A/N: Hey everyone! Thank you for choosing to read my latest story! I hope that you enjoy reading it as much as I've enjoyed 'writing' it and tweaking it a little to include my OC within the Doctor's adventures with Rose et al.

Please note that I do not tolerate flaming or non-constructive criticisms when it comes to reviews. If you do not like this story after reading this first chapter, please move on. I've written this purely for fun and for the enjoyment of others. Thank you :)

I have also compiled a soundtrack of sorts for this story and its subsequent sequels. You can find it, should you like to listen to it, on Spotify under the name 'The Heart Within'.

This chapter is based around the episode 'Rose' and has been split into two parts due to how long it was when I finally finished writing it. You will find that this will be the case for the rest of the story.

I also would like to mention that I do not own Doctor Who. The geniuses behind the TV show: Sydney Newman, Donald Wilson, and C.E Webber, are the ones who claim credit and copyright. BBC also owns the rights to produce this show for viewers enjoyment. The only parts that are mine are my OC and this story.

TURN BACK TIME

"I will always have a cross to wear, but the bolt reminds me I was there. So, give me strength to face this test of mine." – Aqua: 'Turn Back Time' (Aquarium) [1997]

The Powell Estate
South London
United Kingdom

A pair of brown eyes snaps open at the sound of an alarm clock loudly blaring off in the distance, breaking the tranquil peace and quiet of the morning air. The noise is abruptly cut off, and a young brunette girl sits up in bed, yawning and looking altogether groggy and displeased about being woken up at this early hour. She throws aside her duvet and pads towards her bedroom window, pushing aside her heavy drapes to let in the light and feel the morning breeze on her hot and slightly flushed skin. A loud knock on her bedroom door causes her to jump in slight surprise.

"Katy! C'mon, move your arse! We're gonna be late!" Another girl's voice shouts to her from behind the door.

She makes a face.

"Charming, Rose." Caitlin Tyler, or Katy as she prefers to be called by her friends and family, shouts back at her sister, grumpily.

She was never really a morning person, and she seriously needed some tea. Yawning again, Katy pads towards her bedroom door and walks out to the corridor towards the bathroom to relieve herself and brush her teeth. Ten minutes later, Katy emerges from her bedroom; dressed in a pair of tight blue jeans, a purple paisley blouse and a pair of beat-up converse sneakers. Her long, light brown hair had been combed up into a high ponytail, and a simple but pretty silver locket in the shape of a heart, dangled from around her neck. It was the only possession she owned from before she was adopted by the Tylers as an abandoned newborn baby. She had been found with it, and she kept it with her always.

Rose, her older adoptive sister, barrels out of her room dressed for another shift at her job as a shopgirl, nearly colliding with Katy as she went. Both sisters pick up their wallets, keys, phone and backpacks, and Katy shrugs on her denim jacket as she watches Rose approach and kiss their mother, Jackie, goodbye.

"Bye!" Rose smiles at Jackie before heading for the front door and disappears out of it without a glance at her sister. Katy rolls her eyes and approaches Jackie, giving her a quick hug and kiss on the cheek.

"Have a good day, mum!"

"See you later!" Jackie chirped; her eyes still glued to the telly as she takes another sip from her mug of tea while lounging on the settee in her baby pink dressing gown.

Central London
United Kingdom

Katy had to jog to catch up to Rose so they could take the same bus to Central London. Katy to the Library to study for her classes, and Rose to Henricks.

"See you later, Rose!" Katy called out to her as Rose gets off the bus and crosses the street to the department store. Rose turns and waves back, a small smile on the blonde's face.

"Meet you at Trafalgar for lunch!" Rose promises before disappearing through the automatic sliding doors.

The day passes by slowly for both girls in two different locations: at Henrick's, Rose moves piles of display clothes around in the ladies' wear section. At the London Library; Katy got up from the table she was studying at to search for a book, before returning and taking notes. Rose folds some t-shirts that had been haphazardly tossed aside by a careless customer and tries to avoid the eye of a notoriously fussy customer … and fails. She gives the customer a painfully polite smile, wishing she could be anywhere but where she was, and takes the out when the floor manager darts in to take over.

At lunch, Rose and Katy meet up in Trafalgar Square and sit with Mickey Smith, Rose's boyfriend and Katy's best friend, who arrives shortly after to spend time with them before Rose has to get back to work and Katy has to continue studying. Eventually, Katy finishes for the day and makes her way back to Henricks so she and Rose can catch the bus back to South London. She only just manages to step through the sliding doors when the overhead speakers suddenly crackle to life.

"This is a customer announcement. The store will be closing in five minutes. Thank you." Katy catches the eye of the security guard who tries to stop her from walking further inside.

"I'm just waiting for my sister." She reassures him, and he nods and lowers his arm. It only takes a few minutes before she catches sight of Rose walking briskly towards the entrance with other girls. "Nice day, Rose?" She greets the tired, cranky looking blonde who opens her mouth to respond to Katy's question when she is stopped by a clear plastic bag that is thrust into her face by the same security guard that stopped Katy. Rose glowers at the guard before taking the bag and turning to run back to a lift.

Katy goes to follow.

"Oi!"

"Don't worry, she's with me!" Rose reassures the guard who frowns but nods at the girls, and Rose stabs at the button that goes to the basement. "He had to pick me. What was wrong with one of the other girls who went passed him?!" Rose bitched at Katy who shrugged sympathetically.

"Luck of the draw?"

"What's so lucky about it?" Rose retorted, sulkily.

The lift dings open and Rose and Katy step out into a basement corridor crowded with discarded and half-dressed store dummies and other bits and pieces that the store stored down there. Katy shuddered at the sight of the dummies; the ones she saw on display in the shop window never bothered her, but there was something just not quite right with these ones. Call her crazy, but she sensed something strange was about to happen. She hoped she was wrong. Rose turned left and ambled down the corridor towards a door with a large danger of electric shock sign on the front of it. There was also a sign that claimed the room to be the office of 'H.P Wilson, CEO'.

Katy raised an eyebrow at that.

"Wilson's office is a storage room?" Katy piped up, dubiously. Rose ignored her observation in favour of thudding her fist on the door.

"Wilson? Wilson, I've got the lottery money." Rose calls. There was silence for several minutes, but no one responded. "Wilson, are you there?" Rose raps her knuckles on the door again, a little impatiently. "I can't hang about 'cos they're closing up the shop." Still no response. "Wilson! Oh, come on!"

"Maybe he left already?" Katy suggested, glancing down the corridor in case Wilson suddenly showed up without Rose noticing.

"Wouldn't surprise me." Rose grimaced. There was a sudden clattering noise further down the corridor that drew the girls' attention. "Hello?" Rose starts walking towards where the noise came from, with Katy trailing along behind her, frowning a little. "Hello, Wilson, it's Rose." Still no response. "Hello? Wilson?"

Rose and Katy open the door to a storeroom and Katy flicks on the lights. There are boxes of clothes and more dressed dummies.

"Wilson? Wilson!" Rose continues calling for her absent boss. Suddenly, the door slams behind them while Rose is exploring, and Katy runs back and tugs on the door handle. But it won't open.

"You're kidding me," Katy grumbles.

"Figures." Rose agrees. There are more noises behind them, causing Rose and Katy to turn and look back nervously. "Is that someone mucking about?"

"Who's there?" Katy adds, as a nearby male shop dummy suddenly turns to watch them and then starts walking towards them. Katy laughs nervously. "Yeah, you got us. Very funny." A second dummy starts moving, then a third. Rose pulls her sister behind her to shield her protectively.

"Right, we got the joke. Whose idea was this?" Katy grabs Rose's hand as both girls start backing away; especially when more shop dummies start moving towards them slowly. "Is it Derek's? Is it?" Rose guesses, starting to get a bit anxious. "Derek, is this you?"

Katy and Rose continue backing up as more shop dummies start moving towards them, backing them into a wall. Katy jerks in alarm when a lukewarm hand suddenly grabs her wrist. She looks over to see an older man with a buzzcut and blue eyes, dressed in modern minimalist, with a t-shirt and leather jacket standing there with an excited grin on his face.

"Run." He suggests, turning and doing exactly that down a nearby service corridor, with Katy just barely snatching her sister's hand to pull her along as well. The man drags both Katy and Rose through the basement as the shop window dummies follow them, and into a lift. Both girls scream in alarm when the lead dummy puts its arm through the closing doors. But the man calmly grabs the dummy's arm and after several tugs, manages to pull it off. The door closes shortly afterwards, causing the lift to rise. Rose and Katy look at him in a bewilderment.

"You pulled his arm off." Rose stated the obvious.

"Yep. Plastic." He responds with a Northern accent. Katy grins, relief and amusement washing over her now that she and her sister were safe … for now.

"That's brilliant!" Katy complemented, earning a grin from the man.

"Who were they then, students?" He looks at Rose blankly, obviously confused about her question. "Is this a student thing or what?"

"Why would they be students?" The man asked, as though questioning her sanity.

Rose shrugged, "I don't know."

"Well, you said it. Why students?" He prodded, encouraging her to explain her theory. Katy waded in to help her sister out.

"It's a fair question. To get that many people dressed up and being silly, they must be students." Katy defended Rose's question. The man paused for a split second, mulling it over before shrugging and allowing a sunny grin to spread across his face.

"That makes sense. Well done." He complimented Rose, who smiled back.

"Thanks!"

"They're not students." His face went completely serious, and the smiles on Rose's and Katy's faces dropped. Rose recovered first.

"Well, whoever they are, when Wilson finds them, he's going to call the police." Rose felt the need to point out.

"Who's Wilson?"

"Uh, Rose's boss and the chief electrician." Katy answered, puzzled.

"Wilson's dead." The man explains, sounding rather blunt and matter of fact. Rose pales and Katy's eyes widen in shock and horror. They follow him down the corridor towards the alley behind Henrick's, and Rose recovers from her own shock to frown disapprovingly at him.

"That's just not funny. That's sick!" She snaps at him, angrily. He ignores her, pulling something long and cylindrical from one of his pockets.

"Hold on. Mind your eyes." He warns them both, and Katy glances away obediently. But Rose stubbornly continues ranting at him.

"I've had enough of this now." Rose shouts no longer amused or impressed by him, no matter how interesting the last few minutes had been for them. He raises the strange instrument towards the lift mechanism and disables it with a series of quick sparks. Katy attempts to calm Rose down.

"Rose, stop it. You're not helping the situation." She states firmly, and rolls her eyes when Rose merely glowers at her and continues to lay in on the poor man, who appeared to be indifferent to her annoyance, but Katy could tell that he was becoming somewhat irritated with her by the slight narrowing of his eyes.

"Who are you, then?" Rose demands. "Who's that lot down there?" He ignores her question, still fiddling around with something large that he had pulled from the pocket of his leather jacket, as he continues walking (or rather leading them) towards the back entrance to the alley behind Henrick's. Katy blinked in astonishment; how in the hell did that fit in there?

"No, but really. Rose has a point; who were they?" Katy questions, a little worriedly. The man decides to answer Katy's question, since it appeared to him that she was the more reasonable out of the girls, and a little quieter too.

"They're made of plastic," He replied, causing Katy and Rose to blink at the unexpected, impossible answer. "Living plastic creatures. They're being controlled by a relay device in the roof." He points towards the ceiling of the building with his free hand, while simultaneously still fiddling with the strange device in his hand. "Which would be a great big problem if I didn't have this." He holds up the thing in his hand.

"Is that a bomb?" Katy correctly guesses, surprising the man who smiles at her, looking impressed with her deduction. "Yes, it is." He confirms, and Katy smiles back. "So, I'm going to go up there and blow them up, and I might well die in the process," Katy's smile drops immediately. "But don't worry about me." He insists, as both Rose and Katy look at him like he was crazy. The latter opens her mouth to object, but he places a finger over her lips before she could speak. "No, both of you go home. Go on. Go and have your lovely beans on toast." He darts back inside the building and levels them with a stern frown. "Don't tell anyone about this, because if you do, you'll get them killed." He abruptly closes the door in their faces, before either of them could say another word.

"That was odd." Katy comments, and Rose nods in agreement before grabbing her sister's arm and tugging her to head down the alley towards the street. But before they could take a step the door reopens.

"I'm the Doctor, by the way. Who are you two?" The man, now known as the Doctor, cheerfully asks them.

"Rose."

"Caitlin."

"Nice to meet you, Rose and Caitlin." The Doctor nods at them in greeting. "Run for your lives!"

The Doctor slams the door closed again and both girls could hear his footsteps fading into the distance. Rose once again grabs Katy's arm and pulls her down the alley towards the main road, and this time Katy goes with her, but pauses momentarily to glance back at the door with a curious frown on her face. There was something oddly familiar about the Doctor, even though she had never met him before in her life. The Tyler Sisters make their way to the main road, both glancing nervously at the dummies in the shop window, and run across the road, nearly getting collected by a passing taxi.

"Watch it!" The taxi driver angrily shouts at them, but they pay him no mind.

They just make it to the other side of the street when suddenly, the entire upper floor of the department store suddenly explodes, sending a shower of broken glass and debris raining down on them. Immediately, both girls take off running down the street, passing by a bright blue, out of date police telephone box parked randomly in an alley between two other shops.

The Powell Estate
Tyler Flat
South London

Katy and Rose were slouched down on the settee, with their eyes glued to the telly as they watched BBC News 24 reporting live about the explosion that happened at Henrick's hours earlier.

"The whole of Central London has been closed off as police investigate the fire. Early reports indicate…" Katy tunes out the reporter's voice as her thoughts drift towards the mysterious Doctor, whom she and Rose had met earlier that evening. She sincerely hoped that he managed to get out of there alive before the building went up. Noise from the kitchen made Katy turn and glance towards it, to see Jackie pottering around; on the phone with one of her girlfriends as she made both Katy and Rose cups of tea.

'Think I'm gonna need something a lot stronger than that right now…' Katy thought morosely as Jackie came wondering out, droning on and on to her friend, while eying both of her daughters both curiously and with obvious relief that they were safe.

"I know. It's on the telly," Jackie was saying, and Rose rolled her eyes at her mother's words while Katy let out an exasperated sigh. "It's everywhere. They're lucky to be alive." She stated, all chatty-like. "Honestly, it's aged them." Katy gawked at her mother, slightly offended as Jackie places down their teas. But relaxes a little when Jackie winks at her, playfully. "Skin like old bibles. I swear, walking in now, you'd think they were older than me." She jokes. The front door starts rattling and Jackie briefly glances up to see who it was before rolling her own eyes and darting back towards the kitchen. "Oh, and here's himself…" Jackie's voice fades off as Mickey comes barreling into the room, looking frantic.

"Uh-oh. Here's trouble." Katy teases and grunts a little when Rose elbows her in the ribs, before giving her boyfriend a pained smile. Katy giggles: it was obvious Rose was so not in the mood for Mickey being a worrywart.

"I've been phoning your mobiles," Mickey frets perching beside Rose on the settee and immediately wrapping her into a tight hug. "You both could've been dead. It's on the news and everything."

"We know, Mick. We were there." Katy deadpans, throwing her best friend a reassuring smile. But it doesn't convince him.

"I can't believe that your shop went up!" He exclaims, and Rose bristles a little; annoyed by Mickey's smothering.

"I'm all right, honestly, I'm fine! Don't make a fuss." Rose grumbles, shoving him away a little. Mickey looks at them, expectantly.

"Well, what happened?"

"Honestly, we don't know." Katy acknowledged, calmly.

"What was it though? What caused it?" Mickey insisted.

"We weren't in the shop. We had just gotten outside, so we didn't see anything." Rose lied convincingly, and Katy winced; she hated lying at any time. But the Doctor had a point; telling anybody was likely to cause a mass riot that nobody wanted. Jackie comes wondering back into the room, holding out the phone to both girls.

"It's Debbie on the end. She knows a man on the Mirror. Five hundred quid for an interview." Jackie looked positively excited by the idea, and both Rose and Katy just looked at their mother; appalled by the idea.

'Are you for real?!' Katy thought incredulously as Rose sits up, reaching for the phone.

"Oh, that's brilliant! Give it here." Rose spits sarcastically, snatching the phone from Jackie and ending the call, slamming the phone down on the coffee table in front of them. Jackie just looks at Rose, unimpressed by her attitude.

"Well, you've got to find some way of making money." Jackie reminded her, looking cross. "Your job's kaput and your sister and I aren't bailing you out." Rose looked at Katy, feeling both embarrassed and chastised, while the brunette shrugged unsympathetically. Her younger sister worked part-time at a local café to help support herself while she studied full-time at an online university for her History Degree. The phone rings again, and Jackie instantly snatches it up and answers it eagerly.

"Bev! They're alive!" She greets her friend brightly. "I've told Rose, sue for compensation. She was within seconds of death." Jackie wonders out of the room again, and Rose scowls at the telly in annoyance. Mickey abruptly changes the subject, reaching for Rose's mug of tea and looks into it.

"What're you drinking, tea?" He continues talking before either Rose or Katy could respond. "Nah, nah, that's no good, that's no good. You're both in shock. We need something stronger." Mickey gets to his feet and starts tugging both girls to theirs. Katy looks tempted, but Rose smiles and shakes her head.

"I'm all right." She insists, while Katy smirks; realising a tad too late that Mickey probably has other reasons for wanting to head to the pub for a pint. Her suspicions are proven right when Mickey persists.

"Now, come on, you both deserve proper drinks. We're going down the pub. My treat. How about it?" He says, and Rose raises an amused eyebrow.

"Is there a match on?"

"No, I'm just thinking about you, babe." Mickey lies unconvincingly. "You and Katy." He winks at the aforementioned brunette, and she laughs sardonically.

"Yeah, sure you are." Katy drawls in amusement.

"There's a match on, ain't there." Rose agrees with Katy's comment, and Mickey deflates a little, having been caught out on his white lie.

"That's not the point," He admits sheepishly. "But we could catch the last five minutes…" He trails off, looking hopeful and Rose shakes her head and gently shoves him away.

"Go on, then. We're fine, aren't we?" Rose looks over at Katy who nods and gets to her feet, to give Mickey a friendly hug, appreciative of the concern he had shown them. "Go. Get rid of that." Rose insists and tosses her boyfriend the plastic dummy's arm that the Doctor had ripped off back at Henricks. Mickey steps back from returning Katy's hug and catches the arm. He leans in and chastely kisses Rose before turning and heading for the door.

"Bye, bye." Mickey says, using the arm to wave goodbye.

"Bye!" Both Katy and Rose responded back, and roll their eyes when Mickey pretends to strangle himself with the arm before going. Katy retakes her seat beside Rose, curling one leg underneath her as she got comfortable and returned her attention back to the telly, turning up the volume so she and Rose could hear it better.

"…. Fire then spread throughout the store. Fifteen fire crews are in attendance though it's thought there is very little chance of saving the infrastructure…"

Next morning

Katy flinches when Rose's alarm clock suddenly goes off in the room adjacent to hers, before abruptly switching off. Yawning, she sits up; in time to hear Jackie yelling down the hall to Rose:

"There's no point in getting up, sweetheart. You've got no job to go to." She reminds her eldest, and Katy chuckled sleepily, imagining Rose probably groaning and flopping back into her pillow. Her best guess was that Rose would probably roll over and grab a couple more hours of sleep. She, on the other hand, did have a job to go this morning. Grabbing a handful of her duvet, Katy tossed it aside and headed down the corridor to attend to her morning routine.

Twenty minutes later, she kisses Jackie good morning and goodbye and heads out of the door, on her way to the café for her shift.

Lunchtime

Five hours later, Katy, finished with her shift for the day, hops off the bus and heads across the Powell Estate courtyard towards the staircase, carrying a large takeaway cup of Hot Chocolate in one hand, and her flat keys in the other. She makes it about halfway up the stairs, when she accidentally thuds straight into … the Doctor?

"Wah…?" She gapes unattractively at the mysterious man, as he grabs one of her upper arms to steady her, so she didn't take a tumble back down the stairs, while carrying a lifeless, immobile plastic dummy's arm in the other hand. Katy frowns at it in confusion.

'Didn't Mickey throw that thing out?' The Doctor smiles cheerfully at her.

"Hello, Caitlin. Nice to see you again!" He greets her, before gently shifting her to one side and continuing down the staircase. Katy watches him go, as Rose suddenly comes out of nowhere, thundering down the staircase after him. Katy quickly gives chase.

"Hold on a minute. You can't just go swanning off." Rose protests at the Doctor, who continues walking as though he hadn't heard what she said.

"Yes, I can," He retorts. "Here I am. This is me, swanning off." He makes it to the bottom of the staircase and pushes open the glass door, turning and looking pointedly at Rose. "See you." He momentarily catches Katy's eye and smiles brightly at her before sauntering off, letting the glass door nearly smack Rose in the face when he let it go. Katy blinks at him in a bewilderment, before addressing Rose.

"What's going on? What's he doing here?" She demands, and Rose doesn't reply; still determined to get a straight answer out of the Doctor who was almost out of sight of the both of them. The girls had to run to catch up with the Doctor and his long legs outside the block of flats that made up the Powell Estate.

"But that arm was moving. It tried to kill me." Rose argued when they both finally caught up with the Doctor, and Katy's eyes widened.

"Ten out of ten for observation." The Doctor responded dismissively, increasing his speed a little more, but Rose and Katy were fitter than they looked and were easily able to keep up with him.

"You can't just walk away. That's not fair." Rose insisted, getting a little impatient with him. "You've got to tell me what's going on." Katy frowned at the back of her sister's head, feeling defensive on the Doctor's behalf. Sometimes, Rose could be a little too nosy and pushy for her own good. It was not exactly one of her good traits.

'Who says he does?' She thought, and apparently the Doctor agreed with her.

"No, I don't."

They were about halfway up the laneway, when Rose finally lost her temper and shouted at the Doctor in annoyance.

"All right, then. I'll go to the police. I'll tell everyone." Rose threatened and the Doctor stopped walking, and turned to look at her no longer looking cheerful, in fact he looked a little like a cornered wild animal, and it made Katy take an uncertain step away from him; suddenly feeling a little unsafe. Rose continued on, oblivious. "You said, if we did that, we'd get people killed." She indicated towards Katy, who immediately protested.

"Hey! Don't bring me into this." She growled, already feeling tired of the day and it was only lunchtime. Rose ignored her.

"So, your choice. Tell me, or I'll start talking." Rose demanded, and Katy sighed exasperatedly.

"Rose…" Katy groaned, tiredly. The Doctor didn't say anything for a moment, in fact he looked rather unimpressed and even more unintimidated by Rose's threat.

"Is that supposed to sound tough?" He questioned.

"Sort of." Rose shrugged.

"Doesn't work." The Doctor sneered, before turning on his heel and continuing to walk on. Rose let out a frustrated noise underneath her breath. But Katy also had a question burning within her, and she jogged over, falling into step beside him. The Doctor, at first, tensed up. But when he saw who it was out the corner of his eye, he relaxed a little. At least it was the quieter, reasonable one who was still following him.

"Who are you?" Katy asked him, curiously. Rose fell into step beside her sister, also curious about who this man really was. The Doctor rolled his eyes.

"I told you. The Doctor."

Katy smiled, "Yeah. But Doctor what?"

"Just the Doctor." He insisted, smiling a little. A smile that dropped when Rose suddenly piped up again.

"The Doctor." Rose repeated dubiously.

"Hello!"

"Is that supposed to sound impressive?" Katy smirked playfully, throwing back his own words at him. The Doctor started, a little taken aback by the girl's cheekiness, but instead of getting annoyed like he would've if Rose had given him cheek, he returned the smirk and shrugged nonchalantly.

"Sort of." Katy grinned triumphantly. She knew there was a sense of humour buried somewhere within this rather too serious guy, and she was pleased some of it managed to slip out … even if it was only a tiny bit.

"Come on, then. You can tell us. We've seen enough. Are you the police?" Rose asked, and the Doctor sighed heavily, deciding to humour them. Maybe if he answered their questions, they'll go away and get on with their mundane little human lives and let him get on with his.

"No, I was just passing through. I'm a long way from home." He responded, rather reluctantly.

"But what have we done wrong? How come those plastic things keep coming after us?" Rose insisted, and again the Doctor narrows his eyes at her.

"Oh, suddenly the entire world revolves around you." He mocks them, and Katy immediately turned on her sister.

"Once again, Rose, don't drag me into this." Katy hissed. The Doctor shook his head feeling somewhat mystified by these two VERY different girls.

"You were just an accident," He explained. "You got in the way, that's all."

"It tried to kill me."

"It was after me, not you." The Doctor insisted. "Last night, in the shop, I was there, both of you blundered in, almost ruined the whole thing." Katy and Rose frowned at him, annoyed that they were being scolded for something that wasn't even their fault in the first place. It could've been anybody who'd have stumbled into that situation last night … and he was having a go at them? "This morning, I was tracking it down, it was tracking me down. The only reason it fixed onto you, Rose, is 'cos you've met me."

"So, what you're saying is, the entire world revolves around you?" Rose summarised, and the Doctor smiled enthusiastically.

"Sort of, yeah."

"You're so full of it." Katy let out a disbelieving snort. Again, the Doctor nodded in agreement.

"Sort of, yeah."

"And so modest too…" Katy muttered sarcastically underneath her breath, but the Doctor's sharp hearing picked it up and he grinned harder at what he considered a complement. Rose impatiently interjected, still like a dog with a chew toy about all of this.

"But all this plastic stuff. Who knows about it?"

"No one." The Doctor replied, and the slightly flirty smirk dropped from Katy's face when she realised what he was implying.

"What, you're on your own?" Rose sounded surprised, and the Doctor immediately shut down when he saw the look of sympathy on Katy's face, and he frowned resentfully and turned away.

"Well, who else is there? I mean, you lot, all you do is eat chips, go to bed, and watch telly, while all the time, underneath you, there's a war going on." The Doctor explained, sounding rather defensive. Rose and Katy exchanged glances with each other before turning back to the Doctor, ready for an explanation into what he meant. Rose folded her arms across her chest, which was an indication that she meant business.

"Okay. Start at the beginning." She requested, and the Doctor raised an eyebrow at her. "I mean, if we're going to go with the living plastic, and I don't even believe that." Rose explained, and the Doctor looked over at Katy quizzically.

"Do you?"

"Not really." Katy admitted.

"…but if we do, how did you kill it?" Rose continued, bringing the Doctor's attention back on to her.

"The thing controlling it projects life into the arm," The Doctor lifts the inactive arm he was carrying into the air for emphasis, before continuing with the explanation. "I cut off the signal, dead."

"So that's radio control?" Katy asked, looking both concerned and curious about the Doctor's impossible explanation. He shook his head.

"Thought control," He corrected, then studied both girls with mild concern. "Are you all right?"

"Yeah," Rose replied a little too quickly.

"I'm good." Katy reassures with a weak smile.

"So, who's controlling it, then?" Rose asked. The Doctor wasn't entirely convinced that they were completely telling him the truth that they were fine about all of this. He was pretty sure that once they were alone, they'd probably start freaking out when all the information he was giving them finally hit them … and overwhelmed them.

"Long story." He eventually said.

"But what's it all for?" Katy frowned at the Doctor. "I mean, shop window dummies, what's that about? Is someone trying to take over Britain's shops?"

"No."

"No?" Rose furrowed her brow, looking skeptical. The Doctor sighed, trying to keep his patience and explain this in a way that both of them would be able to understand with their 'primitive ape brains.'

"It's not a price war. They want to overthrow the human race and destroy you. Do you believe me?" He asked, slightly curious.

"No." Rose shook her head, not convinced.

"Yes." Katy answered, earning a disbelieving look from Rose. "What? What other explanation could there possibly be that could make sense of all of this, Rosie?" That earned her a glare from her sister, who hated the nickname. Which was exactly why Katy continued to call her that because it got a reaction outta Rose.

"Because it doesn't make sense?" Rose retorted, like it should've been obvious. The Doctor grinned.

"But you're still listening." He pointed out to Rose who was momentarily silenced when she realised, he was right.

"Really, though, Doctor. Tell us, who are you?" Rose insisted. Katy nodded, also curious about the strange, mysterious and admittedly fascinating man standing before her sister and herself, sticking out like a sore thumb and holding a white plastic dummy's arm while fixing them with a stoic look with his unblinking blue eyes.

"Do you know like we were saying about the Earth revolving?" The girls nodded. "It's like when you were a kid. The first time they tell you the world's turning, and you just can't quite believe it because everything looks like it's standing still." More nods, and a slightly suspicious look from Rose. "I can feel it. The turn of the Earth," The Doctor reaches out and grabs Katy's hand. She gasps when there was a random zap of what she thought was static electricity shooting up the nerves of her arm the second he touched her, and she glances down at his hand and back at his face in surprise, questioning if he felt it too. By the slight narrowing of his eyes and the way he lightly squeezed her hand, told her he did. "The ground beneath our feet is spinning at a thousand miles an hour, and the entire planet is hurtling round the sun at sixty-seven thousand miles an hour, and I can feel it. We're falling through space, you and me, clinging to the skin of this tiny little world, and if we let go…" The Doctor releases Katy's hand, letting it thud against her thigh. "That's who I am."

Katy was spellbound by the explanation the Doctor had just given them about who he was. He was an enigma she wanted to solve. The Doctor narrowed his eyes sternly at them.

"Now, forget me, Rose Tyler. Caitlin Tyler. Go home." He orders them, before turning and walking off hurriedly with the arm. Rose turns and goes to walk back to their flat, and Katy follows, feeling puzzled. But there was a rush of air and a strange sound that sounded like a combination of groaning, wheezing and heavy chains being dragged across the ground, that made them turn and run back to look for the source of the noise.

But the Doctor had disappeared without a trace.

The Tyler's Flat
Powell Estate
South London

While it was indeed true that the Doctor was a truly fascinating enigma that she wanted to investigate further, Katy also knew when to quit while she was a head. It was obvious, even to Blind Freddie down the street, that the Doctor wished to remain anonymous and even more, left alone. And Katy wanted to respect his wishes, despite every instinct she possessed wanting her to do the exact opposite. However, Rose, unfortunately, wasn't as convinced. She wanted to know more.

"Rose! Just drop it, will you!? Leave him be." Katy had insisted, annoyed and strangely protective of him, for some reason.

"Oh, c'mon, Katy! You can't tell me you ain't dead curious?" Rose wheedled, looking at her sister pleadingly.

Sometime after their conversation with the Doctor after he had rescued Rose from being strangled to death by a plastic dummy's arm, and warned them off trying to find him again, Rose decided to go to Mickey's flat to use his computer, so she could see if there was any information she could look up on the net that related to the Doctor. Katy opted out; she had a ton of study to do. But as it turned out, Rose had stumbled upon a website belonging to a man named Clive, who sought out people who had seen or met the Doctor. Naturally, she wanted to follow up this clue … and wanted to drag Katy along with her as well.

Katy let out a heavy, resigned sigh.

"Of course. But just because we can, doesn't mean we should." She pointed out, looking up from the essay she was working on, where she was sitting at the kitchen table surrounded by papers, textbooks and a discarded mug of lukewarm tea that she had been nursing when Jackie had made it for her and left her to it. She scowled at her sister's 'puppy-dog' expression that she was aiming at her from the chair she was sitting at beside her.

"Geez! Where's your sense of adventure?" Rose griped, sounding disappointed.

"It died. Probably around the time I started studying for this course." Katy retorted, muttering underneath her breath as she scratched away a note on her page, so she didn't lose track of her thoughts. Rose promptly reached over and plucked the pen from Katy's grasp, much to the brunette's protesting. "Rose, c'mon. I gotta finish this." She complained, grabbing for the pen that Rose held out of her reach, stubbornly.

"C'mon. Live a little. You might regret it if you don't." Rose pleaded, and Katy paused for a moment, chewing on her bottom lip as she allowed herself to think about it for a moment. As much as Rose had a valid point; at the same time, this so-called clue she discovered could be a whole lot of crap and they'd be back to square one.

But damn it was tempting…

"Alright, fine. I give!" Katy caved, and Rose all but did a little dance in her seat, looking triumphant and just a bit smug that she had gotten her way. "If you give me an hour to finish this, then we can go check this guy out. Okay?"

"Deal!" Rose practically sprang to her feet and bounced her way down the hallway towards her bedroom. "Don't know why you're stressing' about that essay. You already know you're gonna ace it. You always do." Rose yelled down the corridor. Katy groaned and let her head thud against the kitchen table.

"Calm blue ocean… calm blue ocean…" She chanted underneath her breath, as she prayed for serenity.

Clive's street

Katy sat quietly in the back of Mickey's yellow VW beetle, staring boredly out the window at the neighbourhood racing past in a slight blur. She kept her word, and about an hour and a half later, she and Rose were on their way to this Clive guy's flat to talk about the Doctor. Rose had somehow roped Mickey into giving them a lift there, and understandably he was very reluctant to. He turned down an ordinary street and parked across from a modest little flat with a pretty garden with sprays of flowers growing in front of it. A couple of black wheelie bins were parked on the nature strip out on the street.

"You're not coming in," Rose was saying to Mickey who looked at Rose like she was nuts. Katy couldn't say she didn't agree with him. "He's safe. He's got a wife and kids." Rose gets out of the car and flips forward the seat so Katy could climb out herself.

Mickey scoffed disbelievingly.

"Yeah, who told you that? He did. That's exactly what an internet lunatic murderer would say," He protested, and Katy rolled her eyes.

"Mick, just chill, will ya? You're making it out to be worse than it probably is." Katy scolded him, eying off one of Clive's neighbours who was wheeling out his black wheelie bin to the curb. He pauses and gives Mickey a nasty look. "You gotta problem there, mate?" She called out to him, scowling, and the guy looks her up and down, sniffs disapprovingly and turns to go back inside. "Nice chatting with ya!" Katy rebukes sarcastically.

"Let's go." Rose said, thumbing over her shoulder towards the nearby house. She knocks on the door, and a boy of about twelve opens it, carrying a basketball underneath his arm. He looks at them warily. "Hello, we've come to see Clive?" Rose gestures between herself and Katy, who gives the kid a curt wave. "We've been emailing." The boy's face immediately drops, like he's used to his dad's idiosyncrasies and turns to yell into the house.

"Dad! It's two of your nutters!" He scowls at them mistrustfully and disappears somewhere into the house.

"Charming," Katy mutters as a man who looks like the stereotypical couch potato comes to the door, carrying a tea-towel in his hand. He smiles politely at them.

"Oh, sorry. Hello. You must be Rose?" Clive looks at Katy inquiringly, and Rose raises a hand.

"That's me. This is my sister, Caitlin."

"Hi." Katy greets him. Clive smiles back in acknowledgement and extends a hand to both to shake.

"I'm Clive, obviously." The three of them shakes hands, before Rose turns and gestures to the yellow beetle outside, idling in the sunshine with a suspicious Mickey watching them from the driver's seat.

"I'd better tell you now. My boyfriend's waiting in the car, just in case you're going to kill us." Rose says, apologetically.

"No, good point. No murders." Clive nods and waves at Mickey, not at all offended.

"Who is it?" A woman, obviously Clive's wife, calls out from somewhere upstairs. He turns and yells back.

"Oh, it's something to do with the Doctor. They've been reading the website." Clive steps aside to let Rose and Katy in. "Please, come through. I'm in the shed." He gestures for them to go past as Clive's wife, Caroline, bounds down the staircase carrying a laundry basket underneath her arm.

"They? They've read a website about the Doctor? Who's they?" She ponders as she closes the front door.

Clive's Shed

'Geez, Rose… what have you gotten me into this time?' Katy thought disbelievingly as she and Rose walked into Clive's shed. It was filled from floor to ceiling with what looked like conspiracy-type documents and other weird paraphernalia.

Including blurred out pictures of the Doctor.

"A lot of this stuff's quite sensitive. I couldn't just send it to you." Clive was explaining to Rose, who nodded looking just as uncertain as Katy did as she looked about the room too. "People might intercept it, if you know what I mean." Katy wondered over to a cork board against the wall, looking at a picture of a blue spiraling galaxy of stars, letting Clive's voice sort of fade into the background as she continued 'being nosy'. "If you dig deep enough and keep a lively mind, this Doctor keeps cropping up all over the place. Political diaries, conspiracy theories…" Katy snorted at that one, and grunted a little when Rose elbowed her in the ribs. "…even ghost stories." Clive continued, apparently not hearing Katy's skepticism. "No first name, no last name, just 'the Doctor'. Always The Doctor. And the title seems to have been passed down from father to son. It appears to be an inheritance."

Clive hands the blurred picture of the Doctor to Rose who looks down at it, curiously.

"That's your Doctor there, isn't it?" Clive guessed, pointing towards the picture. Katy stopped rubbernecking around the room and came over to look over Rose's shoulder at the picture.

"Yep, that's him." Katy confirmed. She couldn't mistake those baby blues for anything else. Clive walked over to some nearby manilla folders and started rifling through them, as Rose continued studying the picture.

"I tracked it down to the Washington public archive just last year. The online photo's enhanced, but if we look at the original…" Clive passes Rose the 'original' which turned out to be a picture of JFK's cortege going through Dallas, Texas. The Doctor is just one face in the crowd.

Katy's eyes widened in surprise.

"Woah…" She muttered. That couldn't be possible. The Doctor hadn't looked like he'd aged a day!

"November the 22nd, 1963. The—"

"Assassination of President Kennedy." Katy finished, frowning slightly. Clive beamed at her, impressed, but Katy barely acknowledged it. Rose barely reacted beyond a simple raise of her eyebrow.

"It must be his father." She decided, and Clive passed her a heavy looking book, opened to a page that had an old-fashioned photo of a family in Georgian attire. A very familiar man was posed beside the family, also dressed in Georgian attire.

"Going further back. April 1912. This is a photo of the Daniels family of Southampton, and friend. This was taken the day before they were due to sail off for the New World on the Titanic, and for some unknown reason, they cancelled the trip and survived." Clive explains to them, and Katy was starting to feel a bit uncomfortable. "And here we are. 1883. Another Doctor." Clive was showing them a sketch of a beach with a lush, green jungle and an erupting volcano in the background. The Doctor was there, clear as day, standing beside a strangely familiar blue box, with his hand buried deep in the pockets of his black leather jacket.

Katy could just picture a great big, sunny smile on his face.

'Who the hell are you, Doctor?' Katy questioned uneasily in her head, as Clive went on and on.

"…the same lineage. It's identical. This one washed up on the coast of Sumatra on the very day Krakatoa exploded. The Doctor is a legend woven throughout history. When disaster comes, he's there. He brings the storm in his wake, and he has one constant companion." Clive sounded very ominous, and both Rose and Katy looked at him warily.

"Who's that?" asked Rose, and Clive stared at them solemnly.

"Death."

'No shit…' Katy scoffed, wanting very much to leave before any of this got any stranger that it already was. It wasn't that she didn't believe Clive. Everything he told them did sound a little unbelievable; but for some reason, Katy's instincts were telling her it was all very true. And she tended to follow those instincts to the tee. They hadn't failed her yet.

"If he's singled you out, both of you. If the Doctor's making house calls, then God help you." Clive warned them, seriously.

Rose frowned.

"But who is he? Who do you think he is?" She asked, obviously hopeful that Clive had the answer she was seeking.

"I think he's the same man. I think he's immortal." Clive said, and Katy eyed him carefully. "I think he's an alien from another world." The second Clive said the word 'alien', Rose's hopeful expression evaporated faster than water in the middle of the Sahara Desert, and she looked disappointed and skeptical. But Katy felt like somebody had walked right over her grave … and she had no idea why.

Katy trailed behind Rose back to Mickey's car, lost in thought after they politely thanked Clive for sharing what he knew about the Doctor, and made their way back out into the street. It was approaching dusk, and the late sunshine was casting shadows on the narrow street. Rose immediately yanked open the passenger door, and impatiently waved Katy inside before getting in herself and turned to rant at Mickey.

"All right, he's a nutter. Off his head. Complete online conspiracy freak. You win!" She told Mickey, who surprisingly hadn't been all over Rose like a rash, checking her over to see that Clive hadn't hurt her in any way like he would normally do. Katy reached up and started clutching her locket; a habit she'd picked up whenever she felt troubled and uneasy about something. It was soothing in a way, giving her a feeling of comfort when she needed it. "What are we going to do tonight?" Rose questioned out loud. "I fancy a pizza."

"Pizza! P-p-p-pizza!" Mickey started chanting, and Katy glanced over to look at him strangely. And froze. There was something very wrong right now, and Katy had a feeling it had something to do with their designated driver.

Katy sat forward and took a good look at Mickey, who was still chanting the word 'pizza' like he was only just learning how to speak for the very first time. That was when she noticed that he looked shinier than normal; like he had slathered on a thick layer of oil on his skin just for the hell of it, and his hair was flatter on his head than usual. Naturally, for some reason, Rose was completely oblivious.

"…or Chinese." She was still deciding what she wanted for supper. Rose turned and looked at her sister. "You wanna come eat with us? Or do you want us to drop you home?" She asked, then frowned at the disturbed expression on Katy's face. "You alright?"

Katy snapped out of her thoughts, "Fine. Why?"

"You're playing with your locket. You only do that when you're upset about something." Rose pointed out, and Katy immediately let go of her locket and sat back in her seat.

"It's nothing," She lied, still surreptitiously glancing at Mickey with caution. "Just thinking about what Clive told us about the Doctor." Katy told a half-truth, and Rose nodded understandingly.

"Yeah, he was a little weird," She agreed. "So, are you coming with or not?"

"If you don't mind some company, I'll come." Katy agreed, partly because she was hungry, and to keep an eye on Mickey and protect Rose if the need came.

"Great! Let's go then." Rose announces and 'Mickey' drives off down the road.

A/N: Stay tuned for part two.