled at her. "Bye Mom."

Then Henry scooped Kristin into his arms again, and they left in a burst of blue and yellow light.

Caitlin moved without realizing it, in the direction they went. She realized she was leaning against a wall across the street when Barry's voice called her focus. She shook her head and started walking back to the street, struggling to stay in the present moment as her thoughts were pulled back to Ronnie, and forward, to Kristin and Henry. She clung to Barry a little harder than necessary, hoping the physical contact would anchor her as he brought her back home.

"… so I brought her back here, and you know the rest," Barry was saying.

"You're awfully quiet," Cisco said.

No one spoke, and Caitlin looked up, blinking. She hadn't been paying enough attention, and now they for sure thought something was wrong. They were looking at her, Cisco questioningly. He stepped closer to her with his arms crossed. "That took you a few seconds too long to notice. What's got you so lost in thought?"

"Something Henry said," Caitlin lied. "He came back after Barry went to get Nora, and he told me Thawne was his family."

It wasn't the part that was dominating her thoughts, but it was definitely in the back of her mind, so she didn't feel too bad about the lie. She could see that they needed more, though, so she told them how, according to Henry, Thawne had raised he and Nora, instead of Barry and Iris.

Iris looked to Barry, whose face was devoid of expression. "Henry said Thawne taught him everything."

Cisco was still studying Caitlin a little too closely for her to be comfortable, so she made an extra effort to be present and engaged. She could sort things out on her own time. "Do you think Nora will be out long?"

"She should come out of it anytime now," Iris said. "Barry only gave her a small dose."

Caitlin nodded, walking over to look at Nora. The girl really was a good mix of both of her parents. Caitlin knew that Henry would be as well, having seen him herself. For him to hate Barry so strongly… a terrible thought occurred to her, and she kept it to herself. She would ask Nora when she woke up, if it didn't come up.

She didn't want to make anyone more anxious than they already were.

"She's waking up."

Barry walked back into the med-bay at Caitlin's voice, and saw Iris start hurrying over as well. Cisco and Ralph came from the other side of the room. Nora stirred as they reached her, pushing herself upright.

"Nora?" Iris asked. "Are you okay?"

"I've got a major headache, but yeah." She looked at Barry, and the last of his apprehension faded. Her expression was normal. It was slightly questioning, actually, as she looked to him for an explanation. Which meant she still trusted him. "What happened?"

"You started adjusting to the timeline. Whatever life you lived before is different than what happens from here, apparently."

Nora was shaking her head. "Everything got so jumbled. I was seeing things that didn't happen, but they felt so real… I really did change things."

Barry knew she was beating herself up over it. Hopefully figuring out how to fix it made her feel better. "We've still got time to fix things. You just need to tell us everything that started to change."

"Everything?"

Iris nodded. "Barry's right. We'll work with what we know, and fill in the rest."

"It was mostly Thawne. Teaching me how to run. Writing on a white board while Henry, Kristin, and I took notes. Taking us on patrols of the city."

"Nora, when you went into the house without us," Caitlin started, "did things look the same?"

Nora looked at her guiltily. "No."

"Did you see Iris?" Barry asked.

"Mom wasn't there. When I went into our house, there was a stranger living there. I don't know what happened exactly, but from that rush of memories, Thawne really did raise Henry and I."

Iris's hand went to her stomach as she turned partly away, and Barry moved so he was brushing against her. "He won't touch you," he said in a low voice. "Either of you," he added, placing his hand over hers where it rested on her belly.

Nora stood. "I wish I knew more, but it was so fast that I didn't get much I can explain. Just a feeling. Like he's family, and we don't have much of that." Nora walked over to them, looking at Iris with emotional eyes. "Mom, you know I know that's not true, right?"

"Of course I do," Iris said, hugging her briefly.

"So Thawne hijacked your family in the future," Cisco said. The words sounded harsh, but his tone was careful. "He trapped Barry in some way, and Iris is… somewhere, probably. Maybe locked away somewhere, maybe… not." He cleared his throat, and Barry shoved the awful thought away. "No wonder they hate you," Cisco said, looking at Barry. "Thawne has a grudge against you that we still don't completely understand. If he raised your kids, he probably instilled that grudge in them too."

"That doesn't help us, though," Ralph said. "We need to know what changed to give this Thawne guy the edge over Barry."

"It's gotta be something that's already started," Cisco reasoned.

"Like me being pregnant?" Iris asked.

"Right. Forgot about that for a second."

Nora was pacing. "The only things I know for sure are that Mom's pregnant early and it's a different Cicada now than it was in the past."

Barry froze. Could it be that simple? He could see the others thinking quickly, their expressions distant as they did. Iris was still focused on Henry, from the worry in her eyes. Caitlin seemed to have an idea, though, and when Barry looked at her, he realized she was thinking the same thing. Maybe it was that simple.

"Thawne knew that helping me with the satellite would result in Henry being born a year early," he said, looking at Nora. "The only reason Henry was originally born later was because of the recovery time I needed. Even he couldn't have guessed that the trajectory of the satellite pieces would make a different Cicada, though. You said we never beat Cicada before."

"So if we beat him now -," Nora started.

"We'll be able to focus on whatever else comes our way," Barry finished. "What if there's not one single moment Thawne has an advantage? What if he wins because we're distracted by starting a family and fighting Cicada for years, along with all the other threats?"

"We know from the past that Thawne likes keeping us busy until the final fight," Cisco said.

Barry remembered the particle accelerator almost starting up again, and nodded.

"So making you start a family while Cicada's still new keeps us even busier than we originally were, giving him the edge he needs to capture Barry sooner," Caitlin said.

"Different Cicada means we might have more of a chance of beating him," Ralph said. "Thawne might not know that."

Barry could see that Iris's thoughts were back on the present, and there was a steely look in her eyes. "Then we need to put everything we have into capturing Cicada."

"In other words, go back to what we've been trying to do for weeks," Cisco said.

"No," Caitlin said, fixing a determined gaze at them. "This time we actually catch him."

A/N: What do you think?

I don't know how long the next part will be, but it will wrap things up (whether or not that means the timeline is restored remains to be seen... hahaha). I was debating who Kristin's dad would be for a while before I wrote this, which is part of why it took me longer. Let me know what you thought of the reveals in this part!