A/N: We're finally winding down in this story. Finally moving toward the endgame. What is that endgame you ask? Well, quite frankly, I'm not even sure that I know, but we'll see together. Just wanted to take a quick moment, too, to thank everyone who has taken the time to shoot me a review on this one. As I've said many times, I know this isn't my most popular story, but for my money, I don't know that I have more fun writing anything else, and I want to see how this all ends. So for now, Switch has my complete focus, at least on the writing front. Also, a quick shout-out to BDaddyDL for taking a final readthrough with this. Hopefully this time, we (the royal we, of course) can avoid pronoun errors that make us (royal us) look ridic.

Oh, and one other quick note: This chapter is told from the point-of-view of Chuck, as opposed to most other chapters in this story, which have been from either Sarah's or Anna's point-of-views. So don't let that throw you. Anyway, no more notes for now. Enjoy!

Chapter 10: A Sarah in Anna's Clothing

Once, while playing around with some new equipment that had just come into Castle, Chuck accidentally tranqed himself. Casey still hadn't let him live that one down.

Then, there was the two or three week stretch back in January when Casey became obsessed with a blowgun filled with small tranq darts when the NSA agent would regularly knock Chuck out. Be it for his own amusement, or because Chuck had gotten—in Casey's opinion—out of control.

But between those two experiences, and a couple of others that were still a little foggy in Chuck's memory, he had become well aware of the hangover-like effects of getting put under by a tranquilizer. A feeling he had the moment he cracked his eyes open.

His room was dark—wait, how was he in his room?

Chuck tried to remember exactly what had happened. He remembered being on a mission. He remembered Sarah and Casey getting into trouble. He got out of the van, and was going to help them, when…

It was kind of a blur after that. Was he attacked?

Then, as he finally began to gain his wits, he remembered. He was halted by a really tiny, but still terrifying ninja. She—at least he was pretty positive it was a she, as the skin-tight outfit she wore showed off a lot of womanly curves, even in the dark of the building parking lot—told him to stop. He tried to run away, and then…then she tranqed him.

But if he was knocked out by an enemy, what was he doing in his own room? No doubt Sarah and Casey had rescued him. Unless this was all a post-tranq dream.

"You're awake."

Chuck recognized that voice. It was soft, and feminine, but there was a definite edge, and it belonged to…

"Anna?" Chuck asked, confused.

He turned his head, and saw Anna Wu, sitting in his desk chair. And she was wearing a very familiar outfit. It was the same ensemble his attacker had worn. But that couldn't be right. Anna wasn't a spy. She certainly wasn't an enemy spy. And even if she was, why had she brought him back to his apartment?

Perhaps he was having a dream. A very weird dream. Was that tranq coated with something? Chuck had read about DMT, and how users would sometimes report lucid dreams within dreams. Is that what was going on? Was there an injectable form of the drug? Or maybe something similar.

She rose when he looked at her, and began walking over to his bed.

Suddenly, Chuck was fully awake, and he most certainly was not dreaming.

Anna sat on the edge of his bed, and folded her hands in her lap.

"I'm sorry I had to tranq you," she said.

Ah-ha! It was her. But that still didn't make any sense.

"I was just trying—"

Chuck watched her pause and begin to chew on her lip. It wasn't an expression he'd seen Anna make before. It was a nervous habit of Sarah's, though. Had the two of them been hanging out more than Chuck realized? Enough that Anna may have picked up on one of Sarah's mannerisms? That seemed unlikely.

"I was helping Sarah," she said.

"Helping? Anna, do you know what…"

Chuck abandoned his line of thought, as a much more pressing issue occurred to him.

"Anna! You have to—if they see you they'll—"

Chuck jumped out of bed and stumbled across his room, using a pillow he'd taken with him to smother a surveillance camera he knew to be placed on the far wall.

"You have to go before they—"

Anna stood and walked over to him, placing her hand atop his.

"Shhh," she said. "It's okay, Chuck. The surveillance is being looped. No one knows I'm here."

If his head was swimming before, Chuck was pretty sure it was about to explode now. How did Anna know about the surveillance? Why was she so familiar with his spy life? How had she even gotten access to the cameras?

He didn't ask her any of these questions, but by the sympathetic look on her face, he knew she knew he had hundreds of them.

With his hand still in her much smaller hand, she led him back to his bed, and coaxed him into sitting.

"I know you have questions," she said. Which was the understatement of the year. "I'm going to answer all of them as best I can, but I need you listen to what I have to say with an open mind. And I need you to understand that there are some things I can't talk to you about."

Once again, Anna was reminding him of Sarah. That sounded exactly like something Sarah would say.

"First of all, again, I'm sorry I had to tranq you. Sarah wanted me to help, wanted me to make sure you stayed in the car. I don't regret what I did. It was the right thing to do. But I'm sorry you had to experience that."

Chuck nodded.

"Now, I know you're probably wondering how I found out about your spy life."

Again, Chuck nodded.

"Okay, this is one of the things I can't tell you everything about, but suffice it to say that, recently, Sarah and I became closer. Much, much closer."

Chuck could tell there was hidden meaning there. What, he couldn't even begin to guess. But if she was determined not to tell him the whole truth, he knew there was nothing he could do to get it out of her.

"Now," she said, taking a deep breath. "There are some more personal things I wanted to talk with you about."

"Personal?" Chuck asked.

"Um, yeah," Anna said. "Look, Chuck, I know you're not really happy in your relationship with Sarah."

"But I—"

"Please, let me finish," Anna said. "The thing is, Sarah's a spy, Chuck. That's all she can ever be. That's all she can be to you. Even if she wants to be more, and I'm sure she does, her job won't let her."

Chuck couldn't make eye contact anymore with Anna. She was far too on-the-button. And she was bringing up his greatest fear, as it related to Sarah.

Anna reached out, and took his hand again, this time cradling it with her other hand.

"But there are others. There are girls that would give anything to be with you. That would give you everything you need."

Chuck's head shot up. Was Anna hitting on him? That just seemed…wrong.

"But you—"

"I'm a normal girl, Chuck. I'm not a spy. I can give you all the things Sarah can't."

"But—Morgan," Chuck managed to stammer out.

Anna sighed. "Chuck, he's not—I want you, not him." She moved her hand to his cheek, and gently stroked his cheek. "I want you, Chuck," she repeated.

Chuck nearly recoiled at her touch. It wasn't that it wasn't pleasant. Her hand was soft, and the way she—no, it was wrong!

Chuck grabbed her hand and brought it away from his face.

"Anna, I can't. And not just because you're with by best friend, which is a reason. But also, because," he paused, and took a deep breath, swallowing nervously. "Because I love Sarah. And I know our relationship is complicated, and I know she might never love me back, but—I can't explain it. It's just that, I've screwed up twice already, and I can't do that again. I can't do that to her, and honestly, I couldn't do it to myself. She makes me happy."

Then, much to his surprise, Anna smiled. He'd just rejected her outright, and she was smiling. Had this been a test? That's the only thing he could think of to rationalize why she'd be happy.

But whatever was making her smile, he could tell by the look of concentration on her face that it was much more complicated than a simple loyalty test. It was something that had given her pause.

They sat in perfect silence for several moments, while Anna continued to appear to think. Then finally, she spoke again.

"Chuck," she said softly, "that's really sweet."

"Gee, thanks for making me feel like I'm eight," he joked, which made her smile only widen.

"But there's something I need to tell you. Something I really need to tell you. Then you can make your decision."

She took a deep breath, and seemed to be readying herself for some type of huge revelation.

"When I woke up yesterday, I wasn't myself anymore," she said.

"Yeah, I noticed you were acting a little weird. So was Sarah. Casey said it had something to do with the moon."

For a moment, Anna just looked confused. Then she shook her head side to side, no doubt to regain her focus.

"No, that's not what I mean. I don't mean I was feeling unlike myself. I mean I was literally not myself anymore."

She paused again.

"Chuck, I'm actually—"

A/N: Yay for cliffhangers! What will Sarah do? Will she admit her true identity, thereby forever trapping herself in Anna's body, but also giving her the freedom to date Chuck? Will she stop herself? Will someone else stop her? Does anyone other than me care? All those answers and more coming in the next chapter, which should be out, well, whenever I have the time and motivation to write it, haha. You guys are awesome. Peace.