Well this is it, chapter four and all's well. I'm not going to be bringing in all the other companions, because I don't think I can control that many characters, so I've had to choose only a couple of them to make an entrance. You'll see who I've chosen at the end of the chapter - I hope you approve :P

John's POV

They spent the rest of the afternoon sitting at John's desk – well, Rose sat at the desk on a comfy chair, while John sat on it, swinging his long legs like a schoolboy – filling out the necessary paperwork for Rose's transfer to John's department and having fun. John had laughed more in that one afternoon than he had in a long time, enjoying showing Rose all of the strange contraptions that littered his desk and giving her a tour of her office, which was a lot smaller than his but decorated in the same way. To John's delight, however, she did not spend any time in there that day, choosing to stay with him and let him explain the details of the job to her.

John was realising for the first time how much he actually needed someone to help him. Someone to stop him really. After all, he tended to get so carried away on a case (or on something frivolous that wasn't a case more often than not) that he filled in no paperwork, did not bother to make appointments and generally caused chaos wherever he went. Rose was not the most organised of people, but he had already noticed that she had a knack for saying the right thing or asking the right question.

"What time is it?" gasped Rose as she struggled to control her laughter. John had just told her one of his finest anecdotes, about the time when he was a student and he and his friends at university had all dressed up as shop window dummies and attacked people in the streets. John sometimes wondered why exactly they had thought to do that, but the look on Rose's face when he had told her about it was enough to make him grateful that he had been such an idiot at that age.

John looked at his watch. "Oh bloody hell, it's quarter past 6! I'm so sorry, the latest you should be finishing is half 5, I don't know what happened—."

"John, relax," Rose said, not looking at all perturbed by the fact that she was 45 minutes late, "it's been so fun, I haven't laughed like that in so long. And besides, if you're enjoying your job that much then working overtime isn't exactly bad news, is it?"

John was overjoyed to see the beaming smile on her face and couldn't help but return it, glad that he had manged to take away the look of loneliness and not believing that that morning he had been considering not even going to talk to her. After all, none of his assistants lasted very long and Rose seemed so nice, he didn't want their relationship to be ultimately doomed. You are such a drama queen, who says "ultimately doomed" when describing a relationship? John ignored the more rational part of himself and focused on Rose, who was pulling on her coat and picking up her bag.

"You gonna walk me out?" John took a moment to respond to this – he had not been expecting it – but he quickly turned around and grabbed his coat before grinning at her.

"Rose Tyler, I would be delighted." John quickly pulled on his coat (it was long and brown and he loved it, it swished out when he ran and made everything seem that bit more dramatic – oh god I am a drama queen!) before offering Rose his arm. She linked hers through it, and together they strolled through the door and off down the corridor.

They walked together all the way down the road towards the bus stop, getting caught up in a conversation about fruit ("I love bananas so much, they're just fantastic!" "I quite like pears-," "What!? That's it, I'm sorry, but if you are going to be eating pears then we aren't going to be working together and that's that. They are the fruit of the devil, just pure evil!" "If you say so..."). John waited with Rose until her bus came.

"You don't need to wait, I'll be fine."

"Nonsense, I'm the one who made you late. And besides, I'm not waiting with you , I'm protecting the other citizens of the world. Anyone whose favourite fruit is pears should be carefully monitored at all times." John squinted at her face, leaning in towards her until she started laughing and he couldn't help but join in. He loved her laugh. It was probably the happiest sound he'd ever heard. Or, at least, it made him feel the happiest he'd been in a long time.

"Oh alright then Batman, I'm sure Gotham City is much safer now they've got you protecting them from pear maniacs like myself," said Rose, brushing her hair behind her ear. John reflected that he actually loved her blonde hair, and her hand as it brushed it back, and the ear that she hooked it behind. It wasn't that he loved Rose Tyler, he just loved little elements of her. And that's fine, a voice in his head seemed to say, not creepy at all.

Rose's bus rounded the corner and she turned to John. "I'll see you tomorrow then," she told him, and before he knew it John had grinned and hugged her. She was just the right height for him to hug and he wondered why he had never done this before. Because you met her 3 days ago, his brain reminded him. Oh yes, of course. That's why.

As he waved Rose's bus out of sight, John reflected that it was pretty lucky she had been waiting for a bus, because if he had just hugged her on a whim he would probably have not let go for a long time.

It wasn't until John had driven home that night and was in bed in his stripy pyjamas that he realised that, when leaving work with Rose, he had forgotten to lock his office door for the first time in history.

It took a total of 4 days before Rose moved into his office. John gave up and cleared Rose a space on his ridiculously cluttered desk after the fourth day of her sitting in the comfiest chair, filling out paperwork on her lap and distracting him from whatever he was supposed to be doing.

"It seems like I won't be getting any work done with you around, so I may as well give you enough space to do some if you can."

"Do you actually ever do any work?" Rose asked cheekily, giving him a sly grin with her tongue poking between her teeth just a little. John had noticed that this was a Rose Tyler trademark, and after 4 days of barely spending any time with anyone other than her, he wondered how he had ever lived without that smile in his life.

"Oi! I'll have you know that I am an integral part of this hospital's inner workings! Without me they would be lost."

"Well you say that, but in total you must've spent about 3 or 4 hours out of this office since I started working for you, and you definitely don't do any work while you're here."

"You're saying this isn't work?" John asked, gesturing towards the unidentifiable metal structure he was tinkering with.

Rose leaned in to get a closer look. "Oh I don't know. It just seems to me that work should be more medicine related, don't you think "Doctor"?"

John grinned at her now. She had taken to calling him "Doctor" ever since that first day when she had accidentally called him that instead of John. It was her own special nickname for him, and that made him much happier than he would care to admit to anyone, least of all Rose.

John had opened his mouth to reply but before the words had even formed in his brain, never mind come out of his mouth, there was a knock at the door. They both look around, slightly confused. John barely ever had people coming to see him in his office (he knew how the 'bigger on the inside' thing could freak people out) and he knew that no-one had so much as knocked on the door in the time he and Rose had been together—no, in the time they had been working together, that was it.

The knock sounded again, only this time it was joined by a smooth American voice saying "knock knock".

"Oh god," said John, jumping up from his chair and turning to Rose, who was looking at him in confusion.

"What?"

"OK Rose, keep your head and just remember: he's like this with everyone, including me."

John realised that he had managed to add to Rose's confusion rather than improve it but it was too late for him to try and explain, because the door had swung open and Rose's attention was fixed on the man who stood in the doorway, leaning against the frame.

The man looked around the room before fixing his eyes on Rose. John fought the urge to bury his face in his hands and this man who he normally called his friend (though he could think of a few other names for him) walked straight up to Rose, holding out his hand for a handshake.

"Hello. Jack Harkness. And who are you?"

CAPTAIN JACK ATTACK! I am sorry everybody, but I simply could not resist having him make an appearance. One of my greatest wishes is that they bring back Jack into Doctor Who, or even that they include him in whatever they do for the 50th anniversary (which had better have old Doctors in or I'm going to cry). But anyway, I hope you enjoyed, and thanks for all the brilliant reviews!