A/N: Sorry about the wait, but I've had a bad week of exams. Thanks to everyone who has favourited my story.

Disclaimer: Not mine, in case you hadn't noticed that this is on the computer, not in a book.

They all went to the kitchens for lunch, as Luke and Bree still had to eat there. The Doctor was there when they arrived, but left soon after to oversee the moving of the TARDIS. Nothing much happened during lunch, but Luke was bombarded with questions about himself.

'Are you a muggle?'

'I have a magical core, apparently, but I was never 11, so I couldn't have got my letter.'

'Why…'

'Was I never 11? I was grown by aliens, to help them take over the world, but mum, my friend Maria, who moved to America, and I defeated them. When I was activated I was about 14 body age.' This was met by open mouths. Bree, who had had a lot to deal with since she found out she's stowed away in a spaceship and ended up at Hogwarts, got over it quickest.

'Why does the Doctor need you to help?'

'When I was grown, I was given the cleverness of 10'000 men. I'm quite good with machines, and science. I'm terrible with people, though, because I never grew up.'

'So how old are you technically?'

'Three.'

'Ahh.'

Luke was soon part of the gang, just as Bree was. Sunday evening found them all sitting in the Gryffindor Common Room, in varying moods. Harry, Ron and Hermione were tired and depressed about the closeness of Monday morning, whereas Luke and Bree were very excited.

Bree was so excited she couldn't sleep. After lying in bed, gazing at her hangings for a while, listening to the other girls' deep breathing, she sat up, rolled her legs out of her bed and got out. Picking up her dressing gown that was draped over her chest of drawers, she made her way back down to the Common Room.

When she got there, however, her favourite seat by the fire was already taken.

'Oh. Hi,' said Luke.

'Hi,' she said, gazing forlornly at her seat.

'What are you doing up?'

'Couldn't sleep.'

'Me neither.'

She stood there for a bit longer.

'Are you going to sit down?' asked Luke, his forehead puckering with confusion. She shook her head.

'You're sitting in my favourite place,' she told him, sadly. It wasn't that special, but she'd been so looking forward to curling up on that seat, and feeling the heat from the fire on her face and front, rather than on one side.

'Oh, sorry,' he said, and he shuffled over. 'But it's my favourite too, so we'll have to share.' He grinned, and Bree walked over, thankful the seats were so big. She squished in next to him. She could feel the heat from his body and the heat from the fire, and it was very comfortable. They sat there for a while, but after a time she noticed Luke was looking a bit sad.

'What's the matter?' she asked. He sighed.

'It's a bit silly really.'

'Tell me? Please?'

'No, it's silly,' he said, waving his hand and accidently biffing her head, forgetting how close they were. 'Oh, sorry.'

'S'ok,' said Bree, combing her hair flat again. 'Please tell me?'

'Promise you won't laugh?'

'I promise.'

'Well, it's just that I've never been away from my mum for more than two nights, and I just feel a bit…'

'Homesick?'

'Yeah. But I won't see her for ages, and I just…'

'You're lucky. When this is all over, I go back to Aunt Millicent, who hates me. But I think, because you're so clever, people forget you're only three.' Luke smiled at her, and she patted his hand. 'Don't worry about it. It's more natural than wanting to stay here rather than go home.' He squeezed her hand, and Bree suddenly felt tired. She yawned widely, and Luke let go of her hand.

'Maybe we should go to bed now,' he said.

'It's going to be an exciting day tomorrow,' Bree yawned again, and set off to her dormitory. 'Night!' she called.

'Goodnight Bree,' said Luke softly, before going up to his own bed to sleep.

***

The Doctor woke up quite late Monday morning, and had to rush to get to breakfast on time. Dumbledore was going to introduce him, Luke and Bree officially today, and he couldn't be late.

He was excited about his classes, which would start with the seventh years straight after breakfast. He was all set up, and interested to see what the young witches and wizards would make of Physics, being a muggle subject. Bree had told him she'd been doing GCSE Physics so she would be far ahead of the others, as would Luke. He had decided to separate them from the rest of the class, and he had special books. It would make marking a nightmare, with two different things, but he wanted everyone to learn.

He sped through the corridors, slipping and sliding in his converse. He managed to avoid most of the students, but he went straight into Bree, who was also running to breakfast.

'Ouch!' They both yelled, but thanks to Luke's quick thinking, did not end up on the floor.

'You late as well?' asked Luke, trying not to laugh, but failing miserably.

'Yeah, but there's nothing wrong with a bit of healthy running. Gets the adrenalin pumping,' said the Doctor.

'Next time you get your adrenalin pumping, could you try and avoid other people,' said Bree, rubbing her shoulder. But she had a twinkle in her eye, so the Doctor knew she wasn't that upset.

'Hurry up, you'll be late for breakfast,' he said, in his most teacher-ish tone, and strode off towards the Great Hall. As he went, he heard Bree distinctly mutter 'Hypocrite' behind him. He grinned.

'And don't you just love me!' he called over his shoulder.

The Great Hall was almost full when he got there. Although he was wearing robes, he got a lot of stares as he made his way to the teacher's table, and muttering started up behind him, which got louder when Luke and Bree walked in behind him, and went to sit with Harry, Ron and Hermione at the Gryffindor table.

The students sat waiting for food to appear on the tables as usual, but nothing came. Instead, Dumbledore stood up, and held out his arms for quiet. There was a wave of chatting, and then the hall fell silent.

'Good morning. I just want a few minutes of your time before we start breakfast to introduce three people who will be joining our school.' Dumbledore waited for the talking to subside after this, and then began again. 'We have two new students, Luke Smith and Bree Penney, who are joining Gryffindor sixth year. We also have a new teacher, Professor Smith,' he gestured to the Doctor.

'Professor Smith?' asked Harry, under his breath.

'I'll ask in Physics,' Bree whispered back.

'Professor Smith will be teaching you Physics, a muggle subject, which will not be included in your OWL's or NEWT's, but there will be a test at the end of the year, set by the Doctor, so don't think you can slack off. Your timetables have been changed and will tell you when your lesson is.' There was a flurry of movement as everyone reached for their timetables, to see when they would have Physics.

'Yes, we've got it this afternoon,' said Bree excitedly.

'Now, tuck in!' said Dumbledore, and everyone turned their attention to the food which had just appeared in front of them.

The Doctor turned to Flitwick, who was sitting next to him, and struck up conversation.

***

'What do we have after breakfast?' asked Luke. Ron, too busy stuffing his eggs and bacon, jerked his thumb at Hermione.

'Hermione, what do we have?' he asked again. She glanced up from her book, and took pity on him.

'I've got Ancient Runes, but you're not taking that, so you've got a free period.'

'First thing on a Monday? Excellent!' said Bree, tucking into her bacon.

'And I've got no homework, so I can relax!' said Ron triumphantly, throwing down his fork.

'Neither have we,' said Bree, gesturing to herself and Luke with her knife, and splattering Luke with tomato sauce. 'Oops, sorry.' Luke grinned, dipped his fingers in his pumpkin juice and flicked the droplets at her. She shrieked, and shoved Ron in front of her, who promptly fell off his chair. Hermione and Ginny had an attack of the giggles and Harry helped Ron up, laughing as well.

The free period went very quickly, and Harry, Ron, Bree and Luke spent their time in the Common Room, lounging on the chairs, and relaxing. Bree was excited and hyper, and spent most of her time flicking her wand and accidentally setting Ron's hair on fire.

'Agumenti,' said Harry, putting it out.

'Wow, can you teach me to do that?' asked Bree. All too soon the bell went, and after break they made their way to charms. Harry, Ron and Luke all looked distinctly soggy, having been caught by stray water jets from Bree's wand. Charms was fun; Bree and Luke did very well considering they'd never even held a wand before. Flitwick didn't give them any homework, and they all went to lunch in a reasonably happy mood, except for Ron, who still couldn't get the hang of non-verbal spells, and had to practise that night for tomorrow's lesson.

'S'alright for you,' he grumbled at Bree over the shepherd's pie, 'You haven't been doing verbal spells all your life.' Bree chose wisely not to answer. She was too happy to start a fight, and excited about her lesson with the Doctor. She wanted to see what all the Hogwartian's reactions would be.

The Doctor set her and Luke aside when they all arrived at the classroom.

'You guys have done all this before, so you're going to do an advanced course.' He gave them some books, told them where to start, and set them off. Casting a silencing charm over them, so they wouldn't disturb his lesson, he turned to the rest of the class, a grin as big as a peeled banana on his face.

'So, Physics!'

A/N: I would like five reviews before updating the next chapter, as I haven't had a single one yet! So review, or no Chapter 6!