A/N: Welcome back! Please enjoy this new chapter update :)

I do not own Doctor Who. All I own is my OC and this story. Please review! No flaming will be tolerated ;)

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ON TOP OF THE WORLD

"I've tried to cut these corners. Try to take the easy way out. I kept on falling short of something. I coulda gave up then, but then again I couldn't have 'cause I've travelled all this way for something." – Imagine Dragons: 'On Top of the World' (Night Visions [2012])

The Tyler's Kitchen

The minute they walked into the kitchen, Mickey started ranting, uncaring that there was a whole room of nosey neighbours and family friends next door who could probably hear everything that he was saying. Rose was leaning against the counter, looking ashamed, while Katy was leaning against the counter near the mug cupboard, looking awkward and like she wanted to be anywhere else but near this one-sided domestic spat between a boyfriend and girlfriend.

"You disappear, with Katy, who do they turn to? Your boyfriend!" Mickey spat angrily. "Five times I was taken in for questioning. Five times. No evidence. Course, there couldn't be, could there?" Rose looks down at her feet, biting her top lip. "And then I get her," Mickey points out at Jackie who was hovering nearby, eavesdropping on the conversation because it had something to do with the Doctor. "Your mother, whispering around the estate, pointing the finger. Stuff through my letterbox, and all 'cos of you." Mickey was practically fuming. This was obviously a long time coming.

"I didn't think I'd be gone so long." Rose replied sounding meek.

"And I waited for you, Rose. Twelve months, waiting for you, Katy and the Doctor to come back." Mickey continued ranting, before Rose's head shot up and she scowled at him when something occurred to her.

"Hang on, why are you just going off on me? Katy was missing for a whole year too!" Rose pointed out, earning a look of outrage from her sister.

"Hey! Don't bring me into this! He's your boyfriend!" Katy protested.

"Yeah, and he's your best friend. Doesn't that make any difference?" Rose retorts, obviously not wanting to be the only person stuck in the doghouse with Mickey. Then Jackie suddenly chimes in, having heard the last thing Mickey had said, and was glowering at him accusingly.

"Hold up. You knew about the Doctor? Why didn't you tell me?" Jackie questioned Mickey, who realises the serving hatch was open, and promptly closes it on Jackie and turns back to the girls.

"Yeah, yeah. Why not, Rose? Huh?" Mickey continued, ignoring her question about Katy, which the girl was grateful for. "How could I tell her where you went?" He demanded. But Jackie comes into the kitchen, still demanding answers from Mickey.

"Tell me now." She orders Mickey, who deflates a little before remembering why Jackie was asking him this question and aiming his hurt glare at Rose.

"I might as well, 'cos you're stuck here." Mickey points out, aiming to hurt his girlfriend. Katy's eyes widen when she cottons on to what Mickey meant, and she goes to the window that overlooks the courtyard and reacts in horror when she sees that the TARDIS is no longer where she was standing in the courtyard. "The Doctor's gone. Just now. That box thing just faded away." Mickey's words resonate in Katy's head and she immediately scowls in anger.

"Oh, that sneaky, lying son-of-a-bitch!" Katy seethes, as Rose looks at Mickey blankly, having not caught on as quickly as Katy did.

"What do you mean?" She asks, suddenly very quiet.

"He's left you. Some boyfriend he turned out to be." Mickey explained, sounding rather smug. Katy then promptly rushes out of the flat, with Rose rushing after her.

Mickey follows them.

Powell Estate Courtyard

Katy storms out onto the courtyard, ready to lay into the Doctor the very minute he reappeared with the TARDIS, as Rose continued protesting vehemently behind her, making excuses for the Doctor's sudden disappearing act.

"He wouldn't just go, he promised us." Rose insisted, as Katy stood waiting impatiently with her arms clamped across her chest for the TARDIS to rematerialise. But Mickey seemed convinced that the Doctor had gone and done a bunk on them, much to Katy's irritation. His obvious dislike of the Doctor was starting to get on her nerves.

"Oh, he's dumped you, Rose. Sailed off into space. How does it feel, huh?" Mickey taunted somewhat childishly. "Now you are left behind with the rest of us Earthlings. Get used to it." He said scornfully.

"Oi! It's not just me he's left behind you know." Rose indicated to an increasingly impatient and irritated Katy. "You're forgetting Katy was traveling with him too!"

"Yeah, that seems to be an occurring theme, right about now." Katy muttered bitterly.

"And anyway, he would've said." Rose continues ranting, as though Katy hadn't spoken up. Jackie comes running down from the stairwell, having followed them after learning that even Mickey knew about the Doctor.

"What're you three chimps going on about?" Jackie demanded, also sounding somewhat irritated. "What's going on? What's this Doctor done now?" Mickey was extremely triumphant, probably believing he had one-upped the Doctor somehow.

"Ho, ho, ho. He's vamoosed!"

"He's not, because he gave Katy and me this." Rose holds up her TARDIS key for her mother and Mickey to see. Then scowls at Mickey in annoyance. "He's not my boyfriend, Mickey. He's better than that. He's much more important than—"

"OW!" Katy jerks like she had been stung by a bee, and flings away the offending object; which turned out to be her TARDIS key, which was glowing. She looks up from the key as the TARDIS herself starts materialising where she had been parked the last time in front of the closed shop. A determined look appears on her face, as she bends down and picks up the key and stomps over, ready to unleash hell on the Doctor when the TARDIS finished materialising.

"I said so!" Rose crows triumphantly, then realises that Jackie was still outside about to see everything. She starts shoving her mother back towards the stairwell. "Mum! Mum, go inside." Jackie just looks at her strangely, while the familiar noises of the materialising TARDIS increases in volume, causing her to look around in confusion. Rose increases her efforts to prevent her mother from seeing. "Mum, don't just stand there, just go inside. Just, Mum, go." But it's too late, the TARDIS has already reappeared. Rose groans. "Oh, blimey…" Mickey and Jackie blink at the TARDIS in astonishment.

"Huh?"

"How'd you do that, then?" Jackie wonders, as she walks over to investigate the TARDIS. Katy had already beaten them to it, and bursts inside.

The TARDIS
Console Room

The TARDIS doors open, admitting Katy who storms up the metal grating runway directly towards the Doctor, who was oblivious to Katy's ire, and dashing around the console adjusting. Jackie and Mickey come inside, followed by a sheepish Rose and both marvel at the interior of the TARDIS as the Doctor begins speaking, aware that his companions have walked in.

"All right, so I lied." The Doctor began his rather pathetic apology. "I went and had a look." He admits, distractedly. "But the whole crash landing's a fake. I thought so. Just too perfect. I mean, hitting Big Ben. Come on, so I thought let's go and have a look—" He is cut off when Katy swings and hits him hard on the arm, making him jerk in surprise then indignation. "Oi! What was that for?"

"You lied and left without us!" Katy accused.

"I said I was sorry!" the Doctor protested his innocence, and Katy just gave him a look.

"Admitting that you lied and went to investigate without us is apologising is it? Really, Doctor, do I look like an idiot to you?" Katy spat, and the Doctor continued scowling at her, before looking over at Rose who had an apologetic expression on her own face.

"What?"

"My mum's here." Rose admits, and Katy groans realising that Rose was right. The Doctor's scowl deepened.

"Oh, that's just what I need." He groused. "Don't you two dare make this place domestic." The Doctor warned, as Mickey glares at him and storms over to him.

"You ruined my life, Doctor. They thought they were dead. I was a murder suspect because of you!" Mickey accused, and the Doctor groaned and looked at both Katy and Rose in annoyance.

"You see what I mean? Domestic."

"I bet you don't even remember my name." Mickey challenged.

"Ricky." The Doctor responded, carelessly.

"It's Mickey."

"No, it's Ricky." The Doctor corrected him, knowing full well what Mickey's name was, and not particularly caring.

"I think I know my own name." Mickey groused, resentful.

"You think you know your own name? How stupid are you?" The Doctor was mocking, and Katy immediately stepped in.

"Doctor, knock it off. Leave him alone." She snapped, and Mickey threw her a grateful look. Meanwhile, Jackie was shocked and frightened by the TARDIS and her infinite size and immediately turns to run out of the ship. Rose follows her.

"Mum, don't!" She turns and scowls at the Doctor, just as angry and hurt as Katy was when she realised the Doctor had disappeared on them. "Don't go anywhere, and don't start a fight!"

Powell Estate Courtyard

Jackie runs out of the TARDIS's double doors and turns to look at the deceptively small Blue Box, and how impossible she really was. Jackie cups her mouth in horror and frightened tears well up in her eyes before she turns and runs for the stairwell, just as Rose comes out after her.

"Mum, it's not like that." Rose stammered, trying to help Jackie understand what she had just seen. "He's not—" She breaks off, realising exactly what the Doctor had just said about the spaceship and wanted clarification. She turns back to yell at Jackie's retreating back. "I'll be up in a minute. Hold on!"

She disappears back inside the TARDIS.

The Console Room

Rose runs back up the runway, looking at the Doctor with a perplexed look.

"That was a real spaceship." She asks for confirmation, which the Doctor gives.

"Yep."

"So it's all a pack of lies?" Katy concludes, her temper simmering down now that she was back in the TARDIS and she had seen that the Doctor had a legitimate excuse for abandoning them in the first place. "What is it, then? Are they invading?" She asked, and Mickey frowned also looking a bit confused himself, despite his anger towards the Doctor and the entire situation he had been unceremoniously brought into by a distraught Jackie.

"Funny way to invade, putting the world on red alert." He pointed out, and the Doctor nodded in agreement.

"Good point!" He said, much to Mickey's surprise that the Doctor acknowledged what he said without scorn or ridicule. "So, what're they up to?"

Jackie's bedroom
The Tyler Flat

Jackie rushes back into the flat and without saying a word to any of her friends, which most felt was a bit odd, even for her, makes a beeline for her room, shutting the door behind her. She immediately clicks on her telly, and turns it directly onto News 24, this time taking what was being broadcast seriously.

"As the crisis continues and the government shows remarkable lack of leadership, paranoia sweeps the country. There've been at least three reports of public assaults on people falsely identified as aliens. Now back to Tom Hitchinson." Jackie was barely paying attention despite having turned the telly on, too wrapped up in her thoughts. Was the Doctor dangerous? Did he somehow brainwash her daughters into coming with him on his weird spaceship? Her attention is caught by Tom Hitchinson who has a grim, serious look on his face.

"Are there more ships to come? And what is their intention?" Jackie takes a seat on her unmade bed, still lost in her frantic thoughts. Then something that Tom Hitchinson says, grabs her attention almost immediately. "The authorities are now asking if anyone knows anything. If any previous sightings has been made, then call this number. We need your help." A hotline number appears on the bottom of the screen, and Jackie in her determination to protect her daughters from the Doctor, snatches up her bedside phone and quickly dials 08081 570980. She checks the time on her digital clock radio: it reads 23:08. She groans in frustration when she gets the busy tone twice. Clearly, a lot of people had seen aliens, and now the line was tied up.

"Tonight, the London Institute of Psychology is warning that incidents of violence—" Jackie reacts with triumph when her call is put through.

"Yes, I've seen one. I really have. An alien. And they're with him; my daughters, they're with him. And they're not safe." Jackie draws in a deep breath, trying to calm herself down. "Oh, my God. They're not safe. I've seen an alien, and I know his name. He's called the Doctor." She shouts down the phone, and unbeknownst to her, Jackie's phone call; however innocent it appeared to be, triggers a Red Alert. Especially when she adds: "It's a box. A blue box. She called it a TARDIS."

It is official. The Government were now aware that the Doctor is here in London.

The TARDIS
Console Room

The Doctor, Katy, Rose and Mickey are still inside the TARDIS oblivious to what Jackie had just done back in the flat. Right now, the Doctor was tinkering away underneath the console, repairing something that had apparently broken during the flight back to the Powell Estate courtyard.

"So, what're you doing down there?" Mickey questions the Doctor, curiously. The Doctor doesn't respond for a few minutes before sighing in exaggerated patience.

"Ricky," He began.

"Mickey."

"Ricky. If I was to tell you what I was doing to the controls of my frankly magnificent time ship, would you even begin to understand?" The Doctor asks him, a little condescendingly. Mickey frowned, mulling it over, before eventually replying.

"I suppose not."

"Well, shut it, then." The Doctor snaps, flatly. Mickey gives the Doctor a dirty look before turning and walking over to Rose and Katy, who were glowering at the Doctor in frustration, because of the way he was treating her boyfriend (Rose) and best friend (Katy).

"Some friend you've got there." Mickey commented, grumpily. Katy offers him an apologetic smile.

"Just ignore him. He's winding you up." Katy advises him, before pushing off the banister she was leaning against with her sister and goes over to ream out the Doctor for being such a prick to her friend. "Are you quite finished?" She demanded, sternly.

"Just about," the Doctor responded getting up from underneath the console after rearranging and fiddling about with some wires and checking the monitor. "I'm trying to figure out the trajectory the spaceship took." He explained, but Katy immediately brushed it off.

"Forget about your sodding trajectory, Doctor. That's not what I'm talking about." Katy stated, impatiently. "Why are you constantly having a go at Mickey? What the hell has he ever done to you?" She wanted to know. The Doctor paused and gave Katy a hard look.

"What's it to you?" The Doctor retorted, subtly giving Mickey a dirty look because of how incredibly brassed off Katy was with him now. "I thought he was Rose's boyfriend, not yours." The Doctor stated, and Katy bristled.

"Mickey is my best friend, Doctor. I care about him as much as Rose seems to, so his wellbeing, not to mention his morale means a great deal to me. So, I appreciate it if you lay off him already. He's not as bad as you may think he is." Katy insists. "I don't care how you do it, but deal with your issues with Mickey, already." The Doctor was quiet for a moment, still tinkering with something on the console, and eyed Mickey who was engrossed in a conversation with Rose, before eventually sighing.

"Fine. I can't promise anything, but I'll try not giving him a hard time." The Doctor stated, and Katy nodded.

"Good enough. That's all Rose and I ask." Katy took what she could get out of the Doctor. The console made a loud beeping noise, which instantly improved the Doctor's sullen mood.

"Got it!" He grabs Rose and Mickey's attention. "Ha, ha! Patched in the radar, looped it back twelve hours so we can follow the flight of that spaceship." Rose and Mickey crowd around Katy to look at the monitor also, as the Doctor made a few adjustments. "Here we go. Hold on. Come on." He looks at the trajectory that came up on the monitor and proceeds to explain to the three of them.

"That's the spaceship on its way to Earth, see? Except. Hold on." They watch the animation of the spaceship's trajectory make a sort of loop from one side of the Earth to another; specifically towards London. "See? The spaceship did a slingshot round the Earth before it landed."

"What does that mean?" Rose questioned.

"It means it came from the Earth in the first place." The Doctor explained, "It went up and came back down. Whoever these aliens are, they haven't just arrived, they've been here for a while." All three of them widened their eyes in shock. "The question is, what have they been doing?" The Doctor pondered.

The Doctor continues to do some more sleuthing, while Katy, Rose and Mickey channel-hop on the TARDIS's scanner. Mickey is both intrigued and curious about it.

"How many channels do you get?" He asked the Doctor, who was trying to make an effort of being nice to Mickey for Katy's sake. But sometimes, it was hard.

"All the basic packages." He responded.

"You get sport channels?" Mickey sounded excited, as the Doctor comes over to see what they were looking at.

"Yes, I get the football." But then he spots something important on one of the channels they stopped at. "Hold on, I know that lot." The Doctor announced, studying the group of Red Berets intently. It was the same group of soldiers that had almost arrested him back at Albion Hospital when he went investigating the alien body they had found.

"It is looking likely that the Government's bringing in alien specialists – those people who have devoted their lives to studying outer space." A woman on the telly was explaining, and the Doctor smiled.

"UNIT." The Doctor identified them. "United Intelligence Taskforce. Good people." The Doctor complemented approvingly.

"How do you know them?" Katy asked him. But Mickey jumped in before the Doctor could reply.

"'Cos he's worked for them." Mickey answered, earning surprised looks from them. "Oh yeah, don't think I sat on my backside for twelve months, Doctor. I read up on you." The surprised look on the Doctor's face, immediately changed to a bored one as he returned his attention back to the monitor. "You look deep enough on the Internet or in the history books, and there's his name, followed by a list of the dead." Mickey concluded, looking at the Doctor with a judgmental face, and the Doctor gave him a sarcastic smile.

"That's nice." The Doctor acknowledged. "Good boy, Ricky." He said, before giving Katy a 'you see why I give him a hard time now' look, that made Katy wince before glowering at Mickey out of embarrassment. It suddenly became clear that she had misjudged the situation, and that sometimes Mickey brought some of the ridicule from the Doctor upon himself. She mouthed 'sorry' at the Doctor who shrugged and gave her a cheerful smile back, which to Katy meant no harm was done.

Rose jumped into the conversation.

"If you knew them, why don't you go and help?" She asked, and the Doctor instantly thought back to the group of UNIT marines he had encountered back in the hospital and winced when he remembered the guns they had immediately trained on him.

"They wouldn't recognise me." He explained. "I've changed a lot since the old days. Besides, the world's on a knife-edge. There's aliens out there and fake aliens. We want to keep this alien out of the mix." The Doctor referred to himself as reference. "I'm going undercover. And, er, I'd better keep the TARDIS out of sight." Katy and Rose nodded, accepting the explanation. The Doctor turned towards Mickey, reluctantly realising he needed the boy's assistance in getting there as undetected as possible. "Ricky, you've got a car. You can do some driving."

Mickey nods, "Where to?"

"The roads are clearing. Let's go and have a look at that spaceship." The Doctor decides, and all three of them nodded before heading for the TARDIS double doors.

Powell Estate Courtyard

However, before they could do anything; the four of them found themselves surrounded by police officers and nearly blinded by a helicopter spotlight the moment they stepped from the safety of the TARDIS.

"Do not move!" Somebody orders, using a bullhorn to amplify their voice. "Step away from the box and raise your hands above your heads." The voice instructs forcefully. Katy's eyes readjust to the brightness of the spotlight above their heads and realises that they are surrounded by police cars and Saxon armoured personnel carriers. Mickey immediately legs it, making some soldiers chase after him, while Jackie comes jogging out of the block of flats.

"Rose! Katy!" She calls out in alarm. Some soldiers grab Jackie to stop her from coming closer to them. "Rose! Katy!" She calls out again, trying to fight them off. Mickey manages to hide himself behind some nearby dustbins, and the soldiers following him run straight past, missing him completely.

"Raise your hands above your head. You are under arrest." The police tells them, and Katy and Rose obey slowly, looking nervous. But the Doctor doesn't look fazed and puts his arms straight into the air; like being arrested wasn't entirely new for him. Which considering what the Doctor did regularly, wouldn't surprise Katy at all.

"Take me to your leader." The Doctor grins cheerfully, using the cliched phrase the stereotypical alien uses in crappy B-grade movies from the 1950s. Both Katy and Rose couldn't help but groan and mentally slap themselves in the forehead in exasperation. Police officers approach the three of them, and swiftly grab them and put their arms behind their backs, escorting them to an idling police car. Once they were safely secured inside, the police officer driving takes off down the road to an unknown location. Rose takes in her surroundings with interest.

"This is a bit posh. If I knew it was going to be like this, being arrested, I would've done it years ago." She joked, trying to lighten the mood.

"We're not being arrested, we're being escorted." The Doctor scoffs.

"Where to?" Katy asks, pulling her gaze away from the window she was staring out of, trying to figure out exactly where they were being taken to.

"Where'd you think? Downing Street." The Doctor replied, like it should've been obvious, and both Katy and Rose look at him, completely gobsmacked.

"You're kidding." Rose blurted out.

"I'm not." The Doctor confirms, smiling cheerfully.

"10 Downing Street?" Katy checks, dubiously.

"That's the one." The Doctor insists, and both sisters couldn't believe their ears. This was either their lucky day, and they were about to see what was really going on inside Downing Street. Or, they were headed for a trap laid out for the Doctor. Either way, very few people who weren't politicians or the Prime Minister ever saw inside the famous dwelling. Question was: why were they being brought there?

"Oh, my God. We're going to 10 Downing Street!" Rose was excited, but then she frowned with confusion. "How come?" The Doctor looked a little hesitant, and both girls were instantly concerned.

"I hate to say it, but Mickey was right." The Doctor stated reluctantly. "Over the years I've visited this planet a lot of times, and I've been, er, noticed." He admitted, uncomfortably.

"And now they need you?" Katy asked.

"Like it said on the news. They're gathering experts in alien knowledge. And who's the biggest expert of the lot?" The Doctor tested their knowledge.

"Patrick Moore?" Katy was quick to answer, and the Doctor gave her a flat look, of which she returned a playful smirk at him.

"Apart from him." The Doctor snarked, and Rose giggled at the Doctor's reaction to Katy's answer.

"Oh, don't you just love it." She teased, and the Doctor ignored her as the police car started to pull up alongside the front door of 10 Downing Street.

"I'm telling you. Lloyd George, he used to drink me under the table." The Doctor reminisced and frowned curiously. "Who's the Prime Minister now?" Both Katy and Rose shrugged, looking clueless.

"How should we know? We missed a year, remember?" Katy reminded him as they get out of the car, and the Doctor mugs for the cameras outside number ten, while Katy and Rose both shield their faces with their hands.

"Oh, my God…" Rose remarked, flinching away from the flashing lightbulbs going off in her face as she follows her sister and the Doctor inside.

The Tyler Flat

Meanwhile, back at the Tyler's flat, Jackie was in the middle of talking with a group of police officers about Katy and Rose.

"So, they're all right then? They're not in any trouble?" Jackie asked, looking a little worried that she might've gotten her daughters into trouble. One of the officers, a fat policeman named Strickland, attempts to explain things to Jackie.

"Well, all I can say is, your daughters and their companion might be in a position to help the country. We'll need to know how they made contact with this man, if he is a man." He explains to Jackie as he takes a seat. His stomach makes an unpleasant noise as he sits. "Oof. Right, off you go then." He addresses the two other police officers with him. "I need to talk with Mrs. Tyler on my own, thank you."

The two officers leave the room.

A Waiting Room
10 Downing Street
Central London

Harriet Jones, a backbencher MP from a relatively unknown London suburb called Flydale North, hurries downstairs after witnessing a truly horrific murder. She shows her ID to an armed policeman, who eyes it briefly.

"Harriet Jones, MP Flydale North." She introduces herself, and moves off when the policeman nods and she mingles with the UNIT officers and the large group of people in the room, as one of the men suddenly attempts to grab everyone's attention, including Katy, Rose and the Doctor who have just walked into the room; looking around curiously.

"Ladies and gentlemen, can we convene? Quick as we can, please." He announces, trying to corral the large crowd of people into another room. "It's this way on the right, and can I remind you ID cards are to be worn at all times." He picks up one and hands it to the Doctor, who takes it. "Here's your ID card." He eyes Katy and Rose with a frown. "I'm sorry, Doctor." He pauses and takes another look at the Time Lord to make sure he was talking to the right person. "It is the Doctor, isn't it?" The Doctor nods impatiently. "They'll have to stay outside." He says, indicating towards Katy and Rose, who look disappointed and a little taken aback at being dismissed so quickly. The Doctor frowns almost immediately.

"They're staying with me." He insists, firmly. The man, Ganesh, sighs heavily, probably already suspecting that he'd have a fight on his hands when it came to the Doctor's cooperation.

"Look, even I don't have clearance to go in there." He explains, with exaggerated patience. "I can't let them in there and that's a fact." Ganesh insists, firmly.

"It's all right. You go." Rose insists, and Katy nods in agreement.

"We'll be fine. Don't worry about us." She insists, and the Doctor nods reluctantly. Harriet, who had been eavesdropping nearby, steps forward to address the Doctor.

"Excuse me. Are you the Doctor?" She asks, politely.

"Sure." The Doctor replies looking a little cautious. However, Ganesh sees her and looks incredibly annoyed. Like he had already turned away this woman once before, and she couldn't take a hint. Which Katy reckoned was probably the case.

"Not now. We're busy. Can't you go home?" He tells Harriet, impatiently.

"I just need a word in private." Harriet insists, and the Doctor shrugged, not caring either way. He just wanted to know what the hell he and his companions were doing in Downing Street in the first place.

"I suppose so." He agreed, before turning to address Katy and Rose, looking stern. "Don't get in any trouble." He warns, before turning and walking off. Harriet goes to follow, but Ganesh cuts her off, seeing right through her act.

"You haven't got any clearance. Now leave it." He says with a finality in his voice. Ganesh turns back to Katy and Rose. "I'm going to have to leave you both with security."

"It's all right. I'll look after them." Harriet offers. "Let me be of some use." She turns and starts leading both girls away. "Walk with me." She instructs the bemused girls. "Just keep walking. That's right. Don't look around." She says when Katy goes to do just that. Both girls look at Harriet curiously and cautiously as Harriet flashes her ID at them. "Harriet Jones, MP Flydale North."

"Er, hello." Katy greets her, politely.

"Hi," Rose responded, just as perplexed. Harriet leads them away from the group walking into the briefing room, before stopping and looking at both girls in earnest.

"This friend of yours," Harriet questioned, indicating in the direction that the Doctor had just taken towards the briefing room. "He's an expert, is that right? He knows about aliens?"

"Why do you want to know?" Katy asks, cautiously. Both girls react in surprise when Harriet begins to cry frightened tears, and both of them attempt to comfort the obviously traumatised woman.

The Briefing Room

The briefing room was full of the alien experts when the Doctor filed in with the rest of the 'authorised' people.

"Now ladies and gentlemen, if I could have your attention, please." The overweight general of the marines, General Asquith, whom the Doctor had come across at the hospital, addresses the group and the Doctor. "As you can see from the summaries in front of you, the ship had one porcine occupant." The Doctor chooses this moment to interrupt him and put in his two cents worth.

"Of course, the really interesting bit happened three days ago, see, filed away under Any Other Business. The North Sea. A satellite detected a signal, a little blip of radiation, at one hundred fathoms, like there's something down there." The general, the other MPs and all the experts all stare at him, wondering where he was going with his ramblings. "You were just about to investigate and the next thing you know, this happens. Spaceships, pigs, massive diversion. From what?" The Doctor ponders.

The Cabinet Room

Harriet led both Katy and Rose to the cabinet room where she had witnessed the murder. She had also found the previous skin suit the fat alien had been wearing before it murdered and created a body suit from the corpse. Harriet was in hysterics.

"They turned the body into a suit." She was explaining to a very concerned Katy and Rose, who knew that the Doctor was currently in the briefing room with the very aliens whom Harriet had witnessed killing another innocent person. "A disguise for the thing inside!" Harriet was desperate for someone to believe her, and thankfully, she had two people who would believe her standing right in front of her, holding onto every word she was saying. Rose reached out and placed a calming hand on the older woman's arm.

"It's all right. We believe you." She reassures Harriet who relaxes a little. "It's, it's alien."

"They must have some serious technology behind this." Katy theorised. "If we can find it, we could use it." She and Rose start searching the room for more evidence. Katy opens a different cupboard, and she screams and jumps back when a man's body falls out of it unexpectedly. Both Rose and Harriet turn to her to see what had scared her and react with horror when they see what she had found.

"Oh, my God! Is that the—" Rose blurted out but is cut off when Ganesh walks into the room, looking at Harriet angrily.

"Harriet, for God's sake. This has gone beyond a joke." He rants at the older woman, who isn't paying him attention. "You cannot just wonder." Then Ganesh finally notices what she, Katy and Rose were looking at with horror. "Oh, my God. That's the Prime Minister!"

"Oh!" All heads snapped towards the open door, revealing a portly older woman with a neat and styled blonde bob and dressed professionally, standing there, wearing a smug, condescending smirk on her face. "Has someone been naughty?" She asked, innocently. Both sisters knew that very moment, that they were screwed.

Briefing Room

At the same time, the Doctor was still trying to piece things together, much to the confusion and slight irritation of everyone in the room. But when the Doctor was on a tangent, it was really difficult to stop him once he got going.

"If aliens fake an alien crash and an alien pilot, what do they get?" A sea of blank faces, which causes him to sigh in exasperation. Did he really have to spell it all out for them? Was he the only person in the room with a brain? "Us. They get us." He reveals, then pales when he realises exactly what that meant. "It's not a diversion, it's a trap." He concluded, with a look of dread on his face.

'Katy… Rose…'

The Tyler's Flat

She didn't know it either, but Jackie was also in mortal danger too. But being none the wiser, she continued telling everything she could think of about the Doctor to the police officer sitting in front of her looking calm and patient. But in reality, he was about to unleash something truly terrible upon the unsuspecting woman he was listening to.

"It was bigger on the inside." Jackie explained, describing the fathomless interior of the TARDIS to who she believed to be an ordinary police officer, attempting to help her with her 'alien' problems, and possibly protect her daughters from the danger she suspected them to both be in with the mysterious Doctor. "I don't know. What do I know about spaceships?" She rambled on, before getting to her feet and heading into the kitchen to make yet another cup of tea for herself and her guest.

"That's what worries me." Strickland began, as he got to his feet and removed his police cap. "You see, this man is classified as trouble." He straightens up and makes sure that Jackie is well and truly preoccupied in the kitchen before reaching for a zip across his forehead. "Which means anyone associated with him is trouble. And that's my job…" Then he starts undoing the zip across his forehead. Eerie florescent-style blue light fills the flat. "Eliminating trouble."

Cabinet Room

Ganesh turns and looks at the woman, whose alias was called Margaret, with a look of complete confusion. Katy, Rose and Harriet weren't idiots; they could sense something off about this woman, and immediately start backing away, valuing their lives.

"That's impossible," He insists, indicating towards the dead body of the former Prime Minister. "He left this afternoon. The Prime Minister left Downing Street. He was driven away!" He stated, very confused. The malicious smirk on Margaret's face deepened.

"And who told you that, hmm?" She ponders rhetorically, as she sets aside her purse and then brushes aside her fringe, revealing a zip just like Strickland back at the Tyler's flat had across her forehead, and reaches for it. "Me."

She starts pulling it across, and the same blue light that filled the Tyler's flat starts filling the room eerily.

"Oh, we're in for it now…" Katy muttered, as Rose clutches anxiously at her arm. Their eyes never leaving the now revealed alien from their sights.

Briefing Room

Once the Doctor realised the seriousness of their situation, he began searching for a way out. But at the same time stalling by babbling on about the reasons why he and the rest of the experts had been lured here to 10 Downing Street in the first place. He just hoped that Katy and Rose were safe with that Harriet woman he had left them with and wasn't in immediate danger like he currently was.

"This is all about us. Alien experts: the only people with knowledge how to fight them, gathered together in one room." One of the politicians standing at the front of the room, lets out a wet sounding fart, and the Doctor turns and looks at him with a combination of disgust and incredulity. "Excuse me, do you mind not farting while I'm saving the world?" He requested, annoyed. The man who farted, Joseph Green, snickered in childish amusement.

"Would you rather silent but deadly?" He joked, igniting a wave of snickers from the other politician standing around or beside him. The General removes his cap and reaches for another zip across his head, revealing himself to be yet another alien like Strickland and Margaret, and proceeds to unzip. The room fills with more blue light and a puke green alien starts to wriggle out of the skin suit.

In the Cabinet room with Katy, Rose and Harriet; Margaret is doing the same thing and flexes her three long fingers in relief. While at the Tyler's flat, Jackie walks out of the kitchen to see 'Strickland' emerging from his skin suit, and she watches with terror. All the aliens are nearly eight feet tall, with incongruous large black eyes in small baby faces. But it doesn't make them look any less terrifying to see.

"We are the Slitheen." The alien who was masquerading as General Asquith, rasps. Margaret grabs a terrified Ganesh in her massive talons and pushes him up the wall, witnessed by Katy, Rose and Harriet, who watch helplessly. Green, still in his 'human skin suit', gives the Doctor and the other alien experts an oily grin.

"Thank you all for wearing your ID cards. They'll help to identify the bodies." He states, ominously before holding up a remote activation switch, and the ID cards emit electric shocks to their wearers, including the Doctor.

A/N: Please review :)