Hello and welcome to Part III. The crossover will only be for the first two chapters, which act as a sort of Part I and Part II. Both will be posted tonight.

You don't have to necessarily read Part's I and II of the series, as the summary should've explained most of it.

Hope you enjoy reading it as much as I did creating it.

Chapter One

Her name was Amelia Pond, and she was going to be incredible.

She was currently seven years old, and although her parents agreed that she was, in fact, incredible, they also agreed that she was too young to be putting into practice the notion of saving the world.

She had no idea how this would happen, dreams of people and far off places always falling into place, but there was one clear image in her mind: Amelia Pond, the reigning hero.

She was seven years old, and there was absolutely one thing she did know: blue boxes that appeared from nowhere should not be in her yard, nor should grown ups be peaking out of it, looking around.

"Anna!" he called back, into his blue box which most definitely shouldn't have had light spilling out of it. "I think we've landed somewhere in-"

The man's eyes landed on her.

She stared.

The man's eyes stared back.

Slowly, very slowly, he raised his eyebrows. "Could I have an apple?" he asked. "All I can think about. Apples. I love apples. Maybe I'm having a craving? That's new. Never had cravings before."

"Are you an alien?"

He narrowed his eyes on her. They were very expressive, those eyes. They were also very old. Amelia could see that right away. She was very intuitive, it's what her teachers always said (as well as disruptive in class and loud, but she always ignored that. She was intuitive and that's what really mattered. All the best, world-saving people were intuitive). "Are you? I mean, technically, from my perspective, you're-"

Amelia also knew that strange women weren't supposed to fall out of the box, which she was entirely sure was only big enough to fit one person. What made the woman strange was this:

She was singing, even as she let out a burst of giggles.

"Sorry about that!" he said, quickly leaping down to pick her up. "You'll have to excuse her, she's a bit..." he waffled his hand back and forth. "About that apple?"

She crossed her arms across her chest, looking at him expectantly. "You didn't answer my question."

"You didn't answer mine," he shot back, just as fast.

The woman burst out giggling, interrupting her singing entirely this round. "Are you- arguing- with the seven year old?" she asked, in that way that adults did when they thought 'seven' meant 'baby'. She was not a baby. She was seven years old, practically a grown up, and much more aware than the woman who appeared to be acting like Aunt Sharon when they'd gone to Uncle Carr's wedding. That had been right before they'd moved to Leadworth.

Stupid Leadworth. It had put a damper on her saving the world plans, but it had appeared that an opportunity had presented itself in the shape of a man coming out of a blue box. She wasn't so sure about the woman, yet, but she put a bookmark on the thought, especially when the woman did what she did next.

"No, we're just talking- Anna, no, don't-!"

He sighed, and Amelia saw his chin fall to his chest out of the corner of his eyes. She was too busy watching the literal light show that was taking place before her eyes.

"Woah," she whispered.

"Very pretty, no?" the woman asked.

"How're you doing that?"

"Magic," the woman replied.

"Magic doesn't exist," she immediately shot back, looking at her like she were stupid because most grown ups thought kids were stupid and she was anything but.

"Oh, so you don't believe in Harry Potter?" the woman asked.

Her face screwed up in confusion. "Harry what?"

"Harry- Harry Potter- what year is it, 1996?" she asked, looking back at the man before she bopped him on the nose. He was looking at her the same way her mum did when her dad did something silly. She much preferred that to the yelling they would sometimes do when they thought she was asleep (and sometimes when they knew she wasn't, though she wasn't concerned with this. When she saved the world, her parents would also be saved. They were part of the world). The woman (Anna, she thought he'd called her) searched his eyes. "Doesn't come out till next year, you poor child-" at this point, she turned away from the man and turned to Amelia, a book in her hand. "Here!"

The man's eyes widened. "Anna, no-"

"But she's never read Harry Potter," Anna pointed out, while Amelia caught sight of the cover. It was a blank book. Why was she giving her a blank book? Definitely strange.

The man grabbed the book from her hand, chucking it back at the door. "And she can-"

The door gave an impressive thump when the book hit it, and he looked back at the door, seeing that it had closed. He frowned at that, before he dismissed it out of hand. "-read them when they actually come out, you can't give a child-"

"I'm not a child!" she immediately protested. "I'm almost eight."

That was a lie, but they didn't need to know that.

"You can't give a smallish adult books that haven't come out yet!" Amelia nodded, satisfied that she'd been called a smallish adult. The only difference between grown ups and kids were their size, in her incredible opinion.

"I'm an all-powerful being! I do what I want!" she shouted at him.

The scenery around them changed. From one second to the next, they were no longer standing in her backyard. Instead, they were standing in some forest somewhere.

"See?" Anna asked, before she promptly passed out.

The man immediately looked panicked, trying to catch her before he simply dropped with her. He started to mumble, something about, "I'm the one that's supposed to be loopy, I've just regenerated!"

By contrast, Amelia was not panicked. Amelia was very happy to be suddenly standing in a forest with a man and a woman, possibly aliens (definitely aliens, her mind supplied, considering where they were suddenly standing). Now her saving of the world plans could move along more quickly. Even if she didn't know what, exactly, she was saving the world from.

"Is she all right?"

"Yes. No. I don't know, do you think she looks all right?" his last word was punctuated by a coughing fit.

"Are you all right?" she asked him.

"No, I'm fine. It's okay. This is all perfectly normal-" Orange stuff came out of his mouth, and she nodded.

"So you two are aliens, then?"

"Yep. Well, no, I'm an alien, she's..." he paused, looking at the forest floor. "Complicated."

He stopped, his eyes wide, and Amelia tried to see what he was seeing.

In the span of a second, everything changed. The Doctor was fast. Even with regeneration having just happened, he was able to put the puzzle pieces together. The puzzle pieces were this:

Anna had just talked about Harry Potter.

He had said that she couldn't reveal Harry Potter to a child early.

They'd just been teleported.

A led to b led to...

Them being in Harry Potter.

It was the only explanation.

Well, there were multiple explanations, but the Doctor saw the rat and knew the next logical step was that his was Peter Pettigrew and, well, his time sense was on the fritz (or perhaps didn't work in other dimensions he didn't know, did he?), so he did the only logical thing that any sane person would do in this situation: grab Peter Pettigrew before he quickly put the rat to sleep.

It was all simple math, and it added up when the rat had a brain the size of a human, as opposed to a rat. Well, either that, or he was still loopy from the regeneration energy. It was really anybody's guess.

Then, well, his knowledge of the third Harry Potter book kicked in and of course this would be the scene when the werewolf was roaming around the woods.

"What is that?"

"A rat disguised as a man- no, a man disguised as a rat," he quickly corrected himself. "Which I need you to hold."

"Why is he disguised as a rat?"

"Well, dear- sorry, I didn't catch your name."

"Amelia Pond," she answered him, simultaneously taking the rat from him.

He immediately broke out into a wide smile. "Amelia Pond. Like a name in a fairytale. Wish we'd landed in one of those. Well, we sort of have. Except, the werewolf isn't dressed as grandma in her nightie. Suppose that's better. Or is it worse? Who knows. Point being, there's a werewolf roaming the woods, and we need to get back to the castle before it catches us."

"I thought you said this wasn't a fairytale," she pointed out, as he readjusted the sleeping Anna in his arms.

"Yes, well, I suppose it's easy to mix up the two without context." He stopped, suddenly, looking back at her suspiciously, thoughts of time lord traps and other traps dancing in his head as he looked at the almost eight (actually, seven and one quarter, didn't they usually round down when it was that low?) years old human child standing in front of him, calmly holding the rat that was disguised and not at all panicked that she were standing in a forest suddenly. "You're taking this rather well," he pointed out.

"I'm going to save the world one day," she told him, blatantly, in only the way a human child could. "You have to be ready for these things."

He raised his eyebrows, smiling. "Amelia Pond, I think I quite like you."

Amelia Pond would never admit it, but fear curled around the edges of her eyes as they heard the werewolf howling in the distance. "Didn't you say there was a wolf?"

"No, no," he quickly corrected her. "I said werewolf. Huge difference. I'm the Doctor, by the way. Do everything I say, don't ask stupid questions, and don't wander off. And keep up!" he shouted back to her. She startled, quickly running after him, never knowing that his hearts were also doing double time in his chest at the fact that they were currently lost in the forest (was it the Forbidden Forest? He couldn't remember) with a werewolf potentially nipping at their heels (and other bits).

#####

"But who are you?" the fear had slipped away to be replaced with curiosity. He didn't know if that was better or worse, but he decided to roll with it.

"Told you. I'm the Doctor."

"But that's just a name, that's not who you are."

"Same thing with me," he said.

"And who's she?" she asked. "Are you two married?"

Surprise filled his chest and he looked back at her. "How could you know a thing like- oh, the rings," he said, and he turned back around, picking up his pace. He didn't remember when the werewolf was incapacitated, but he did know he didn't want to stick around to find out.

"You two act like my mum and dad."

"Your mum and dad?" he questioned, like he'd never heard the words used before. Horror flushed through him. "Oh, your mum and dad." Of course the human child had a mum and a dad. He didn't think they'd take kindly to finding out that their seven year old daughter had been kidnapped by an alien and an all-powerful being, though apparently she was bound to save the world so they ought to get used to these things at a young age.

Yes, definitely still loopy from the regeneration. Definitely still wearing his old clothes as well, which he hadn't noticed until the material rubbed against him and he suddenly remembered he was wearing his old self's clothes. It didn't matter. They would get back to the Tardis, sort out this mess soon enough. Maybe take Amelia for a bit of harmless sightseeing, a supervised trip. He suddenly remembered a planet that had features resembling Christmas. He could-

"What were you two doing in my garden?"

"What? Oh, we- our ship sort of landed there. Had a bit of a kerfuffle, a minor incident, really, with my people. Some things happened. Anna's a bit knackered, but the ship landed and she was suddenly up and asking me to see where we were, and- oh."

And he'd been reticent to do that because of her grief.

In the midst of the little girl and the being inside of the real Harry Potter (and that was incredibly cool. Even 1100 years later, and things like this could still surprise him) he'd forgotten all about Anna's grief and what it had nearly done to the universe not a few days prior (or however long it had actually been since he'd been tortured within a literal inch of his life. Not the point. Moving on).

He was distracted when Amelia spoke again.

"Do you even know where we're going?"

"Absolutely not," he told her, shifting Anna in his arms once more. "But, I'm sure something'll turn up eventually. It usually does."

It was a cue. All of a sudden, people with wands burst forth, pointing their sticks at them and demanding that they put down their wands.

"Unarmed, we're unarmed!" he managed to get out. "Wandless and everything!"

He supposed it made sense that Ministry people would've been patrolling the grounds after everything that had happened. He also knew they would shoot to stun, not kill, but it was about three seconds before he heard the, "Oi!" from Amelia that he realized he wasn't sure what energy from this dimension would do to them.

He whipped around at the sight of one of them poking the rat in Amelia's hands with his wand, though she was holding it protectively against her chest, looking at the man in consternation (and it was immediately evident that Amelia did not like this man. Her emotions were printed across her face. It made her an easy read, but then again, who wasn't to an 1100 year old alien like the Doctor?)

"Somebody looking for a rat- oi!"

#####

When Anna awoke, it was to find herself laying on a bed that was only not the softest because the beds on the Tardis were gloriously soft. She smiled when the first person she saw was the Doctor.

She frowned when she realized he wasn't wearing a bowtie.

"Why're you wearing that?" she asked him, confused, reaching out and touching his face.

He smiled, and she realized that his emotions were off-

The connection.

The time lords, Rassilon.

Amelia, and Harry Potter.

It all came back in a rush, and she frowned as she searched him. "I need to fix this," she said, quietly.

She was already tuned to the turn of this universe, or perhaps the mistake was so glaring that she was feeling it, that aside. Peter Pettigrew had been caught. If Peter Pettigrew had been caught, then he'd never have a chance to find Voldemort. It meant Voldemort wouldn't get resurrected-

Or no, he would, but-

Pain flashed through her and she shook her head, standing, running through battle plans. "I need to-"

"You're up and about quickly."

She frowned at the person in front of her. She knew him-

"Oh..." she said, quietly.

"I'm Sirius," he said. "Sirius Black."

Apparently, she'd been out long enough that he'd not only had time to have the charges cleared from his name, but also that he'd been able to shower and clean himself up enough that he was presentable (though he hadn't been able to wash Azkaban off of himself entirely. That would only come with time).

"Your doctor friend-"

"The Doctor," he quickly corrected him. "And-"

But, Sirius bowled over him. "-The Doctor says I have you to thank for my freedom? Something about you three apparating in at exactly the right time."

"Three- Oh, Amy," she said, quietly, and she looked around as if she might spot a flash of flaming red hair. She did do that, but it was simply Ronald Weasely, sleeping peacefully in the bed, Hermione sitting by his bedside, though she was looking at Anna when Anna looked over. She startled, looking like she'd been caught, before she turned back to Ron's side.

"Yes, yes, she did do that, and I've to-"

"I just wanted to say thank you," Sirius continued, patting the hand he still hadn't released. "I owe you my life."

"Hardly," she said. "Excuse me."

She wasn't trying to be rude, but she let Sirius' hand go, moving past him in a sweeping motion.

"Anna-" the Doctor started, but he stopped because she had.

"Ah, Ms. Monroe, was it? I wasn't expecting you to be walking quite so soon. Now that you are, perhaps a chat is in order, to clear a few things up, if you wouldn't mind?"

"I would mind."

She was surprised when the Doctor's back was to her, suddenly standing in front of her.

"As I've said, there are things what need discussing and I can't-"

"Doctor, it's fine, I need to-"

She was surprised when he reached out, grabbing her forearm as she tried to walk past him.

"It's not fine," he told her, a look in his eyes. "Considering what it is the last time that you said that you wanted to 'fix things', I'd say there are some things we need to discuss. Don't you?"

She raised her eyebrows. "Oh. You don't trust me."

She didn't have to feel it to know that's how he felt. It was imprinted on his face, in his body language, in the broken connection that was pulsating mournfully between them.

"And that's nobody's fault but my own, and I am sorry for that, but I screwed things up here when you grabbed Pettigrew and there's a brief window that I can still fix them so that Harry-" she paused, glancing over at the Boy Who Lived, the one who was sleeping peacefully in the bed next to Ron's. "-so that nobody pays the price."

"What's that about my godson?" Sirius asked. There were no ill feelings, and in fact, Sirius Black felt strange. There were parts of him that were shut down (probably out of necessity) but the rest of him just felt dazed, a strange glow about him. Shock, it would seem. The protective part of himself was waking up, and because he'd spent 12 years in Azkaban, she had no doubt that it would come back with a fury to compensate for all the emotions he hadn't allowed himself to feel.

"I can help Harry," she told him, and something vaguely like annoyance bloomed in the air between them, him wondering why she was making this infinitely harder and dreading what it meant but pushing it from his mind so that he could focus. "But I-"

"Help him with what?"

"Perhaps this conversation would be better had in my office?"

She felt relief fill her and she looked back at Albus. "I'm all for that," she said.

"Great, lead the way," Sirius said, and with each beat of his heart his feelings of wanting to protect his last link to James and Lily strengthened him. He felt himself slowly renewing, becoming the man he hadn't been in nearly 13 years (and Anna wondered quietly at the fact that her empath sense appeared to be so heavily active, but they really had bigger problems than why she was getting such an intimate peek into everyone's minds).

Well, everyone except for Albus. She frowned, barely reaching out-

She stood up taller when she felt an almost barrier pass between them, something like a thick dense fog surrounding him. He barely raised his eyebrows at that, barely tilting his chin up in a move that noted he knew what she had just tried to do.

"Sorry," she said, absentmindedly, and she pursed her lips.

"Actually, Sirius, I think it might be for the best if you stayed here for the time being. Harry could awaken at any moment, and I think it would give him some peace of mind to wake up and find his godfather by his side, as opposed to back in a cell in Azkaban."

Anna rolled her eyes. She had forgotten how manipulative Dumbledore could be.

"Great," the Doctor cut in. "Lead the way."

He deliberately parroted Sirius' words, but she looked back at him, shaking her head.

"I'll be quick, and we'll-"

"This is not a conversation," he told her, so quietly that she had to strain to hear him. "If you think that any part of me is letting you out of my sight after what happened at Bowie One, you would be sorely mistaken." He searched her, shaking his head. "You are forgiven," he told her. "But you're right, I do not trust you, and I'm not letting you out of my sight until we are at your first therapy session. Am I making myself extremely clear?"

Oh, she'd forgotten about the therapy session. It wasn't as if it was necessary, now. Her grief was basically gone, now that she'd thrown it at Rassilon in the form of energy.

But, there wasn't time to explain that now, or clear it up. She smiled sadly at him (though it was probably closer to a grimace) before she kissed his cheek. In the next moment, she put up a shield between them, stepping back in the same moment.

"Forgive me," she said, quietly.

He stared at her, and it almost wasn't even betrayal that lay on his face. It was just sadness, an aching, at the fact that the woman he'd once trusted with everything had so quickly turned into this, the woman he had to stop.

She ignored him as she made her way, following after Albus Dumbledore and biting her lip so she didn't cry.

#####

"Your daughter is safe, by the way."

She frowned, looking up at him to see that something like a knowing look in his eyes, that she'd confirmed something she hadn't meant to.

"Oh, Amy's okay?" she asked.

"Amy? I was under the impression she liked to be called Amelia," he said, moving about his office as if he were looking for something. She knew what it was, casual indifference masking the interrogation.

"You know mother's and their nicknames."

"Yes, and I'm sure hers will be terribly worried about her by now, considering she's been gone for about three hours. I'm not entirely clear on how you're explaining her absence, considering she's a muggle and that likely means muggle parents, of which neither of you are."

She just wanted to be back at the Tardis. That probably had to do with why she leaned back in her seat, raising her eyebrow. "Touching how worried you are about that child, considering you're lining Harry Potter up to be slaughtered."

"I have no idea what you're referring to," he said, coldly, sitting down at the corner of his desk, his hands folded strategically in his lap. "But I'm entirely sure that we're both too old to be playing games such as these. What are you?"

She dismissed him, shaking her head as she leaned back even further. "That isn't your concern. What is your concern are these."

She put the horcruxes on his desk, gathering them together. She made the mistake of not separating them, and she felt the power about to explode moments before she separated them, keeping them held in separate boxes with an energy barrier surrounding them.

"That was close," she muttered.

Albus had felt the horcruxes nearly come to life, and he stood, looking back at his desk. He looked down, fascinated, as the scene unfolded before him.

"It's everything but the snake," she told him. "Well, and the fragment that- Oh."

She felt her heart falling out of her chest. Harry Potter had only lived when the fragment of Voldemort had been killed because Voldemort had been the one to kill him. What of that-

"Oh, wait, obviously," she muttered, quietly, and she simply pulled the piece of him from Harry before she put it in something small and containable, easily destroyed.

She felt something stirring before she did, energies touching, a connection barely established.

Who are you?

The words whispered through her before she quickly put the soul fragment into the container, and any connection that had been established was immediately lost.

For his part, she'd never seen Dumbledore look so stunned. "Are these... What are these?" he asked, and he drew his wand before he made one of the boxes levitate, making it see-through.

She rolled her eyes. "Like you said, we're too old to play these games." She frowned when she realized she could feel him, and he wasn't lying. He knew they were objects of power, but he didn't know anything beyond that. She cursed quietly under her breath before she explained, about all of it. She finished with an eyebrow raise, and, "Harry Potter's safe, now. Try not to get his godfather thrown in jail again, yes?"

"Why didn't you simply destroy them?"

"That's your job," she pointed out, making it down the stairs and barely marveling at the fact that his office looked exactly the same as it had in the movies, unable to enjoy it fully because the Doctor, her husband, the man that she loved more than anything in the world and had wanted to hurt the least, who she had hurt the most, was waiting presumably to stop her. "Can't be doing all the work, can I?"

"I have a feeling you could, if it really suited you. I have a feeling you've just that much power, Ms. Monroe."

"Have all the feelings you want," she told him, reaching the door.

"You cannot mean to simply leave us like this. There will be questions."

She laughed, looking back at him. "Which you're more than adept to answer," she told him. "And actually, what questions? The horcruxes is a secret you'll take to the grave. Harry Potter's safe and you'll tell him when he gets older, but other than that? There are no questions if there's just secrets," she pointed out.

"You talk as if you know us."

She huffed out, impatient. "I talk about you like a person who's impatient to get home. I wasn't even supposed to be here. Neither of us were," she muttered.

"That's what your husband and... daughter said as well," he said, and she frowned before remembering rolled through her and she rolled her eyes. "That you were simply passing through. Who are you?"

She smiled, looking up at him. "Exactly that. People passing through." She smiled. "Have a good life," she told him.

"Thank you, Ms. Monroe. And not just for the well-wishes. If there's anything we can do to repay you-"

"There isn't," she said, curtly, before she exited the office, remembering to teleport herself and the Doctor back to the Tardis.

In her haste to get home, she didn't remember to teleport Amy, though nobody would be any the wiser for quite a bit of time after the fact.

#####

Both of them opened their mouths to speak but they both stopped at the fact that the interior of the Tardis had changed.

It looked exactly as it did on the TV show, all the fun bits and bobs in place. No longer was it two armchairs and a bookshelf in the floor. Instead, it was full to the brim of things to look at and touch. Now, the only thing that was missing was the tweed and bowtie.

"She's really outdone herself this time," the Doctor said, searching the room.

"I'm sorry, about before. It's resolved, things are put right, and-and I-I worked out my grief when I-I attacked Rassilon-" she flinched at the memory of it but was grateful that she hadn't killed him in her rage. "-so that's all good, too. I don't need therapy anymore, but I understand- I get it, if-if that's what you need, in order to-to start trusting me again, because I'm sorry, really, I am."

He looked over at her, this look on his face, about to ask a question, before he stopped and his mouth closed. He nodded, a not genuine smile crossing his face. "Okay," he said, quietly. "Let's do that, then. It's all set up, just have to pop in the coordinates, we'll head over."

So, they did.

#####

There was relief apparent on him the moment she stepped out of the building where her new therapists office sat. "How'd it go?" he asked.

She shrugged. "Fine," she said. "Still in the 'getting to know you' stage, so we haven't really gotten to the meaty stuff."

"That's fine, totally fine," he reassured her. "When's your next appointment?"

"Two weeks," she told him, and he frowned. "Yeah, normally it's standard for it to be one week or less the first few months of therapy but I thought I'd give her some time to adjust to the whole 'all powerful being' thing."

"Was she not okay with it?"

Anna shrugged again. "She was a little unsettled, but she'll adjust."

"Good," he said, and then he was kissing her.

She made a noise of surprise a second too late before she pulled back. "What- what?"

"New body," he said, still having not changed out of his clothes since he was probably too nervous. "Not to mention, I spent the past however long being tortured-"

"I'm sorry, you what?" she asked him, a vindictive little part of her happy that she'd hurt Rassilon now.

He waved her off. "Old news, point being, this is basically resolved now so I thought, hey, maybe take the new body for a spin with my beautiful, gorgeous, fit as hell wife. If that's all right with you, anyway."

She smiled, leaning in. "Perfectly fine."

There was still unresolved things between them, but at the very least, they were alive and okay. There would be time for talking later. Celebration was waiting.

#####

"So, um..." The Doctor started the next morning, in the kitchen. He was making them breakfast and Anna prepped herself for him to start the discussion of what it would take for him to trust her again. "I'm sure you did, but I just want to check and make sure, since I noticed a strange lack of Amelia... you did send her home, right?"

Her eyes widened. "Oh, fu-"