A/N: I can promise that this will in fact be multi-chapter. Also this is my first AU fic, so…be gentle but constructive criticism is always welcome.

Disclaimer: We've all been reading fanfics long enough to know how this goes. But just for the sake of it, I don't own any of this all rights go to Castle & Co.

"What the-" Kate Beckett cursed as Richard Castle's body began to disintegrate. After all, he was travelling between dimensions to his old one.

Back at the precinct, it was another long, boring day. "Just paperwork and politics." Just as she had told Mr. Castle. Who was he though? How did he know her and where in hell was he now? Kate Beckett might not deem herself worthy of being a homicide detective but she knew she needed to get answers. So she turned to her computer and typed in a search, "Richard Castle".

Within a second, the computer spat out his details. More importantly, an address and a phone number. Was it worth looking into? Castle's last breath still stuck to the back of her eyelids and how he jumped in front of a bullet to save her life. The "Because I love you Kate." still ringing in her ears. She had called his place only to be told that Rick was just fine and to her surprise, writing. Richard Castle; her universe's Richard Castle hadn't written anything since that pathetic excuse of a book more than 5 years ago.

The other Richard Castle seemed to be doing well and have something nice going on with the other Kate Beckett. Her life hadn't turned out the way she'd hoped it to and maybe she could go over to his place and…no, that was stupid. Captain Beckett had a lot of paperwork to do and she didn't have time for anything other than work. That was the thing though, her life was boring, a little excitement couldn't hurt.

Before she knew it, Beckett was knocking on Castle's front door. Regretting it the moment her knuckles touched the cold hardwood, she began to turn around and leave. Only the door opened and stopped her. It was Castle, alive and not bloody…and completely clueless. "Can I help you…?"

"I'm sorry for bothering you, this was stupid." She apologized quickly and began to leave.

"Captain Beckett?" Castle asked, stopping her.

She turned around and looked at him questioningly.

"My mother said you called to make sure I was okay…?" he wasn't sure what that was about either. "And that she bailed me out from your precinct's holding…?"

Beckett nodded slowly, "Yeah,"

"Okay I guess." Castle said. "Only I don't remember the latter."

"Long story short, it wasn't you."

Castle looked at her questioningly.

"Not 'you' you."

"What?"

"Like I said it's a long story. I'm sorry I bothered you. I'll be on my way"

"No, no." He insisted. "You can't just start telling me something like that, get me all excited and confused and then leave."

"It's a long, confusing story. And it makes me sound crazier than I'd like to admit. Trust me, you don't wanna know."

"But I do, only more now 'cause you said I wouldn't wanna know. Also because you came here to tell me, you can't just leave without doing just that."

"What makes you think that's why I'm here?"

"Because 1. You have to tell it to someone who might actually at least consider believing you." He was now starting to sound more like the Richard Castle she had worked her case with. This also earned him a look from Beckett but Castle pretended to have not noticed and continued. "And 2. Why else would you be here?"

"You could be in trouble." Beckett suggested.

"Yes, but then I'd already be in handcuffs and the captain wouldn't have come to arrest me."

She gave him a slight nod, impressed.

"So, why don't you come inside and tell me?"

Beckett nodded in defeat and followed him to the living room where he led her to the couch. "Can I get you a drink?" he offered before sitting down on the couch opposite hers.

"No thanks, on the clock."

And so Castle sat down and waited for her to start. Which she did. Kate told him everything. It felt nice to get it out of her system. She couldn't have said anything to the detectives Ryan and Esposito, now could she? Having them think their boss is crazy wasn't really something she wanted. Castle listened with intent, yes there were a few wiseass comments at the beginning but by the end of it, he seemed like an excited puppy.

"So…you want to give a go at what he had with…the other you (?)" He asked once she had finished.

Beckett didn't answer. She did, she did want to give a go at what the other Castle and Beckett had. And her life was boring, even if this didn't lead to anything real, it would be better than what she had at the moment.

"I like the sound of that." Castle said. "Just one question: am I still a writer in that universe, if we're together?"

"Apparently, you are." She admitted without feeding his ego anymore.

"I'm in." He replied. "I'm kidding." He added quickly. "But if what you said is true, which I am crazy enough to believe is, I don't see a reason why we shouldn't." Beckett liked the sound of that.

"Did you say he died, the other me?" Castle asked.

Kate nodded before he continued, "Can I…see the body…?"

Beckett rolled her eyes subconsciously. "You can't."

"Worth a shot."

"No I mean you can't. There is no body."

"But you said he died."

"He did."

"So where's the body?"

"Gone."

"Gone?"

"Gone. It disintegrated."

"Wow…travelling between dimensions, back to his reality?" he suggested.

"Probably,"

"Anyways, I should get going, I have a lot of work left." Beckett said after a few minutes and began to leave…only to turn on her heal as she reached the door to Castle's voice.

"We should at least swap numbers."

"Right, right." Kate muttered, digging into her pocket and pulled out her card. "Why don't you give me a call sometime later tonight?" She said as she handed it to him.

"When do you get off?" he asked.

"I'm a bit behind so I'll probably be held up longer than I want to…nine at least."

"Okay, I'll be sure to distract you till then."

Disapproving glare. Hmm, he already liked her more than he thought he did, also she looked like a goddess, why would he be complaining? "Promise I won't."