And now I'm messing with cannon. I hope it turns out well.

Disclaimer: I own neither Harry Potter nor Doctor Who


"Dad!"

"Yes, Lunette?"

"I'm going to go find the cafeteria or something. I'm hungry," Luna told the Doctor, who was lying comfortably propped up on pillows in a hospital bed, completely healthy.

"Be careful, keep an eye out," he warned her. Once upon a time, he would have asked Will to go with her. "And if anything happens, find me, okay?"

"Yes, Dad."

She wandered down the halls, looking for something to eat but not particularly caring how long her detours were. Curiosity was part of her chemical makeup, the Doctor had once said, and she couldn't resist a look at all the equipment. She kept out of the way, mostly, trying to name the parts and what they did. Not that she was particularly knowledgeable about most of it – much as the Doctor taught her, and despite everything she'd picked up during their travels, hospitals were one of her dad's least favorite places and he tended to avoid them.

She did make it to the cafeteria despite her numerous detours. There she found a seat by a window and munched on a banana, watching people. They were more interesting than the rain pouring down outside. It was lunchtime, and the room was filled with the buzz of conversation. Patients and doctors and family members chatted at the linoleum tables. Normal everyday humans, her dad would say, amazed. Amazed by the normal things, the mundane. Maybe because that was what he could never really have, Luna reflected. Even their own domestic life style wasn't really calm or every day. It was running and explosions and magic and seconds left on the countdown and nick-of-time rescues. And fun, of course, wonderful brilliant fun, but not exactly 'normal.'

Luna was pulled from her musings when people began to point to the windows in shock. They began crowding around tables staring at the rain, and pulling out phones. Luna looked around, trying to see what they were all staring at.

The rain was going... up?

Seconds after she processed that the entire building shook, and the people in the cafeteria went from pointing in amazement to falling over each other, crying in surprise and fear and shielding their eyes from the light that was suddenly streaming through the windows. It didn't last long, maybe thirty seconds, and then the light cleared and people slowly sat up.

Luna had tumbled under a table along with a medical student she vaguely remembered from her wanderings that morning. The student jumped up immediately and ran off, most likely to check on patients. Luna got up more slowly, taking in the scene, both inside and out.

They were on the moon. Well, that was different. Not that she minded; she had always liked the moon. She had been named after the moon. Not that that was particularly important at the moment, of course.

The humans, the wonderfully normal humans, were not quite calm about the change in scenery. They were crowded at the windows, panicking, running down the halls. Luna sighed. They'd all be fine, she was sure. They had air which meant a force field of some kind which meant that someone was keeping an eye on them and didn't want them all suffocating. But still, having about a thousand panicked humans crowding the halls might make it difficult for Dad and her to figure out what was going on.

Speaking of Dad… she supposed arriving on the moon probably counted as 'something happening' and she would have to find him. Which would mean picking her way through the panicking masses. Not to mention locating him in the first place.

It was times like this the bond came in useful. Even if they couldn't communicate clearly it did a fine job when it came to finding the other. She used it now, feeling along it like it was a tether, looking for her the mind of the Doctor, the warm, caring light at the end of the tunnel.

Reception, mezzanine. Only one floor down, thankfully. She carefully picked her way through the panicking people and ran towards her dad.

He was hiding in some ferns, with another person, a pretty, dark-skinned medical student. They were talking animatedly, and Luna caught a reference to a little shop as she approached from behind.

"They're after something non-human. Which is very bad news for me," Dad was saying.

"Why?" the young woman crouched next to him asked. Luna smiled to herself as her dad turned to give her a Look. "No. You're kidding me," she insisted.

"He's not," Luna told her, crouching on the other side. The Doctor turned to look, relieved that she had appeared. Not that he didn't trust in her to keep herself safe – the tricks in hiding and conning she had picked up off the street had come in handy in many situations where her safety was at risk – but he didn't like the thought of her wandering around when everyone was twice as tall as her and running around screaming.

"Luna! There you are, how was lunch?"

"Fine. I was interrupted by our landing."

"Um, wait," the medical student interrupted. "Not to be rude, but who is she?"

"Oh, right! Luna, Martha Jones, doctor-in-training. Martha, this is my daughter, Luna."

"So you're an alien and you've got a kid?"

"Yes," Luna answered for him. "I'm an alien too. Hello!"

While Martha gaped, Luna caught sight of the aliens.

"Those are Judoon," Luna noted, ignoring Martha's surprise. "This will be fun."

"Right! Come on then!" the Doctor exclaimed, grinning and running off. Luna smiled impishly and followed him, as did Martha, though not after looking at the two of them like they were insane. Well, maybe they were, but like Oscar Levant had once said, there's a fine line between genius and insanity.

Behind them, the Judoon were splitting up between the different floors, having finished cataloguing the lobby and reception area. The Doctor led them up the stairs to a nurses' station the sixth floor where he fervently flipped through medical records. The Doctor was busy sonicking the computer and Luna moved back, staying out of the way while he worked.

"They've reached the third floor," Martha said, catching up. She paused and looked at the sonic screwdriver "What's that?"

"Sonic screwdriver," Luna replied.

"Well if you're not gonna answer me properly," she huffed.

"It is. Really. It's a screwdriver, and it's sonic. He says he built it while he was bored. It's quite useful."

"What else has he got, a laser spanner?

"I did, but it was stolen by Emily Pankhurst, that cheeky woman," the Doctor interrupted, attempting to pull the conversation back to the matter at hand. Not that he minded trading stories, but they did have things to do.

"Argh!" he exclaimed, glaring at the computer. "What's wrong with you? Judoon must have locked it down. The Judoon Platoon, upon the Moon," he inserted, grinning to himself before focusing again. "Cos we were just traveling, I swear, we were just wandering, I wasn't looking for trouble, honestly, I wasn't. But Jack noticed the plasma coils around the Hospital – that lighting, that's a plasma coil, it's been building up for two days now – so I checked in, I thought something was going on inside. Turns out the plasma coils were the Judoon, up above."

"But what are they looking for?" Martha wanted to know.

"Something that looks human but isn't."

"Like you, apparently," Martha said with a touch of disbelief.

"Like us," Luna confirmed. "But not us."

"Haven't they got a photo?"

"Might be a shape-changer," the Doctor replied off-handedly.

"Well whatever it is, can't you just leave the Judoon to find it?"

The Doctor paused what he was doing momentarily to look at the two girls. "If they declare the Hospital guilty of harboring a fugitive…" he trailed off, turning back to the computer. "They'll sentence it to execution."

"All of us?" Martha asked incredulously.

"Really?" Luna echoed. She knew what the Judoon were – interplanetary thugs who typically worked for the Shadow Proclimation and spoke a rather strange language (that she knew, incidentally, thought not very well) – but not exactly how they operated.

"Oh, yes. But if I can find this thing first…" the Doctor paused, smacking the monitor he was looking at and glaring. "Oh, d'you see? They're thick, the Judoon are thick, they've wiped the records! That's clever!" he shouted at the computer, making his point known that he didn't think it was clever at all. Behind him, Martha asked something about what they were looking for, and Luna answered for him. Smart girl, he was glad to have her along. Made it easy to keep working and not have to answer the inquisitive ones. Not that he minded the inquisitive ones. Actually, he was beginning to think almost-doctor Jones would make a fine addition to their TARDIS team. Not that she would replace anyone, of course, he just thought they were in need of a new face, a new take on problems, and she really was smart, brilliant in fact…

"She's the nightingale, I think," Luna said, derailing his train of thought.

"The nightingale?" the Doctor repeated, giving up on the computer.

"Who wants adventure," Luna explained.

"Who you think is coming with us," the Doctor translated. Luna nodded.

"It's faint, but I can see it. In the gold."

Seeing it in the gold, that was how Luna described it. They had decided, a few months back, that was her "Time Lord gift," her specialty. Seeing events in Time. Every Time Lord could do it, of course – that was part of what it was to be a Time Lord – but what Luna saw was unusually clear. Others saw like the Doctor did, they knew whether Time was in flux or fixed at the present. But Luna saw the events in a tapestry, picking pieces out, looking at things that were going to be and the big picture. It wasn't crystal, it wasn't set in stone, but it was a much better idea than what many had seen, long ago when the Time Lords had been numerous.

"Are you sure?"

"More and more so, every passing moment," Luna replied. "Be nice to her Dad. She won't understand for a while, so pay attention."

"Attention to what, Lunette?" he asked, but Luna didn't reply, instead nodding to the computer monitor.

"May I see it?"

"Hmm? Oh, yeah, sure," her dad replied, handing over the sonic and letting her work.

It took the two of them combined, but they got the back-up running again, just as Martha came running back.

"I found her!" she exclaimed, panting.

"You did what?" the Doctor asked. He didn't get an answer though, because the thing that had been chasing Martha rounded the corner, striding towards them. Immediately, he reached out and snagged Martha's hand, propelling Luna in front of him and pulling along their new companion – because really, Luna thought to herself while running towards the stairwell, there wasn't any doubt that she wasn't coming with them after this; she saw it solidly now.

They ran through the halls, careful to jump over people lying prone in the halls, and down the stairs, nearly toppling into the Judoon.

"Careful," Luna called as her Dad pulled them through the door to floor five, leading them down the long, mostly empty halls while the thing in black leather gained on them. They made it to an empty room and the Doctor locked the door behind them, shoving the two girls into a smaller area portioned off the main one by large glass panels.

"When I say so, press the button," the Doctor ordered quickly.

"I don't know which one!" Martha protested.

"Then find out!" he shouted back.

"I recommend the biggest one," Luna said sagely. Martha gave her a look and Luna shrugged. "It worked last time."

"Last time?" Martha echoed, grabbing the instructions manual. "No, wait, I don't want to know."

"Now!" the Doctor shouted as the leather thing broke down the door and charged in. Martha hesitated for a split second before following Luna's advice and hitting the large yellow button. Outside, in the main room, the leather thing lit up and then toppled onto the floor, motionless.

"What did you do?" Luna asked, watching her dad begin to twitch.

"Increased the radiation by 5000%. Killed him dead."

"But, isn't that gonna kill you?" Martha spoke hesitantly.

"Nah, it's only Rontgen radiation, we used to play with Rontgen bricks in the nursery when-"

"Really?" Luna interrupted. The Doctor frowned slightly at the interruption and Luna tilted her head and smiled, knowing he was showing off to the new companion.

"Yes really. It's safe to come out; I've absorbed the radiation. Now all I need to do," he paused, holding his left foot out a little, "is expel it out of my body and shift it into one little spot – say, my left shoe."

Martha watched him while he hopped up and down on one foot and then pulled off his sock and shoe and dumped them into a radiation hazard bin.

"You're completely mad," she got out finally. The Doctor looked down at his feet.

"You're right, I look daft with one shoe," he agreed, pulling off the other and wiggling his toes. "Barefoot on the moon!"

"Not what she meant, Dad," Luna whispered to him as Martha crouched next to the leather thingy. Her dad just winked at her.

"So what is it?" Martha asked, looking up at the Doctor. "Where's he from, Planet Zovirax?"

"Just a Slab; they're called Slabs," the Doctor replied, crouching next to Martha. "Luna?" he asked his daughter.

"Basic slave drones," she replied, trying to recall anything she had picked up on Slabs. "Er. Solid leather…"

"Someone's got a hell of a fetish," Martha muttered. The Doctor got up, going back to the x-ray camera. "It was that woman, Miss Finnegan, it was working for her," she continued, but the Doctor wasn't listening.

"My sonic screwdriver!" he exclaimed mournfully, holding it up so he could see the half-burnt appliance.

"She was one of the patients; she killed Mr. Stoker," Martha continued.

"It burnt out the sonic screwdriver!"

"Martha's trying to tell you something," Luna interrupted.

"But I love my sonic screwdriver," the Doctor replied sadly.

"Yes, Dad, I know," Luna comforted.

"Doctor!" Martha called, getting his attention.

"Sorry," he replied, tossing the sonic over his shoulder and grinning. "You called me Doctor!"

"Anyway," the doctor-in-training ground out. "Miss. Finnegan is the alien, she was drinking Mr. Stoker's blood."

"Odd time to take a snack," Luna muttered sagely.

"Unless…" the Doctor inserted. "No. Yes! That's it. Wait a minute… yes! Shape-changer!"

"Internal shape-changer?" Luna clarified. The Doctor nodded down at his daughter.

"She wasn't drinking blood, she was assimilating it. If she can assimilate Mr. What's-his-name's blood she can mimic the biology. She'll register as human. We've got to find her, show the Judoon. Come on!" he exclaimed excitedly, happy to have figured it out. Finally, they were getting somewhere.


Not every episode will be here and not every episode will be this detailed.

Reviews are, as always, welcome.