"What was that?" Rose asked running in the direction of the scream her and Rita also heard.

"Your boyfriend" Rita chuckled also running in the direction.

They ran in the direction and then bumped into Sarah Jane and the Doctor. "Great now this turns into a soap opera" Rita groaned. "I'm not getting into this" she held her hands up in defence. The Doctor raised a brow.

"Did you hear that?" Rose asked the Doctor then noticed Sarah Jane. "Who's she?"

"Rose, Sarah Jane. Sarah Jane, Rose." he introduced them.

"Should have known you were going to be here" Sarah Jane chuckled talking to Rita. "Lovely to see you again"

"Same with you Sarah Jane" Rita chuckled, Sarah Jane then turned to Rose "Hi. Nice to meet you." She then looked over at the Doctor "You can tell you're getting older. Your assistants are getting younger." Rita rolled her eyes at the comment. "No offence?" Sarah Jane stopped obviously forgetting the girl's name.

"Rita" the brunette smiled.

"Sorry not good with names"

"Neither am I" Rita agreed.

"I'm not his assistant," Rose commented sounding pissed off. "Can someone tell me what's going on?"

"Met Sarah Jane in the staff room earlier today. "Love your work by the way" Rita grinned while Sarah Jane frowned.

"Foreknowledge" The Doctor informed her. "She knows my future."

"And you're past. Also a little about Sarah Jane. I'm from the future he would probably call it a 'Parallel world'" she used her fingers as speech marks. "I'm human 100% human but somehow I ended up on a Dalek ship and met these two" She pointed at the Doctor and Rose with her thumb after telling the basic information.

"Sounds impossible." Sarah Jane smiled.

"He likes impossible" Rita grinned.

"Where is Mickey?" Rose crossed her arms getting annoyed that she was basically being ignored.

"Good question" the Doctor praised. "Let's go find out" he then ran down the hall followed by Rose, Rita ran beside Sarah Jane who was chatting to her while they ran.

"So you're from the future and a parallel world?" Sarah Jane asked.

"Yeah, in my world this" she gestured to everything around her as they ran. "Is just a TV show, kind of like Sherlock, ooh I wonder if there is a parallel universe where Sherlock is real" she thought out loud while chuckling.

"And you just turned up?" She asked.

"Pretty much yeah, you could call me 'the impossible girl' but there is already one of those" They continued to run and then stopped outside a room where Mickey was standing in front of a load of bags.

"Sorry! Sorry, it was only me." He held his hands up. "You told me to investigate, so I started looking through some of these cupboards and all of these fell on me."

"Oh, my God," Rose gasped holding a hand over her mouth. "They're rats. Dozens of rats. Vacuum packed rats."

"And you decided to scream." The Doctor raised a brow.

"It took me by surprise!" Mickey defended himself.

"Like a little girl?" he mocked Mickey.

"It was dark! I was covered in rats!" Mickey protested his voice raising a little.

"Nine, maybe ten years old. I'm seeing pigtails, frilly skirt."

"So I am" Rita joined in laughing.

"Hello, can we focus?" Rose groaned. "Does anyone notice anything strange about this? Rats in school?"

"Well, obviously they use them in Biology lessons." Rita nodded agreeing with Sarah Jane. "They dissect them. Or maybe you haven't reached that bit yet. How old are you?"

"Excuse me, no one dissects rats in school anymore." Rose spat in annoyance. "They haven't done that for years. Where are you from, the dark ages?" She sassed.

"I dissected rats in year eleven of school and I'm from the future" Rita defended Sarah Jane. "Ah the digestive system, fun times."

"Anyway, moving on." The Doctor scratched the back of his neck not enjoying the arguing. "Everything started when Mister Finch arrived. We should go and check his office." They left the bags of rats and headed for the headmasters office.

"They're not going to stop arguing," Rita whispered to the Doctor.

"They will work it out-"

"I don't mean to be rude or anything, but who exactly are you?" Rose turned to Sarah Jane.

"Hopefully" He groaned in annoyance.

"They will" Rita smiled then slowed down to walk beside Sarah Jane and Rose.

"Sarah Jane Smith. I used to travel with the Doctor." Sarah Jane said proudly.

"Oh. Well, he's never mentioned you." Rose smugly grinned.

"Oh, I must've done." The Doctor frowned thinking. "Sarah Jane. Mention her all the time."

"Hold on." Rose thought for a moment. "Sorry. Never."

"What, not even once?" Sarah Jane looked at the Doctor not believing a word Rose was saying. "He didn't mention me even once?"

"Ho, ho, mate. The missus and the ex." Mickey patted the Doctors shoulder. "Welcome to every man's worst nightmare."

"God Mickey you don't know what to keep yourself quiet" Rita rolled her eyes.

The group walked the rest of the way in silence, Rita could see Rose and Sarah Jane giving each other dirty looks. 'If they don't stop soon I'm going to have to do something to at least get the comments to stop.' Rita groaned not wanting to take sides with either of the companions since she very much loved them both. No Rita thought Not getting involved, not getting involved, I'm not getting involved. She repeated in her head over and over to stop herself and to block out the dreary silence.

The Doctor used his sonic screwdriver to unlock the door to Mr Finches office, the buzz of the screwdriver being the only sound in the school.

"Rita," the Doctor said breaking the 3 minutes or so of silence. "You know you used to say that there were bats in the school? You were right."

Mickey looking in the room turned and ran out. "No way!" Mickey shouted sprinting in the opposite direction of the headmaster's office, heading for the entrance to escape the school, Rose then followed after him not running as fast, however.

The Doctor and Rita looked at each other for a moment before he closed the door and walked in the direction that Mickey had run in moments before.

"What was that?" Sarah Jane asked following the Doctor and Rita.

"Rita?" The Doctor raised a brow.

"Secret: It's alien" She grinned.

"Well, I guessed that?" He rolled his eyes. "You are hard work sometimes."

"Can't give you all the answers. Would be no fun otherwise" Rita grinned smugly. "But seriously you might want to check the oil"

The Doctor nodded as the three walked out of the school.

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"I am not going back in there. No way." Mickey panted arching over and holding his knees to support his weight.

"Those were teachers," Rose said in disbelief.

"Thirteen" Rita mumbled.

"When Finch arrived," the Doctor started to talk "he brought with him seven new teachers, four dinner ladies and a nurse. Thirteen. Thirteen big bat people."

"And a TARDIS in a school" Rita chuckled. "No? Seriously it reminded me of the twelve days of Christmas the TARDIS was all I could think of" Rita shrugged.

"Come on." The Doctor turned around, Sarah Jane followed along with Rose heading back into the school.

"Come on? You've got to be kidding!" Mickey said in shock.

"I need the Tardis. I've got to analyse that oil from the kitchen."

"I might be able to help you there. I've got something to show you."

"Now this is where I start to enjoy myself" Rita mumbled following Sarah Jane to a car.

Sarah Jane opened the boot to her car showing the shape of something under a white sheet.

"May I?" Rita looked at Sarah Jane who nodded smiling. Rita grinned and then dramatically pulled the sheet away showing a damaged metal dog sitting in the boot.

"K9!" said the Doctor excitedly. "Rita Stone, Rose Tyler, Mickey Smith, allow me to introduce K9. well, K9 Mark Three to be precise."

"Why does he look so disco?" Rose frowned not looking very impressed.

"Oi!" he looked offended. "Listen, in the year five thousand, this was cutting edge."

"K9 is cool, just like bowties and Fezzes" Rita grinned the Doctor looked at her confused.

"Bowties?" He questioned.

"Fezzes?" Sarah Jane also questioned the brunette most likely thinking she was going crazy, which to be fair knowing the outcome of everything going to happen was making her a little odd.

"Don't worry it's secrets." She shook her head and began to pat K9

The Doctor then asked: "What's happened to him?"

"Oh, one day, he just, nothing."

"Well, didn't you try and get him repaired? " He questioned as if it was just as simple as that.

"Well, it's not like getting parts for a Mini Metro, Beside, the technology inside him could rewrite human science. I couldn't show him to anyone."

"Ooh, what's the nasty lady done to you, eh?" he scratched K9 behind the what would be the ear and spoke to the metal dog as if he was real. Rita snorted at the way he was talking. Sarah Jane then began to pet him as well.

"Look, no offence," Rose huffed feeling left out. "But could you three just stop petting for a minute? Never mind the tin dog. We're busy."

"She has a point" Rita sighed. "Can you fix him?" Rita looked up at the Doctor suggesting a secret which he grinned understanding what she meant.

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The group were in a chip shops Rita, Rose and Mickey were standing waiting for the chips to be ready for collection while the Doctor and Sarah Jane were talking while fixing K9 "You see, what's impressive" Mickey began and Rita groaned a little knowing what he was going to say. "I s that it's been nearly an hour since we met her and I still haven't said I told you so."

"I'm not listening to this." Rose put her hands up.

"You and me both" Rita groaned.

"Although, I have prepared a little I was right dance that I can show you later." Mickey continued. Rose handed the money to the woman and collected the chips. "All this time you've been giving it, he's different, when the truth is, he's just like any other bloke." Mickey pressed on with the subject.

"Mickey you have no idea what you're going on about." Rita began to lecture him having had enough of the topic. "The Doctor isn't just 'like any other bloke' he's 900 or so years old for goodness sake I don't know why Sarah Jane and Rose are making it a competition over the Doctor but getting involved isn't going to help."

"Mickey, you don't know what you're talking about." Rose sided with Rita not denying the competitive comment made by the brunette.

"Maybe not. But if I were you I'd go easy on the chips." Rose paused noticing she was throwing a chip in her mouth almost every second.

"I'm going over to them, maybe they won't argue" Rita sighed walking over to the Doctor and Sarah Jane.

"I thought of you on Christmas Day." Rita heard the woman talking. "This Christmas just gone? Great big spaceship overhead. I thought, oh yeah, bet he's up there." Rita grinned.

"I saw it well probably not everything but most of it. Lazy Time Lord was too busy sleeping because he saved Rose and had to regenerate. So Rose, Mickey and the prime minister had to do his dirty work. That was until he woke up started to mimic the Sycorax, start to sword fight it then gets his hand cut off and then grown a 'fightin' hand'" She copied how the Doctor said it in the 'episode' "That sum it up Doctor?"

"Pretty much yeah" he smiled shaking his head "You wasn't even there"

"And Rose?" Sarah Jane asked.

"She was there."

"Did I do something wrong?" she asked him. "Because you never came back for me. You just dumped me."

"I told you. I was called back home and in those days humans weren't allowed," he replied.

"I waited for you." She then paused. "I missed you." Rita's face fell for the woman, she saw many of the Doctors companions get 'left behind' Some because they had no choice, they forgot him and some needed to get out.

"Oh, you didn't need me." he shrugged at her. "You were getting on with your life."

"You were my life." she sighed. "You know what the most difficult thing was? Coping with what happens next, or with what doesn't happen next. You took me to the furthest reaches of the galaxy, you showed me supernovas, intergalactic battles, and then you just dropped me back on Earth." She then asked an impossible question to answer, yet the Doctor had an answer every time. "How could anything compare to that?"

"All those things you saw, do you want me to apologise for that?" He asked.

"No," Sarah Jane said quickly. "But we get a taste of that splendour and then we have to go back."

"Look at you, you're investigating. You found that school. You're doing what we always did."

"You could have come back." she pressed on.

"I couldn't."

"Why not?" He ignored her question as if it never happened, continuing to work on and mess around with K9 Rita looked at her with sympathy understanding what she was going through even when she had never gone through it herself. Sarah Jane looked at her and smiled sadly thinking that one day that would be Rita and Rose just left or taken away Rita would most likely go back to her universe and never see the Doctor again. Rose would probably go back home.

"It wasn't Croydon. Where you dropped me off, that wasn't Croydon." Sarah Jane spoke up. Rita chuckled rolling her eyes.

"That sounds like something he would do"

"Where was it?" he asked sending a playful glare at Rita.

"Aberdeen."

"Right. That's next to Croydon, isn't it?" he asked obviously knowing that it definitely was not.

"God help you in my old geography class," Rita muttered just as K9 came on lighting up and moving his head.

"Oh, hey. Now we're in business." the Doctor stepped back watching the metal dog.

"Master." He spoke in what Rita though was an adorable voice.

"He recognises me." The Doctor beamed in amazement.

"Affirmative."

"He's adorable" Rita smiled patting K9's head.

"Rose, give us the oil." he gestured to her not turning back from the metal dog.

"I wouldn't touch it, though." She said walking over and handing a small pot filled with the oil. "That dinner lady got all scorched."

"I'm no dinner lady. And I don't often say that." He stuck a finger into the pot and collected some of the oil then smeared it on K9's probe sticking out of his head.

"Yeah add that to long list of words you will never say again, right under 'correctamundo'"

He finished smearing the oil on while playfully glaring at Rita again. "Here we go. Come on, boy. Here we go."

"Oil. Ex... Ex... Ex" K9 stuttered most likely still 'booting up' "extract. Ana ana analysing."

"Listen to him, man. That's a voice." Mickey laughed.

"Careful. That's my dog." Sarah Jane warned him, Mickey held his hands up apologetically.

"Confirmation of analysis. Substance is Krillitane Oil." K9 concluded.

"They're Krillitanes." The Doctor mumbled standing back a little.

"Is that bad?" Rose asked.

"Very." He thought of how to describe it. "Think of how bad things could possibly be, and add another suitcase full of bad."

"Then add another" Rita added.

"And what are Krillitanes?" Sarah Jane questioned not having come across them before.

"They're a composite race." The Doctor started to explain what the Krillitans were to the group, Rita already knowing just patted K9 not really listening to the whole description. "Just like your culture is a mixture of traditions from all sorts of countries, people you've invaded or have been invaded by. You've got bits of Viking, bits of France, bits of whatever. The Krillitanes are the same. An amalgam of the races they've conquered. But they take physical aspects as well." Rita shrivelled her nose at the thought of literally having parts of you ripped off for the Krillitans to do as they pleased. "They cherry pick the best bits from the people they destroy. That's why I didn't recognise them. The last time I saw Krillitanes, they looked just like us except they had really long necks."

"And now they look like big bats" Rita crossed her arms and leant on the table. "Big ugly bats"

"What're they doing here?" Rose asked mainly at Rita and the Doctor

"It's the children. They're doing something to the children." The Doctor mumbled. "Rita anything?"

"Hmmm," She hummed and tapped her chin for emphasis. "Secret: Fish and chips." The Doctor nodded most likely not fully understanding but not pressing on with asking for any more secrets, instead, he instructed Mickey to help Sarah Jane carry K9 they both exited the small ironic fish and chips shop heading for Sarah Janes car.

"How many of us have there been travelling with you?" Rose blurted out just after Sarah Jane and Mickey left.

"Does it matter?" The Doctor asked.

"Yeah, it does, if I'm just the latest in a long line."

"As opposed to what?" the Doctor questioned

"I thought you and me were."

"Rose" Rita spoke up warning the blonde who ignored her warning.

"I obviously got it wrong. I've been to the year five billion, right, but this? Now, this is really seeing the future. You just leave us behind. Is that what you're going to do to me and Rita?

"No. Not to you."

"What about Rita?" Rose countered.

"No" was all he replied.

"But Sarah Jane?"

"Rose stop it That's-" Rita tried to warn the blonde again knowing what was to come next broke the Doctor and Rose's hearts and quite possibly Rita's heart as well.

"You were that close to her once, and now you never even mention her. Why not?" Rose continued to throw questions at the Time Lord.

"I don't age." The Doctor said coldly "I regenerate. But humans decay. You wither and you die. Imagine watching that happen to someone who you" he paused and looked between Rita and Rose.

"What, Doctor?"

"Rose stop it, can't you see?" Rita spat having enough of getting ignored. "It's clearly hurting you and him" she pointed to them both. "He's a Time Lord, how old is he Rose?" Rita asked having enough of the constant arguing going on for the day. "How old is he?" she repeated this time talking a lot harsher.

"Rita" The Doctor placed his hand on her arm speaking calmly and softly.

"Say it" Rita calmed down looking at the floor. "Tell her what she needs to know but don't say it how I know you would say it, Doctor"

Although he had no idea what she was talking about he spoke calmly and slowly not like how she knew he had said it in the 'episode' not coldly and harsh but calm and slow. "You can spend the rest of your life with me, but I can't spend the rest of mine with you. I have to live on. Alone. That's the curse of the Time Lords."

Rose sighed speechlessly. "Sorry" was all she mumbled the only word she could say before leaving the shop and joining Sarah Jane and Mickey, plastering a fake smile on her face hiding the broken pain now hidden in her heart, she saw the way Rita looked at him and how he switched his gaze between the brunette and herself when talking about watching people wither and die.

Rita sighed breaking the few seconds of tension and silence in the shop. "What's the plan then?" She asked although she knew the plan she was trying to lighten the mood a little and talk to the Doctor, the brunette was still leaning against the table the Doctor standing next to her arms folded just like she was, however, he was facing the table instead of away.

"Go back to the school tomorrow and have a word with Mister Finch" he replied. "I know you won't like it but you need to go with Sarah and Rose. Try and sort those two out, Mickey can be on dog watch."

"Alway going alone with you" Rita joked shaking her head. "Oh and if they're laughing their heads off tomorrow for some reason don't take it personally" She patted his shoulder, winked then walked out of the shop leaving the Doctor confused.

Rita looked up at the sky and groaned when she saw a Krillitan perched on top of a building. Realising it had been noticed it dived down towards her. Rita ducked, the Krillitan barely missing her head.

"You alright?" The Doctor ran out of the shop and over to Rita.

"Was that a Krillitane?" Sarah Jane asked rushing over to the brunette who was crouched down beside the Doctor.

"But it didn't even touch her. It just flew off. What did it do that for?" Rose asked

"I don't even know what it did that for" Rita muttered watching the Krillitain fly away past the moon.

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The Doctor, Rose, Sarah Jane, Rita and Mickey all excited Sarah Janes car and stood watching the children enter the school. When nearly everyone had entered the building The Doctor began to explain to Rose, Sarah Jane and Mickey what they would have to do.

"Rose and Sarah, you go to the Maths room along with Rita. Crack open those computers, I need to see the hardware inside. Here, you might need this." He took the sonic out of his pocket both Sarah Jane and Rose held out their hands. Rita frowned. That's not how it's meant to go? Instead, the Doctor handed it to Rita. She just continued to frown a large crease forming on her forehead.

"Mickey, surveillance. I want you outside." The Doctor ordered.

"Just stand outside?" Mickey sighed thinking that he was just 'the tin dog'. One day Mickey.

"Here, take these you can keep K9 company." Sarah Jane threw her car keys over to him. The four then began to turn and head inside the school. The Doctor slowed down a little to walk beside Rita, she looked confused earlier and he wanted to know exactly why.

"Don't forget to leave the window open a crack." He said seriously over his shoulder.

"But he's metal!" Mickey shouted raising his arms up like the Doctor was being an idiot.

"I didn't mean for him." The Doctor shouted back.

"What're you going to do?" Rose asked.

"It's time I had a word with Mister Finch." He replied. "Rita" he held onto her arm as she began to walk away following Rose and Sarah Jane.

"Hmm?" she hummed turning around then noticing the Doctor holding her arm. She raised a brow and he quickly let go.

"You looked confused earlier?" He raised his eyebrows.

"Oh, it's nothing." She waved it off then turned around again to continue walking, the Doctor being stubbed grabbed her arm again pulling her back around to face him. "Fine" she sighed. He let go of her yet again knowing she was now going to talk. "In the 'episode'" she did a gesture with her hands for speech marks "Only Rose was meant to put her hand out for the Sonic screwdriver, but they both did and then you gave it to me. It's not meant to go like that you were meant to give it to Sarah Jane."

"Rita" he shook his head chuckling a little. "Sometimes things don't go the way that you see them. Little differences are normal especially in a parallel universe, it's the big differences you should worry about not the little ones. Plus is it a bad thing that I gave you my sonic screwdriver?" He raised a brow in question.

"No, no not really" Rita shrugged "I just thought that it had to do exactly as planned. I noticed a few changes but they bent around me so I just figured it was because I was here but even when I was Sarah Jane should have had the screwdriver.

"Well, I guess you have it now" He grinned. "You better go catch up with those two, gods only knows what they could be arguing about, I also need to go find Mister Finch."

"See you soon Doctor" Rita nodded then turned towards the school and ran inside. The Doctor sighed deeply then followed the brunette.

Sorry it's late I have been qute busy this week. :)