A/N: Hey guys. This is the first chapter of my Flash and Agents of S.H.I.E.L.D. crossover. It takes place completely in the S.H.I.E.L.D. universe, starting after the first few episodes of season three. I've been working on it for a while now, and hope you like it. Please let me know what you think.

"There's a video surfacing all over," Daisy said. "Some yellow blur racing over the screen."

"You think it's real?" Coulson asked.

"I think it's worth checking out. Could be another Inhuman."

Coulson looked at her before nodding. "We don't have anything pressing with the ATCU right now, and Lash has been quiet. Find the source, see where they are. Once you have a location, we'll go in."

Fitz watched him walk out. "I'm guessing you want some help?" he asked.

Daisy seemed surprised when he spoke. "If you don't mind, yeah. But if Simmons needs you -."

"She'll help too," Fitz said. Daisy seemed hesitant at the idea, but he told her they would start working on it right away and she didn't argue. The others may think Jemma needed more time before fully returning to the team. Fitz knew Jemma needed just the opposite. Helping Daisy with that phone call had made her feel like part of the team again, for a few brief moments. Maybe working a simple retrieval mission would be the thing that made the difference for everyone, convincing the others she was fully back and, more importantly, convincing Jemma beyond a doubt that she was too.

He left the lab and walked to her room, knocking lightly on the door.

"Come in," Jemma said.

Fitz opened the door and peeked inside. Jemma sat cross-legged on her bed, holding a mug of tea and looking at a tablet in her lap. "I was hoping to see you soon," she said, her face brightening when he stepped into the room. "I've been looking over the Inhuman cases I missed. I'm a bit surprised none of them wanted to stay to master their abilities. Daisy's made a detailed plan for them."

"Funny you should mention Inhumans." She set the tablet down and turned her full attention on him. "Daisy found a new Inhuman," he said. "Well, she found videos that suggest there's a new one. She could use a bit of help actually identifying the person. I thought we could do it together."

There was a shadow of hesitation in her expression as she prepared to answer him. "She wants me to help too?"

He spoke gently. "Daisy's focused on finding this Inhuman. But I know it'll be a faster process if the three of us work together."

"Yes, that makes sense," she said, moving her legs to hang over the bed. "So we're going to the lab?"

"For now," he said. "I thought we might go with Daisy to pick up the Inhuman."

She stood and walked over to him. "Why would we go?"

He took her hand, warm from holding the tablet. "It's just a retrieval mission. I think that's a great opportunity to get back into the field. For both of us," he clarified. He hadn't exactly been on many missions either.

He could feel the hesitation in her body, her uncertainty in her own ability adding a stiffness to her movements that hadn't been there before Maveth. She didn't cling to his hand like she had the first week, though. It had been three weeks since then, and this hesitation was the only lingering reminder of those six months they'd been apart. That, along with the slightly awkward way they interacted whenever Will came up.

"I think it's a good idea," she said, just before they reached the lab. She met his eyes with a tentative upturn of her lips. "Thank you."

"We haven't done anything yet," he reminded her. "We've got an Inhuman to find."

0-0

It took them a few hours, but once Daisy identified the location, Fitz and Simmons ran a search and found the likely individual. Barry Allen was a CSI in Central City. He'd missed work for a week recently, and had a report filed by a Captain Singh for the unplanned leave of absence. The report had been deleted, so the search Fitz-Simmons ran only revealed that one had been made, but Daisy managed to bring up the original. Once they saw the timeline, Daisy was convinced.

"I'm gonna head out right away," she said. "Thanks for the assist."

"Wait!" Jemma and Fitz said at the same time. Daisy stopped in surprise and turned back to them.

"We're going with you," Fitz said.

Daisy looked like she wanted to tell them to stay behind, but Fitz shot her a quick look that said please, this is for Jemma. Daisy would never be able to read his looks as well as Jemma, but she seemed to understand. "Okay. Let's go."

They took the plane and arrived in Central City a few hours later. The first place they checked was the Police Department where Barry Allen worked, and they weren't really surprised when he wasn't there. The second place they checked was more reasonable. Daisy had found a name on the deleted report. Apparently, Barry Allen consulted with some of the workers at S.T.A.R. Labs. The report had stated that Barry wasn't at that work either.

They walked up to a desk in the welcome area, and Fitz noticed a picture of a happy looking couple on the wall behind it. Tess Morgan and Harrison Wells, a plaque underneath it read. Founders of S.T.A.R. Laboratories.

It was the woman in the picture who greeted them when they got off the elevator at the appropriate floor. Tess Morgan didn't look any different from her picture, and smiled at them. "Hello, and welcome to S.T.A.R. Labs," she said once they were clear of the elevator. "My secretary said you were looking for Barry Allen?"

"Yes, we were told he consults here," Jemma said. "We have a few questions for him."

"Let me take you to the scientists he works with," Tess said, leading them down a hallway. "We don't have a lot of scientists here, but Barry works with our very best. My husband and I are very fond of them."

Fitz was impressed with the facility. Everything was neat, and the internal structure was very efficient in terms of space. There were a few design choices he wouldn't have thought looked promising on paper, but worked both stylistically and functionally in reality. He memorized some of them as they walked. It was always helpful to have design options in mind, in case he needed to build something substantial.

Tess led them to an open area filled with tables and desks. This looked more like the lab Fitz had expected. One of the two desks was cluttered and strewn with diagrams and schematics. The other was covered in books and supplies, but in a more organized fashion. Two people stood in the room, talking over a clear dry-erase board. The man seemed like he was laughing. The woman had a much more reserved expression as she looked at the formulas they'd written out on a second board.

Tess knocked lightly on the door, and the two stopped and looked at them.

"Tess, what's up?" the man asked. He had long dark hair that was loose around his face. Fitz was slightly amused by his graphic tee shirt.

"These people were looking for Barry," Tess said. "I told them you could help them out."

"Thank you," Jemma said as Tess went to leave.

Tess smiled at her. "If you'd like to come by another time, I can give you a tour of the facility. I couldn't help but notice your eagerness on the way here."

"That would be nice," Fitz said with a dip of his head, as Jemma nodded. Tess cast them a final smile before walking away, and then Fitz looked back in the room, following Daisy inside.

"Do you know Barry?" the woman asked.

"No," Fitz said, "but we'd like to."

"We have a few questions for you," Daisy said.

"Have you had any fish oil recently?" Fitz asked bluntly.

The man grinned. "Oh, that's a great accent."

Fitz blinked and moved on. "Have you?"

"Oh, no," the man said. The woman shook her head too, her eyebrows raised. "Barry takes some once in a while…" the man continued.

"Have you seen Barry recently?" Jemma asked.

The man seemed somewhat happy to hear that she had an accent as well (honestly, it wasn't that uncommon), though he didn't grin like he had before. He seemed like he was thinking fast – as if deciding how much to tell them.

"We want to help him," Daisy said. She looked around and stepped closer, lowering her voice. "Let me show you something."

Fitz caught Jemma's eye and nodded minutely, focusing on the man's face while she focused on the woman's. He watched for signs of shock or fear as Daisy gave a quick demonstration of her powers. The man seemed surprised, but there wasn't the shock there that he would expect if the man had never seen an Inhuman in person. A quick glance at Jemma told him the woman hadn't been too shocked either.

"I'm an Inhuman," Daisy said quietly, "and I think Barry is too."

"But you knew that," Fitz said.

"I don't know what you're talking about," the man lied. Badly. Fitz wondered if that was how he sounded in a lie. He certainly hoped not.

"Why do you want to see him?" the woman asked. Fitz studied her and saw something familiar in her sharp gaze. He knew she would be a much better liar than her friend, even without hearing her tell one. It was clear in her eyes that she could hide things, mainly because he couldn't read her. "What do you want with him?"

"We want to help him learn to use his abilities, so he isn't a danger to himself or anyone else," Jemma said. "We have a safe place for Inhumans to train."

"I bet you do," the man said suspiciously. "Some sort of secret government lab? We go in willingly and then we're prisoners?"

"Of course not," Daisy said. "But there's another group who would just take Barry, no questions asked. And they're not very nice. Look, can we just meet with him?"

The man looked at the woman. She looked at the three of them and pulled out her phone. "Barry," she said, "meet us in the parking lot."

The man walked out first, the woman a step behind him. Fitz hurried after them, with a quick look at Jemma. It seemed she didn't know quite what to make of the two scientists either.

"You had him on the phone the whole time," Daisy said with a trace of a smile, as they rode the elevator. "I respect that."

"Well there's not much point in making you explain twice," the man said as they disembarked. He waved at the secretary behind the main desk before walking through the sliding door that led outside.

"So how long until he gets here?" Fitz asked when they stood in the parking lot next to the lab. Well, he started to ask it. The end of the question kind of trailed off as a yellow blur appeared, rushing by him. The air filled with a crackling sound, and suddenly there was a man on the ground behind them.

"Ow," he said, standing. He was taller than the other man, with brown hair.

"Super speed?" Jemma asked.

Of course. Barry walked to stand between his friends. "Guess I didn't hide it very well," he said good-naturedly.

"You didn't hide it at all," the woman said with a frown.

"It's okay, Cait." He looked at them. "I heard what you said. You know I just got these powers. I'm guessing you know why?"

Daisy nodded.

"And you've helped others?"

"I've been doing this since Inhumans started emerging from cocoons a few months ago. I can help you learn to control your speed if you come with us."

Barry studied them in the same way they were studying him. "Alright," he said after a minute. "I'll go."

"Barry, what -," the woman said, turning to him. Fitz saw something in her guarded expression, for a second. Alarm. She didn't trust them.

"It's okay," he said, his expression completely open. "I'll be fine."

"We're coming with you."

"I don't think -."

Jemma cut off, as did Barry. They'd spoken in unison. Something shifted in Fitz's chest, and he felt his gaze harden as he looked at Barry.

"It shouldn't be a problem for all of you to come," Daisy said. "You can trust us. If seeing our facility helps you do that…"

"Then let's go," Barry said.

"We need to tell work," the woman said.

There was another crackle in the air, and Barry disappeared in a yellow blur. He came back less than a minute later, once again stumbling and falling to the ground. He got up quickly, and Fitz noticed he had a bloody scrape on his cheek. "I put in notes for all of us. We're on vacation."

"You're bleeding," Jemma said, stepping forward.

Barry touched his cheek. "It doesn't hurt. Just a little road rash."

The woman had already taken a bandage from her purse, and held it out to him. Once he'd put it on his cheek Daisy turned to them. "Let's get to the plane."

"Plane?" the man asked.

"We have to get back to the Playground somehow."

0-0

It was only when they were on the plane with the doors sealed that they spoke again. "So who are you?" Barry asked.

Daisy frowned. "Sorry about that. I'm Daisy."

"Barry," Barry said. "But you all know my name already."

"Dr. Caitlin Snow," the woman said quickly.

Jemma perked up. She'd had her suspicions when the woman pulled out a bandage so quickly. "Wonderful, a doctor! Not that not being one means anything less. Well, it does mean a little bit less, what with the required schooling and degrees, but other than that it's just a title. I think it's nice…" she trailed off, her face feeling quite warm. They'd been with the people for all of five minutes before she became a fast-talking, rambling idiot. Talking about PhD's, ironically.

"Dr. Jemma Simmons," Jemma said in a slower voice, extending her hand with a tight smile.

Dr. Snow smiled nervously.

"I'm Fitz," Fitz said awkwardly.

"Cisco Ramon," the man with long dark hair said.

Daisy moved towards the cockpit. "I'm gonna get us in the air."

"Why don't we sit?" Jemma asked, gesturing at the chairs all around them. "We've got a few hours," she prompted when no one moved.

Cisco plopped onto a chair and nodded. "Okay, this is pretty sweet."

Jemma sat down across from him as the others filled in the oval of furniture. She and Fitz shared the couch while the newcomers occupied the lounge chairs.

"So," Jemma said, looking between the three of them. "What do you know about Inhumans?"