Disclaimer: I do not own the characters featured on the show Castle, they belong to the creator of the show, ABC and the others who do own them.

A/N #1: Really pleased receiving the feedback I did for the last chapter, so I'll go ahead and get started on my thank yous for that! TORONTOSUN (Very nice that you're still liking how everyone's working well with the investigations. And I did hope someone would notice that Skye joined in with Castle and Beckett saying something at the same time, lol, so I was really happy that you did. And that you thought it was perfect too, that was great to see!) and

Mb (Really glad you found the first half of the chapter interesting with their vic being drugged and killed with the plane being remotely controlled. Not surprised you're wondering about the killer's motive with the parts, it'll be answered I promise, lol. I also wasn't surprised that you mentioned the other alphabet agencies coming in to help, or as you said hinder, lol, yeah, you'll have to see about that and if there are more clues! You're welcome for the first half of the chapter! I was glad you thought the second half of the chapter was nice with them going home for lunch, I figured it needed to happen, lol, after what happened in the first half. And yeah, better to talk about fun stuff like plans for trips and the holidays too to get their minds off of the case. And you'll have to see about that article of course, but I'm not surprised you're wondering about it since I ended the chapter there! You're welcome for the second half of the chapter!).

Thanks for the reviews, I loved reading them and am grateful for the time taken to write them out and send them my way!

A/N #2: The title of this chapter is a lyric from the song Dead Man's Party written by Danny Elfman, from the Oingo Boingo album the same name as the song.

Of What You Can't See

Watching the officers gathering with the FBI and NTSB in front of Brad's office, Beckett glanced at her husband when he stepped up to her. "What?" she asked, a little taken aback by the expression on his face.

"What do you want to bet we're going home," Castle said in response.

"I knew that already," Beckett said simply. She then turned her head slightly to him and said, "Did you take a picture?"

"Several," Castle answered.

"Good," Darnley said. When they looked at him, he said, "You didn't think I'd realize?"

"Oh, I did," Castle replied. "Did Brad talk to you?"

"It's why I'm still here," Darnley answered with a quick nod before they were turning their attention to Brad and Aspinall.

"Alright, I had you all come here to update everyone," the agent said.

While Aspinall was explaining the plane crashes Castle murmured to his wife and Darnley, "Can the officers really investigate this too?"

"They can," the carpenter said first. "Just… as a backup to the FBI."

"You have?" Beckett asked since Aspinall and Brad were letting Nkosi speak.

"A couple times," Darnley said with a brief nod. "Though never with the NTSB," he added quickly before his husband was speaking.

"We believe Riverside Forging Limited is where our investigation begins," Nkosi was beginning to say. "The counterfeit parts were left there."

"It was initially speculated that the parts were stolen, tampered with and then returned to Riverside," Skye took up when her co-IIC turned to her. "But after looking at the parts themselves we have determined that they were handmade."

"Is that even possible?" Castle couldn't help asking.

"If they have a mold," Skye said, looking back at the three. She then turned to the others and said, "And that's where our investigation will be going next. That kind of mold won't be something available to everyone but there will be a number of sellers."

"Think we can look into that?" Castle asked his wife.

"Not at home," Beckett said.

"But there are other things we can look into," Darnley said. "Assuming I can head to your guys' house."

"If you want to," Beckett said. She looked over at the others seeing they were dispersing, and she said under her breath, "Here it comes."

"I don't have to say anything do I?" Brad said, approaching with Skye and Darnley.

"Not really," Beckett said.

"But I want you three to keep investigating," Brad told them firmly. "We could always get something from another angle," he added.

"We were planning on it," Castle assured his friend. He was startled when Skye was giving his wife a USB stick and said, "Yours?"

"We need to look at both," Skye explained. "And that means you will too," not surprised when Beckett was quick to respond.

"We'll look into both cases," she assured the investigator.

"Call if you get anything," Brad said.

After they'd promised the three they would, Castle, Beckett and Darnley quickly left before Aspinall or one of the other agents noticed them still there. They went to the car and made their way back home before the carpenter was clearing his throat.

"Did you want to go back to your house?" Castle asked, looking at his watch since his wife was driving.

"No, I'm just wondering about you two looking into the crashes," Darnley said.

"That means you have," Beckett said, pulling up to the driveway and opening the gate.

"I have," Darnley said. "To help Trev when he was having some issues," he added. "Basically what we're doing now. But if you're not used to it then it's a little jarring."

Waiting to answer, Beckett pulled into the garage before she turned to her friend and said, "We met Skye for the first time at the site of a plane crash and were nearly in another."

"I just want to make sure," Darnley replied. "It can be brutal."

"We know," Castle said after he and Beckett had shared a glance.

"Then we better get started," Darnley replied with a brief nod before they were getting out of the car. "What're you going to tell your family?"

"You mean Mary and Alexis," Beckett said pointedly, taking off her coat. "And we'll tell them the truth."

"What truth?" a voice said from the door into the hall.

"Did Skye get in touch with you?" Beckett asked.

"She did, I'd help you three, but she told me not to," Mary said.

"So that means there's four of us, right?" Darnley asked.

"Yes," Mary said firmly.

"You might want to explain that to her," Darnley said, though he was startled when the doctor was handing her phone suddenly to Beckett.

"She told her," she commented after reading the conversation. "But Mary insisted she could make things go a lot faster."

"Then we should start," Castle said carefully, watching his wife.

"He's right," Beckett replied, handing Mary back her phone before they went inside.

"Did you tell Alexis we were coming back?" Castle asked.

"She saw my reaction to Skye's message," Mary said. "But she said she can keep an eye on Josie if you're worried." Studying the writer she told him, "She can you know. She'd also like to."

Squeezing her husband's arm a little firmly, Beckett said, "I'm not surprised. But we're just going through everything at least once."

"She wasn't surprised when I told her," Mary said, watching the three setting their coats in the closet. "And she said she'd be fine with Josie for however long was needed."

"Are our parents here?" Castle asked.

Shaking her head Mary said, "They're still with Bethany and Joseph," holding up her hand before Darnley could respond. "They picked up Keo and Maddy and went back to join them."

"Well… at least there's that," the carpenter said slowly. He shook his head and said, "I guess we can start."

"Mama!" Josie suddenly squealed, leaving the game room and starting to run to them.

"Don't run sweetie," Beckett said immediately as she walked over to her.

"I turned for a second and she was out the door," Alexis said, stepping into the hallway herself.

"It's okay, she obviously heard us," Castle said, going to her.

"I'm fine Dad, I've been resting," Alexis told him firmly. After she'd shared a hug with him, she said, "And I'm ready to walk around a little."

"Will you stay with your sister?" Castle asked after he'd taken Josie from his wife.

"I have to?" the toddler asked. When her parents both nodded, she looked at her big sister and said, "We can play?"

"I was hoping you'd want to," Alexis said with a smile.

Castle was soon smiling himself when Josie began to giggle, and he kissed her temple before he set her down. "We'll probably be staying until the girls are back," he told his and Beckett's oldest before she was responding immediately.

"I had a feeling but if it helps you with the case then you should," Alexis said. Seeing the way her parents were looking at her she explained, "Jules and Lizzy?"

"Then we're going now," Castle said.

"Come on Josa," Alexis told her sister. "You want to try the skeeball right?"

"Eh," Josie said happily.

"If you're letting her walk up the ramp have her take off her slippers," Beckett said.

"You let her cheat?" Darnley asked as Alexis laughed and walked back in the game room with her sister.

"He does," Beckett said.

"Don't worry," Castle said, following them into his and his wife's office. "She makes sure to tell Josie that she can't do that at an arcade or anything."

"Hopefully that works," Mary said with a brief smile. "So… what's first?"

"A timeline," Beckett said, nodding to her husband's look. She watched him going to one of the cabinets in the built ins and after he'd pulled out a whiteboard, she told the other two, "For our stories sometimes."

"Usually to work out the plots," Castle said, propping it against some of the bookshelves. "In this case the timeline of everything."

"First is… the USB," Darnley said when he recalled Mary wouldn't be aware.

"She gave this to me while we were leaving," Beckett told the doctor.

"Was Aspinall there?" Mary asked. At the nods that all three were giving her she smiled slightly and said, "I'm not surprised. Better get it set or your timeline isn't going to work."

"Yeah, right away," Castle said, watching his wife going to her computer.

"Would you mind getting the information from this?" Beckett asked.

"Me?" Mary said in surprise. At the writer's nod she said, "I can, actually I can help you more doing that with Skye's investigations," not surprised when Castle was responding immediately.

"Then you know the cases… investigations," he said, correcting himself rapidly.

"Very well," Mary said firmly, having placed the USB in the computer and opening what her wife had on it. She then turned around and said, "She changed her theory."

"She did," Beckett said, walking over to the screen.

"Yeah, her initial theory was that someone was manipulating the composition of the parts in factory," Mary said. "And then that they were stolen and brought back but she's saying here they made it."

"We saw a video of it," Darnley said, seeing the other two were nodding.

"That makes it more interesting," Mary said, frowning at the screen. She then turned back to the others and said, "She never had Eris at first."

"Just the plant," Castle said.

"Yeah, which didn't sit well with her," Mary replied.

"One thing I'm confused about is how we get from Riverside to Eris," Darnley said.

"She says here that the parts were tested at Riverside after they were manufactured at Eris," Mary said, reading the screen.

"Does that happen that much?" Beckett asked her.

"Every so often," Mary answered, reading again. "It might be because Eris recently moved here, a probationary period I would guess," she added after a moment. "What is she looking into now?" she asked the others.

"I'm guessing that part," Castle said.

"He's right, she wanted to look and see who would know those parts specifically were going back to Eris," Beckett added. "She said they were tested, returned to Eris and then sent from there to…"

"Airports," Castle supplied for his wife.

"That might take her a while," Mary said with a sigh.

"She told them she'd try to get back for dinner," Darnley said. "Like my husband had just told me."

"So we have the plane crashes," Mary said. "And then we have your case."

"Did Skye explain it to you?" Beckett asked. At the doctor's nod she said, "Then you should know we don't have that much."

"Were you ever able to find out who picked up Miss Garnett?" Mary inquired.

"No, and we looked into everyone around there since there are homes where she was picked up," Castle answered. Seeing the confused expression on the doctor's face, he explained, "The part of the campus where she was at were homes for the students and faculty."

"So any eyewitnesses would be reliable," Mary commented.

"If there had been any other than the boy obsessed with her," Darnley said.

"How's he doing?" Mary asked at the reminder.

"Andrews was released from the hospital this morning into his parents' custody," Beckett answered. "And they told Brad they would look into therapy and if he needs treatment."

Nodding, Mary then said, "And he couldn't give you anything about the person picking her up."

"A height but he said this morning they had been wearing boots… really high heeled boots," Darnley said.

"You've looked into the four CEOs," Mary said. When the three nodded she asked, "There's absolutely nothing there?"

"The only thing was one employee they fired after the move from New Jersey," Castle said. "But that employee died in a motorcycle accident and his family moved to Hawaii."

"And they're still there," Beckett said. "Apparently they had land in Hawaii and that was the plan in the first place."

"First place… was it an attempt at a fraudulent suit?" Mary started to say before realization hit her.

"He was attempting," Castle said. "He hadn't gotten a lawyer yet, but he threatened the CEOs."

"Garrett in particular," Mary stated.

"Yeah, which is weird because there's no one of the four that's higher in rank than the other," Darnley commented.

"Okay, you have the easiest thing," Mary said. "How these two are connected. But the problem is the why."

"That happens a lot in cases," Castle said.

"And you've talked to everyone you could," Mary started to say. "Researched everybody."

"We did," Beckett answered. "And the only thing we had was Andrews and of course he was cleared."

"Then I'm not sure what else you needed to look at," Mary said before she paused. "The crash today."

"I'm surprised Skye didn't have anything there," Castle said.

"And the Report," Mary said, speaking absently while she was reading on the computer again. She paused and then said, "Never mind, I see the notes Skye added here." Glancing over her shoulder she asked Beckett, "She had the time?"

"Aspinall wanted to wait for the agents and the rest of Trevor's go-team to arrive," Darnley said first. "So she was working to update everything."

"And Kipling's story is… missing," Mary said, not surprised at the sighs she heard in response behind her. Turning around she was about to ask about the subject when Castle was answering that already.

"His best friend at the paper knew the story," the writer said. "Or what he was planning to write. It was detailing the move."

"How does that work with him bothering that boy at Mari's school?" Mary asked.

"It doesn't, that was because Mr. Harding, the father of Ryan, is a lawyer and he was doing a story on the real estate deal for some land northeast of here," Darnley said. "Kipling had been tipped that there was something shady going on with that." Glancing at his friend he said, "What?"

"I'm wondering if that was the story though," Beckett said.

"It's been bothering me too," Castle said before he looked at her. "It's too coincidental."

"Did you mention that to Skye before you left?" Mary asked.

"I just thought of it so…" Beckett began before she trailed off.

"If it was dealing with Eris that is a long time to be looking into the company," Mary said, watching her before Darnley spoke slowly.

"I don't think he was," the carpenter said. He sighed and then said, "I wish we could have asked him."

"Did you look into his computers?" Mary asked. "I'm assuming he has more than one."

"He did and they're being looked into now," Castle said.

"Did you see the information we have about him before he disappeared?" Beckett asked the doctor.

Nodding Mary said, "He was claiming to leave for Vegas. But he had no tickets." She paused and with a frown said, "Do you think it was his job or a woman?"

"Could be both," Castle said.

"He thinks it's both," Darnley said.

Studying the carpenter, Mary asked, "You don't think so?"

"I don't know if it's a woman the way Castle is thinking," Darnley said carefully. "That he was doing a story around the woman, I think it was just they were together and the story interfered."

"So you think he was legitimately going to Vegas with the woman," Mary said. After the carpenter nodded, she looked at Beckett and said, "You've been quiet."

"I'm not sure if that has anything to do with why he was killed the way he was," she replied.

"You think it was just a front?" Mary asked, glancing at the writer's husband and seeing he was studying his wife.

"No, there was a story," Beckett said firmly. "But the idea of the trip and a woman is just speculation. No one at the Report, even his friend there, mentioned a woman. And she said he hated Vegas remember."

"But he'd go for the story," Darnley said in a rush.

Shaking her head Beckett told him, "I know that, but he obviously didn't."

"Then you need to hope there's something on his computers," Mary reminded them. "Since he had no notes?"

"If he did, they were with him," Castle replied.

"And there's nothing in his background?" Mary asked.

"As far as we could look into him," Castle said. "And what we knew about him already."

"Then what exactly are you going to do?" Mary said.

"Look at the footage from the house that was across the street from the field," Darnley said.

"You haven't yet?" Mary asked in surprise.

"We did, but now you're helping you should look too," Castle explained.

"Okay," Mary said, turning to face the screen. She found the footage shortly after and watched it, shaking her head and saying, "The street isn't that wide."

"I think it used to be a road," Castle commented.

"You're lucky you were able to get into the house," Mary said. She then went to the video from Riverside and after watching the killer there said, "They didn't get the results from the iron, did they?"

"No, but Skye was calling often," Beckett replied.

Smiling briefly, Mary was about to speak when her phone rang and she rushed to get it out of her pocket before she said with a frown, "It's Brad."

"I think he's calling you," Castle said, looking at his phone to make sure the chief hadn't called him.

Answering Mary said, "Brad I'm-"

Sharing a look with her husband and Darnley at the doctor obviously being interrupted, Beckett turned back to her when she was exclaiming her wife's name. "Mary-" she started to say as she hung up and hurried over to the door.

"Skye collapsed," the doctor replied, shaking her head. "I need to go."

"Yeah, she's about to leave," Castle was saying into his phone, having called Brad as soon as Mary had hung up. "Oh, you are? Okay then we'll keep her here… yeah someone will be here." He hung up quickly and said, "She refused the go to the hospital so he's having Wade bring her here."

"I wanted to intercept them, take her to the hospital," Mary explained when the other three looked at her.

"It doesn't sound like she'd let you do that," Castle said carefully.

Giving him a look, Mary let out a huff before she said, "Alright, but I'm taking care of her," not surprised when Beckett responded first.

"We were hoping you would," she said. "But you know once she's here she'll fill us in if they have anything."

"She wants to close these investigations," Darnley said, not surprised when the doctor was responding angrily.

"I know that! You don't think I realize how much she wants to get everything wrapped up? It's been driving her crazy and I can't do anything to help her," Mary said.

Grabbing the woman's shoulders, Beckett said soothingly, "You have been, you've been doing your best to get her to relax, and she's appreciated that."

"I don't want her to have to go through this anymore," Mary said in a near whisper.

"Of course you don't," Beckett said. "And to be honest the best thing you can do is be there for her like you have been."

"I wouldn't stifle her once she gets here," Darnley couldn't help saying once they were leaving. At the look the doctor gave him he said slowly, "I'll go home?"

"No, but Kate's right," Mary said. "If Skye has anything then she'll want to tell you but I'm going to stay with her."

"Which will help," Castle said. He wasn't surprised when Mary nodded in response and he said, "I'll go let Alexis know."

"And get Josie," the doctor said swiftly. Smiling at Beckett nodding to her husband she said, "I thought you might want to do that."

"Now that we can," Beckett said. "Could I ask you something about the footage you watched?"

"I want to wait for Skye," Mary said firmly before they were looking at Darnley when he was clearing his throat before he spoke.

"Maybe I should leave," the carpenter said. Before anyone could say anything in response to him the chime for the gate sounded and Darnley looked out the window next to the front door. Spotting the cruiser driving down to the house he said, "Okay, maybe after seeing if Skye has anything."

Keeping a hold on Mary's arm while Castle was opening the door, Beckett told the doctor when she turned to her, "She's not going to like you rushing to her."

"I won't," Mary said firmly while her wife was walking up to the house. As soon as Beckett had let her go, she rushed to Skye, hugging her gently and kissing her cheek.

"I'm alright," the investigator assured her wife. "I just need some rest." When Mary had let her go to take her hand she turned to Wade and said, "Thanks for the ride."

"You're set?" the officer asked. "Chief told me to make sure before I made my way back to the station."

"I am," Skye said with a smile. "So head back on patrol." As soon as Wade was back in his car she was gasping when her wife suddenly ushered her inside. "Grá, I'm fine," she told her firmly.

"I don't believe it," Mary said. "You collapsed."

"For a second," Skye said. Hearing Mary snort in disbelief, she said, "Okay, seconds but I was awake very shortly after."

"What happened," Beckett said once she and Castle walked back inside after making sure Wade had made it outside the gate.

"I think we should sit somewhere and talk to her about this," Mary said, having helped her wife with her things. "The office would work," she said sternly before Castle was responding rapidly.

"Do you want something to eat or drink?" he asked the investigator.

"Just some water," Skye replied before she was allowing her wife to lead her to the office. Once she was sitting down, she told the others, "I'm afraid I don't really have much for you. Just that there is no girlfriend or significant other in Kipling's case."