Thanks for all the kind reviews, they make my day every time I read them! So glad that people are enjoying this story. And as I promised in the A/N of the last chapter, Fish fingers and custard to all reviewers! Anyways, a new chappie. I don't think it's my best, although I'm not exactly disappointed with it. Lots of fluff in some parts, so be warned! (I really need to stop writing extremely long A/N's at the beginning of each chapter, you're probably here just to read it (and hopefully review! :3) and not listen to me rambling. So I'll shut up, shall I?)

Eventually, both broke away, panting for breath. The Doctor looked into Amy's chocolate brown eyes, and for a second, he felt 250 again.

"I can't believe it..." Amy grinned. "But I still don't forgive you for leaving me twice."

The Doctor's expression changed from happy to one filled with guilt. "I'm sorry Amy. I really am. Is there anything I can do to make you forgive me?"

He didn't like the look of the naughty smirk on Amy's lips. "Well, as a matter of fact, there is."

"Oh Amy..." he said. "You do realise Prisoner Zero is after us and the planet's going to be incinerated?"

"He can wait," Amy hissed seductively, grabbing his tie and pulling him closer to her.

"Amy, no matter how much I would love to do this right now, if we did, then the world would probably end up being incinerated."

"Fine, misery guts," Amy pouted, flicking his arm. "Let's go and save the world from the aliens then. But afterwards, you have to promise."

"Amelia," he sighed. "I'll think about it. It's been awhile."

"Well I'll fix that," she smirked, running her hand down his chest, feeling his muscles tense beneath her touch. "Oh, and there's something I forgot to tell you, Theta."

"Yes?"

"That night," Amy began. "Was the best shag I've had in my life."

The Doctor smiled, slightly embarrassed but also quite chuffed. "Well..."

"I never got to tell you because you ran off," Amy's tone now sounded bitter. "Never run away from me again. Understand?"

The Doctor nodded. "I won't, Amy. I promise I'll never leave you again."

Just as Amy was about to speak, they both heard something coming from an ice cream van behind them. It was a sinister voice, booming like the one they'd heard back at Amy's house.

"Prisoner Zero will vacate the human residence or the human residence will be incinerated."

The voice was coming from the speakers of the ice cream van, and both turned to it. The man inside was extremely confused as to why this would be coming from his speaker.

"No, no, no, come on… What? We're being staked out by an ice-cream van?" Amy sighed, slightly irritated. She had so many questions to ask... for example she swore he'd said 657 years ago a few minutes ago? Why did he say that?

The Doctor ran towards the ice cream van, followed by Amy. She didn't have much of a choice but to follow him.

"What's that? Why are you playing that?" he asked, staring from the man inside to the speakers and back again.

"It's supposed to be Claire De Lune," the man said.

The Doctor picked up the player and held it to his ear. It continued the speech.

"Prisoner Zero will vacate the human residence or the human residence will be incinerated. Repeat, Prisoner Zero will vacate the human residence or the human residence will be incinerated."

Stepping away from the van, the Doctor noticed a few other people who seemed to be having a similar problem. There was a jogger with an MP3 player, and a woman with a mobile phone. Clasping Amy's hand, he entwined their fingers.

"Theta, what's happening?" Amy asked.

"Call me 'The Doctor', Amy. I'm not called Theta any more, although you can call me that when we're alone. It was my nickname at the Academy, but I'm the Doctor now," the Doctor explained.

"I liked 'Theta'," Amy said.

"Come along, Pond!" the Doctor smiled, dragging Amy with him, her letting out a shriek of surprise.

"Doctor, I am not leaping over that fence!"

"Go round the other side then!"

Amy let go of his hand and walked through the front gate of the house, whilst the Doctor vaulted the fence. She didn't know why he didn't take the easy route.

Now inside the house, they both noticed a distressed woman with a TV remote, trying to change the channels. Instead of a normal TV channel, a giant eye filled the screen, looking from side to side.

"Hello! Sorry to burst in, we're doing a special on television faults in this area," the Doctor said as he bounded into the room, followed by Amy. Then he remembered her policewoman costume. "Also, crimes. Let's have a look."

He took the remote from the woman, inspecting it closely.

"I was just about to phone. It's on every channel," the woman explained, then she noticed Amy. "Hello, Amy, dear. Are you a policewoman now?"

"Well, sometimes," Amy said.

"I thought you were a nurse," the woman replied, slightly confused.

"I can be a nurse."

"Or, actually, a nun."

"I dabble," Amy answered.

"I know you, don't I? I've seen you somewhere before," the woman said, turning to the Doctor. His brow creased.

"Not me. Brand-new face..." the Doctor stretched his mouth out, causing Amy to cringe. He certainly had changed. She didn't remember him being this weird.

"First time on," the Doctor continued, then turned to Amy. "And what sort of job's a kissogram?"

Amy blushed. "I go to parties and I kiss people," she cleared her throat. "With outfits. It's a laugh."

"Amy, are you saying that when... well, then... that that was your job?" the Doctor asked, looking hurt.

"No, no! No way! I got the job when I was 18, a year after that."

The Doctor sighed with relief. Then he turned to pick up a radio and used his sonic screwdriver on it. It said the same message about Prisoner Zero in several different languages.

"OK, so it's everywhere, in every language. They're broadcasting to the whole world," he said, dashing over to the window and opening it, stretching out to try and look towards the sky.

"What's up there? What are you looking for?" Amy questioned.

The Doctor bounded back inside. "OK, planet this size, two poles, your basic molten core... They're going to need a 40% fission blast," A young man exited from a room opposite and the Doctor rushed up to him. "But they'll have to power up first, won't they? So assuming a medium-sized starship, that's 20 minutes," the Doctor stood on tip-toes to get to the same height as the man, then back down again. "What do you think, 20 minutes? Yeah, 20 minutes. We've got 20 minutes."

"20 minutes to what?" Amy asked, a bit more snappy this time.

"Are you the Doctor?" the man asked.

"He is, isn't he? He's the Doctor! The Raggedy Doctor. All those cartoons you did when you were little. The Raggedy Doctor, it's him," the woman smiled.

Amy blushed a bright shade of red. "I know."

The Doctor turned to her, bemused. "Cartoons?"

He raced and sat down on the couch, followed by the three others.

"Gran, it's him, isn't it? It's really him!" the man exclaimed.

"Jeff, shut up!" Amy snapped, then she turned back to the Doctor. "20 minutes to what?"

"The human residence. They're not talking about your house, they're talking about the planet. Somewhere up there, there's a spaceship and it's going to incinerate the planet. 20 minutes to the end of the world," he explained seriously. He couldn't let Amy down. He had to save the world.

/\\\

Both walked fast down a street, just as a boy with a toy helicopter ran past in the opposite direction. The Doctor entwined his fingers with Amy's again, hoping that she would forgive him. Deep down Amy knew there was still love for him from that night, and she was struggling internally... should she forgive him or not?

"Amy, am I still in Leadworth?"

"Yes Theta, you are."

"Where's the rest of it?"

"This is it," Amy said.

"Is there an airport?"

Amy shook her head. "No."

"A nuclear power station?"

"No."

"Even a little one?"

"No."

"Nearest city?"

"Gloucester, half an hour by car."

"We don't have half an hour. Do we have a car?"

"No."

"Well, that's good! Fantastic, that is. 20 minutes to save the world and I've got a post office. And it's shut! WHAT is that?" the Doctor began to stride towards a small pond.

"It's a duck pond," Amy explained, following him.

"Why aren't there any ducks?"

"I don't know. There's never any ducks," Amy said, not knowing why he had a sudden interest for a random duck pond.

"Then how do you know it's a duck pond?"

"It just is. Is it important, the duck pond?" Amy said.

The Doctor stumbled to the ground, right beside the duck pond, so close to falling into it. "I don't know. Why would I know?" He clutched his chest, gritting his teeth. "I'm not ready, I'm not done yet."

The sky darkens, causing both to look up.

"What's happening? Why's it going dark?" Amy asked. Her gaze turned to the man on the ground, hoping for him to answer her.

For a moment, the sun appeared grey and flickering, before returning to normal. Now Amy really was frightened.

"So what's wrong with the sun?" she asked.

"Nothing. You're looking at it through a force-field. They've sealed off your upper atmosphere, now they're getting ready to boil the planet," the Doctor explained, leaping to his feet and frowning when he noticed local villagers taking pictures with their phones. "Oh, and here they come, the human race. The end comes, as it was always going to - down a video phone!"

"Theta, please, I'm properly scared. Are you sure this is real? It can't be – it's just some big wind-up, isn't it?"

"Amy, why would I wind you up?" he turned to her, looking her in the eye.

"You told me you had a time machine."

"And you believed me."

"Then I grew up."

The Doctor groaned. "You never want to do that! No, hang on, shut up, wait! I missed it," he smacked his forehead. "I saw it and I missed it," he smacked himself again. "What did I see? I saw... What did I see?"

He replayed everything he saw like stop-motion photography, from the chain fence, people taking photos, a woman in the phone box and then Rory, a nurse from the hospital who is facing away from the sun, taking a photo. The multi-form is there. The Doctor then "sees" the ID tag from the hospital. He looked at Rory normally before looking to a clock.

"20 minutes. I can do it. 20 minutes, the planet burns. Run to your loved ones and say goodbye, or stay and help me."

"No," Amy snapped.

"I'm sorry?"

"No!" Amy declared, grabbing him by his tie and forcing him backwards into a car.

"Amy! No! No! What are you doing?"

Once the owner walked out, she grabbed the keys from him, locking the Doctor's tie in the door.

"Are you out of your mind?"

"Who are you?" Amy asked, her glare burning through him. He thought she knew, trusted him. He thought that she believed him. But she was obviously having second thoughts.

"You know who I am."

"No, really, who are you?" Amy said, her eyes drilling into his.

"Look at the sky! End of the world, 20 minutes," the Doctor said, more seriously this time. If she didn't co-operate then the world might end, and he didn't want that to happen.

"Better talk quickly, then!"

The driver looked bewildered, standing beside his car. "Amy, I am going to need my car back."

"Yes, in a bit. Now go and have coffee," Amy replied.

"Right, yes," the driver said, promptly walking off. Amy's attention turned back to the Doctor, who's tie was still trapped in the car door.

The Doctor had a brainwave, he remembered the apple she'd given to him as a little girl. Reaching into his pocket, he felt the round shape in his hands, then pulled it out and tossed it to Amy, and with a lightning-fast reaction she caught it. "Catch."

Amy stared at the apple, the smiley face carved into it, her eyes wide. So she definitely knew that this was the man she'd met when she was a little girl... but she was also confused that he was also saying he was Theta. Before she was going to believe him, she'd need an explanation. He couldn't have possibly changed this much over the past few years... he had different colour hair, a different face, it wasn't possible. But it was those eyes. Those piercing green eyes which she loved so much. The ones which had met hers on that night, filled with lust, love and affection. They had to be the same.

"I'm the Doctor. I'm a time traveller. Everything I told you 12 years ago is true. I'm real. What's happening in the sky is real, and if you don't let me go now, everything you've ever known is over. And as for that, Amy, you said for yourself, you believed me when I told you. What more proof do you need?"

"How could've you changed so much in those few years?" Amy asked, looking from the apple into his eyes. For a moment she could see the face of the blonde teenager she'd kissed on that night.

"Amy, I'm a Time Lord," the Doctor explained. "I'm 907 years old, and we sort of change, when we die our bodies change into a new one. That was so long ago for me... I was 250 back then. I've changed a lot since then. Like I said, I'm a time traveller. Believe me, Amy, please."

"How could you be 907?" Amy's eyes stared into his, searching for the truth, an answer.

"I just am, Time Lords have a much longer life span than humans," the Doctor said.

Slowly he lifted his fingers to her temples, lightly placing the tips there. His eyes closed, and Amy felt him inside her mind. From his point of view, she saw that night, she saw them dancing... their kiss... him trailing behind her when she pulled him towards her house, all the emotions he felt. She saw them in her room... making love. Her eyes snapped open, and he withdrew his fingers from her temples.

Tightly, the Doctor gripped her wrist. Her eyes were wide, she was trying to comprehend everything that was happening. He was an alien. She'd slept with an alien.

"Just 20 minutes. Just believe me for 20 minutes.," the Doctor said, his voice calm and caring. "Amy, if I wasn't Theta, then how could I have shown you that? And the apple – fresh as the day you gave it to me. And you know it's the same one. Amy, believe for 20 minutes."

His hearts broke when he noticed a lone tear roll down her cheek. "T-Theta, I'm sorry."

"Amy, you don't need to be sorry. What is there to be sorry for?"

She promptly unlocked the car door and yanked his tie out, but before he could move he was pinned back to the car again, her body pressed against his.

"I'm sorry, I was being stupid. I just wanted to know... I was confused... I'm sorry, you probably hate me now..."

Before words could escape his mouth, her lips were pressed against his, her hands on his chest, one placed over each of his hearts. Their beating pattern became irregular quite quickly as she touched him in a way he hadn't been touched for ages. One of his hands rested on her shoulder, the other on the small of her back, closing the small distance between them.

Then he remembered. Twenty minutes.

Twenty minutes until the end of the world.

Despite how much he wanted to kiss Amy right now, the lives of all the humans on the planet were at stake. Pulling away, he reached up a hand to caress her cheek.

"Amy, we have twenty minutes."

"I know, Theta. So what do we do?"

"Stop that nurse!" the Doctor grinned, taking Amy's hand and running onto the green, where a young nurse stood with his phone. Not even bothering to inform him, the Doctor snatched the phone from the nurse's hand and stared at the screen.

"The sun's going out, and you're photographing a man and a dog. Why?"

"Amy?" the nurse said, turning to Amy.

"Hi! Oh, this is Rory, he's a... friend," Amy smiled, resting a hand on Rory's shoulder. He smiled in approval.

"Man and dog, why?" the Doctor asked, turning on his heel to face Rory.

"Oh, my God, it's him," Rory gasped, and the Doctor frowned.

"Just answer his question, please," Amy said.

"It's him, though. The Doctor. The Raggedy Doctor," Rory said, as though he could hardly believe his eyes.

"Yeah, he came back," Amy nodded.

"But he was a story. He was a game," Rory said.

Rory was cut short when the Doctor grabbed him by his shirt. "Man and dog - why? Tell me now."

It had caught him by surprise, the Doctor grabbing him, so for a second Rory was a bit dazed. "Sorry. Because he can't be there. Because he's…"

"...In a hospital, in a coma," both Rory and the Doctor said in unison.

"Yeah," Rory nodded.

"Knew it. Multi-form, you see?" the Doctor said, letting go of Rory's shirt. "Disguise itself as anything, but it needs a live feed, a psychic link with a living but dormant mind."

The multi-form snapped and snarled. It was still in the form of the man and dog. Also it seemed it hadn't quite grasped the concept of two different creatures yet...

"Prisoner Zero," the Doctor announced.

"What, there's a Prisoner Zero too?" Rory asked.

"Yes," Amy nodded.

A huge spaceship descended from the sky above them, it almost looked like a spikey-ice-crystal-spiders-web. The eye began to swivel back and forth.

The Doctor slipped the sonic screwdriver from his pocket and held it in the air. "See, that ship up there is scanning this area for non-terrestrial technology. And nothing says non-terrestrial like a sonic screwdriver."

Holding it above his head the Doctor held his finger on the button, and with a glow of the blue tip, chaos ensued. Street lights shattered, car alarms blared, sirens wailed and everyone began to shout. A fire truck drove away on its own, chased by the firemen.

"I think someone's going to notice, don't you?" the Doctor smirked, assured that his plan was going to work, that Prisoner Zero was going to be detected.

Prisoner Zero barked. The Doctor lowered the screwdriver, aiming it at the phone box, which exploded. The screwdriver itself then sparked and fizzled, causing the Doctor to drop it on the ground.

"No, no, no, don't do that!" the Doctor said, looking in despair at the tattered remains of his prise possession.

Then the ship began to head away.

"Look, it's going," Rory noted.

"No, come back, he's here! Come back! He's here, Prisoner Zero is here. Come back, he's here! Prisoner Zero is..." the Doctor called towards the ship, waving his arms in the air. But unfortunately it didn't seem to attract the ship's attention.

With a grin, Prisoner Zero melted into a nearby drain.

"Doctor! The drain. It just sort of melted and went down the drain," Amy pointed out.

"Well, of course it did," the Doctor said, as if it was the most obvious thing in the world.

"What do we do now?" she asked, looking to the Doctor for reassurance.

"It's hiding in human form. We need to drive it into the open. No TARDIS, no screwdriver, 17 minutes. Come on, think. Think!" he racked his brains, trying to think of a potential solution for the problem.

/\\\

In Leadworth Hospital, in the coma ward, a sparkling shape of Prisoner Zero's true form emerged from the vent above Barney's, the person who he took form of first, bed. It hisses and scans the room, presumably looking for a new form.

/\\\

The threesome stood above the drain which Prisoner Zero melted into. The Doctor paced around in deep thought.

"So that thing, THAT hid in my house for 12 years?" Amy asked.

"Multi-forms can live for millennia. 12 years is a pit-stop," the Doctor answered, moving to stand by her side.

"So how come you show up again on the same day that lot do? The same minute?"

Her breath hitched in her throat as she could feel his warm breath against her neck. "They're looking for him, but followed me. They saw me through the crack, got a fix. They're only late cos I am."

"What's he on about?" Rory questioned, slightly confused.

Amy missed the feeling of his breath on her neck as he quickly moved away, not wanting Rory to see. "Now, sport, give me your phone."

Rory was still intent on finding out about how the Doctor could be real... he was just a game when they were kids, right? "How can he be real? He was never real."

"Phone, now, give me!" the Doctor snapped, and Rory reluctantly gave him his phone.

"He was just a game. We were kids. You made me dress up as him," Rory said, earning a frown from Amy. She tried to hide her blush.

The Doctor looked at some photos on Rory's phone, scrolling through them with his thumb. "These are all coma patients?"

"Yeah," Rory nodded, looking over his shoulder.

"No, they're all the multi-form. Eight comas, eight disguises for Prisoner Zero," the Doctor corrected.

"He had a dog, though. There's a dog in a coma?" Amy asked the Doctor.

"The coma patient dreams he's walking a dog, Prisoner Zero gets a dog. Laptop! Your friend, what was his name? Not him, the good-looking one."

"Thanks," Rory sighed.

"Jeff," Amy responded.

"Oh, thanks," Rory sighed once more, trying to hide the fact he was quite offended.

"He had a laptop in his bag, a laptop. Big bag, big laptop, I need Jeff's laptop. You two, get to the hospital, get everyone out, clear the whole floor. Phone me when you're done," the Doctor informed them, placing a quick kiss on Amy's lips, then running off. For a moment Rory looked dazzled, was Amy hiding something? They were just friends, and he had a girlfriend, but still, she hadn't told him that she was in a relationship with her imaginary friend...

"Your car, come on," Amy said, dragging Rory by the arm towards his Mini.

"But how can he be here? How can the Doctor be here?" Rory asked her as he got in the car and closed the door, driving off towards the hospital.

Had to cut it short, I didn't have much time and I wanted to upload another chapter as quickly as possible for your benefit. This adventure concludes in the next chapter. The question is: what will happen next? Don't forget to fav/leave a review!