This was originally meant to be a one shot but will now be two or three chapters long. Set mid season 4, sometime after 4x10.

Enjoy!

Disclaimer: I don't own Castle or the characters.

Beckett woke with a start, the last of her dream slipping away. Whatever she'd been dreaming about was strange but she couldn't quite remember it and since her alarm hadn't gone off yet, she snuggled down back under the blankets to go back to sleep. That was when she realised something was wrong. The sheets felt too soft, so did the bed, and she was sure she'd put more clothes on that what she was wearing now.

Slowly she opened her eyes, thinking that maybe she was still dreaming. She looked around the dimly lit room and was shocked when she realised where she was. What on earth was she doing in Richard Castle's bedroom? She couldn't think of any reason she'd be there because at this stage, they were just friends, even if she wanted to be more than that.

Beckett sat up, looking around and saw that she was alone, Castle nowhere in sight. She sighed with relief, maybe nothing had happened then, although she still couldn't remember how she'd gotten here. She moved her arm to pull back the covers and that was when she got a second shock, her arm was considerably different looking than it had been the night before, it looked more like…Castle's? She must be still dreaming.

It was then she started to notice other things too as her mind began to wake up properly, namely that her body no longer felt like her own. She whipped the covers off quickly then and gasped at what she saw and it definitely wasn't her body. She was greeted with the sight of male, very naked chest and pants covering the lower half of her body. But it wasn't her body, was it? She'd spent enough time looking at this body to know who it belonged to. Her hands flew to her face and again, those features did not belong to her. How could this be? She must be still dreaming, right? But no, she was fairly certain that she was awake now, and somehow in Castle's body? Beckett rushed to the bathroom then and what she saw confirmed her theory, she'd somehow switched bodies with Castle.

She grabbed his phone off the bedside table, quickly dialing her own number. The phone rang twice before a voice came through the phone, "What on earth is going on?"

XXX

Castle slowly opened his eyes as he woke up and his mind began to come back to reality. He'd been having a weird dream but the more he tried to remember it, the more the images faded from his mind. He gave up, rolling over and pulling the blankets tight around him. That's odd, he thought, the sheets felt different than usual but it wouldn't be the first time he'd woken up in someone else's bed so he didn't think much of it.

A few minutes later though, when his brain was finally starting to work, he realised that he remembered going to sleep in his own bed last night. He wouldn't have slept with some random woman anyway because he was hopelessly and stupidly in love with Kate Beckett, whether she felt the same or not. He opened his eyes to look at his surroundings, hoping they'd give him some clue as to how he'd ended up in a strange bed.

His glance around confirmed that it wasn't his bed but a thrill ran through him when he saw the photo on the bedside table, one of a younger Beckett with her parents. He was in Beckett's bed? Surely he would remember if something had happened between them, right? He couldn't help the smile that spread across his face though, even if he didn't know the circumstances of how he'd ended up here.

He sat up, calling her name as he did so but the sound that came out of his mouth was not what he was expecting. Looking down quickly, he saw something that he was not expecting as well, this certainly wasn't his body but he already knew whose it was. He must still be dreaming right? Because what other explanation could there be for the fact that he was in Beckett's body?

How he didn't notice immediately he wasn't sure, he'd blame it on lack of coffee. But now, his whole body felt different and the hair falling past his shoulders was new for him, as was the fact that he now had parts he hadn't had before.

Looking in the mirror confirmed what he'd already suspected but seeing Beckett from this angle was certainly different. It wasn't the fact that she was wearing her pajamas, shorts and a t-shirt, but the fact that he was seeing her through her eyes, literally.

Just then her phone rang and he quickly answered it, realizing that if this was happening to him, it most probably was happening to her too.

"What on earth is going on?"

XXX

Getting dressed had been an interesting experience for them both which they were never going to speak of and now Castle had just arrived at his own loft where they were going to discuss the strange predicament they were in.

"Any ideas of how this happened?" asked Beckett after she'd accepted a cup of coffee Castle had bought on the way. It was the strangest thing talking to yourself like this but both of them were trying to put that out of their minds for the moment and focus on how to solve their problem.

"It must be that woman, it has to be," replied Castle, referring to a woman from their previous case, one they'd solved yesterday actually. Her son had been murdered and she'd been at the precinct being questioned by the boys. As she'd left, she'd walked past an arguing Castle and Beckett. She'd then stopped and looked at them both before saying something about that they should try walking in each other's shoes and stop being so blind. They'd both looked embarrassed to be caught arguing but other than that, they didn't think too much about the woman had said, they'd just apologized to each other and continued on their day like normal.

"You can't be serious, how could she have possibly done this?" asked Beckett. Trust a writer to come up with a story like that, an old woman cursing them for not getting on and being blind, whatever that meant. Beckett did have a feeling she knew what the "blind" part was referring to but she was specifically trying not to think about it.

"You got any better ideas then?" asked Castle, coming up with nothing better himself.

"Well no, but I refuse to believe that that's what caused this," replied Beckett, fresh out of other ideas herself.

Before Castle could reply Beckett's phone started to ring. She reached for it before realizing that being in Castle's body meant she couldn't answer it so she let Castle answer it instead.

"Beckett," Castle said once he'd hit the answer button. Hearing Castle actually pretend to be her just made things seem even weirder than they already were.

"Alright, we'll be there soon," said Castle before he hung up. "Bad news, we've got a case."

Beckett groaned, this could not be happening. Not only was she in Castle's body, she'd now have to pretend to be him. She groaned again, head now in her hands as she realised Castle would have to pretend to be her as well. She can't see this going well at all, today was certainly going to be an interesting day.

Not too confusing I hope. What did you think?