Disclaimer: This is the only time this will appear. I make no money from this. I don't own the toys, I just play with them.

A/N: So, this is a small first chapter of a plot that's gotten stuck in my head. It's not a typical crossover in that any appearances from Doctor Who characters will likely be small cameos, but I don't know yet. This story is subtle. At the moment my plans for it involve simply fixing things I don't like from the original Harry Potter, basically saving people. I'm not sure what to do with it beyond that but I do have a whisper of a plan to bring the OC from this chapter back. What I would like to know is if you, dear readers, would like to see this story continue. Please comment if you would like it to continue and also if you have any suggestions. But know that I already have plans for the triplets. I'm already working on chapter two. If the story is not liked, it will probably be the last chapter.

Harry Potter: Time Lord

Chapter 1: Luna's Prophecies

.oOo.

"Professor Potter?" a voice called from the fireplace in the Headmaster's office.

"I'll be with you in just a moment," called the voice of a 151-year-old Harry Potter from another room. Only seconds later, the shuffling of feet and the thump of a staff could be heard as an old man, looking frightening like the late Headmaster Dumbledore but with radiant green eyes walked into the office. "Ah, hello, Amelia. What can I do for you?" Harry asked the granddaughter of Susan Bones.

"It's the Lady Luna, sir," she replied with a hitch in her voice. "She said 'It's time' and that you would know what that meant."

"So, it is," Harry replied sadly. "I shall be by in just a few moments," he said.

With a sad nod, Amelia's face disappeared and the flames changed from green back to yellow and orange.

Harry closed his eyes and concentrated. Soon, with a light tap of his finger on the staff he was slightly leaning on, a brilliant white stag shot out of glowing crystal in the top of the staff and bolted through the door of his office, on its way to inform the deputy head of Hogwarts of his departure for the evening. With another tap of his finger, the entire length of his staff glowed blue and an instant later, the office was empty, save for the portraits of the past Headmasters.

When he arrived at Potter Manor, he moved faster than his old bones should be able to carry him until he reached the door to Luna's room. Opening it gently, he stepped inside.

"Harry!" Luna called out from her bed as her lips curled up into a weak yet bright smile.

"Good evening, Luna," he said as he returned her smile with a sad smile of his own.

"Don't you get all mopey on me, Potter," she told him sternly before she coughed and lay back deeper into the bed. "You know that I have been waiting for this day for a long time."

"That doesn't mean I won't miss you, my dear," he replied sadly. "You've been my best friend, really more like a sister to me, for over a century. It was only because of your efforts that I survived after the war."

"I'm sorry, Harry. I know you didn't want to survive, but you needed to," she told him gently as she took his hand in hers while he sat on the edge of her bed. "You still have a lot of work ahead of you, Harry, and many more lives to save."

"I'm old, Luna," he said with a chuckle. "I suspect it won't be much longer before I meet you again."

"You know about my gifts," Luna said sternly as her eyes glowed white and her grey hair changed to bright red, displaying her anger, before both faded back. "You still have eleven years before you go onto your next great adventure," she said in a much softer tone.

"What makes you say that?" he asked her curiously.

"It is part of the prophecy I was given," she told him, causing him to groan and herself to chuckle. "Yes, Harry, there is another prophecy about you. But, it is not a prophecy. No, it is the last prophecy of this world."

"That sounds… ominous," Harry said with an arched eyebrow.

"It does, doesn't it," she said with a chuckle followed by another cough.

"Maybe you should get some rest and wait to tell me the prophecy tomorrow," he said as he stood and pulled another blanket over her.

"I only have minutes left, Harry. But either way, I can't tell you the prophecy."

"Oh, thank Merlin," he said with a chuckle while trying to ignore her comment about having only minutes left. "Just out of curiosity, why can't you tell me?"

She looked at him with a faint smile. "If I told you, you would try to prevent it."

"Luna," he said with a groan that ended up sounding like a whine, an odd noise from such an old man.

"It's time, Harry," she said weakly. A half a second later and the room erupted with the appearance of more than a dozen fireballs that faded quickly.

"Fawkes?" Harry asked in shock as he stared at the Phoenix. "And I see you brought some friends. What's going on?"

One of the majestic birds that came with Fawkes hovered just over Luna. That was when Harry noticed the immortal bird held an egg gently in its claws, before setting it down on his friend's stomach. The aged Headmaster of Hogwarts School of Witchcraft and Wizardry stared in shock at what he was seeing as the Phoenix hopped up into the air again and joined the others to hover in a circle around Luna.

"Goodbye, Harry Potter," Luna said with her old, dreamy smile back on her face. "I will see you again in eleven years."

"Goodbye, Luna," he said softly, with a tear rolling down his cheek.

Suddenly, each phoenix burst into song, but a song that Harry had never heard from Fawkes before. As they sang, they all began to glow with a strange purple energy that began feeding into his friend. Worried, Harry tried to take a step forward, only to find he was rooted in place.

With tears streaming down his old and wrinkled face, soaking his long white beard, Harry watched as Luna burst into brilliant purple flames. Her blankets slid away from her body, surprisingly undamaged by the flames and also surprisingly not causing any movement from the egg that was placed on her as the blankets simply slipped away under it. Over the course of a minute, all that was left was a large pile of ash in the bed.

Harry watched in awe as each Phoenix landed on the bed, nudging around with their beaks in the pile of ash. He was astonished when there was suddenly movement from the ash and he stared as three tiny little heads emerged.

"Triplets!?"

.oOo.

Eleven Years Later

Harry looked around the Great Hall at all the students finishing up the breakfasts or packing magical laptops into their bags, while a few were furiously typing away still in an effort to make some last-minute adjustments to their homework assignments. After the Blood War, it had taken only a decade for the remains of magical Britain to stamp out most of the bigotry that was left and eventually embrace technology.

He and Luna had spent they're more than a century of friendship doing research into ways for making electronics compatible with magic and then finding ways to incorporate technology with magic. She had some of the wildest ideas, some of which he was still working on, whereas Harry had invented four computer programming languages, two of which were still in use to this day, A Sharp and R Sharp, based on Arithmancy and Runes respectively. One of his proudest moments was when a student came up with a way to combine the two into a new programing language that was simply called ARE, for Arithmancy, Runes, and Energy. The student had been awarded the Order of Granger, First Class for that.

Harry sucked in a breath as his musings came to a screeching halt and his eyes started to mist over before he managed to blink back the tears. He cursed himself for having created the Order of Granger in honor of academic pursuits. Not that he thought it was a bad idea, but that any time he thought of that award, he would be reminded of the love that almost was.

"Are you alright, Professor?" a student asked as she noticed him still sitting at the head table after the Great Hall was completely cleared out.

"Quite alright, Jenny," he replied, shaking his head to clear his thoughts. "Just remembering the past and pondering 'what ifs' is all."

"Would you rather postpone today's session?" she asked him carefully.

"That won't be necessary," Harry replied with a twinkle in his eye as he glanced at the seventh year standing before him as he grabbed his staff and stood up gingerly. "I have a feeling that today is the day we make the project work."

"You really think so?" she asked brightly as she fell into a casual pace at his side. Jenny was extremely grateful for this opportunity to work on such an important project with her mentor. The idea of creating a magical reactor that could create unlimited energy, impenetrable wards, or even more rooms of requirement, it was a staggering possibility.

"I do believe so," Harry replied as they reached the end of the seventh floor corridor. "I am, however, getting quite old. Could you please manifest the room we need?"

"Certainly, Professor," Jenny replied as she passed back and forth in front of the original Room of Requirement. After the third pass, a door appeared and slid open automatically. When they walked inside, it was to find a workroom with research littered all over the desks and benches, and what looked like a broom closet sitting in the center of the room.

Harry approached the closet and tapped the faintly glowing crystal of his staff to the door. The click of it unlocking could be heard before the double doors swung inward, revealing a space that was obviously much bigger on the inside than the outside.

"I never asked," Jenny realized as she stepped in. "How come you made it look like a broom cupboard?"

"Simple camouflage, my young friend," Harry told her. "Should anyone accidentally stumble upon this room, it would look like just some more storage."

"Sir," she spoke as she paused on the first step of the stairs that would take her down to the sub-floor allowing her to work on the undersides of the consoles that surrounded the main center column. "I took a walk around when taking a break on the rune carving the other day. It's like you have a whole other castle just inside this little box. I can't help but wonder, how many space expansion charms did that require?"

Harry chuckled at her curiosity. "I should have known better than to try and slip that by a Ravenclaw. The truth is, I didn't use space expansion charms. I have discovered how the Room of Requirement was designed, as a sort of pocket dimension, like a smaller soap bubble attached to a larger one."

Jenny's eyes went wide as dinner plates at the admission. "Seriously?"

"Indeed," he replied with a smile. "Now, when you've got everything set up down there, let me know when you are ready and I will send the next sequence of runes to your laptop."

.oOo.

After a short lunch break and a few more hours of work, Harry was interrupted from his last bits of research by a yelp from below.

"OW!" Jenny shouted. "Sweet Merlin that hurt!"

"Jenny?" Harry asked as he made his way down the stairs as quickly as he could. "What happened? Are you alright?"

"I'll be fine in a little bit, Professor," Jenny said as she was visibly flapping her right hand about. "Just lost feeling in my right arm at the moment. I was trying to start on carving the second to last rune of the last sequence you sent down when the bloody thing zapped me with an electric shock."

"It… zapped you?" he asked, blinking owlishly.

"Yes, sir. About a hundred times worse than any stinging hex I've ever felt."

Harry peered at the many sided ball shaped dark purple crystal that formed the heart of the prototype reactor. "Hmmm, I wonder."

"Whachya thinkin, Professor?"

"I do believe that there is already a relatively small amount of energy building up in the reactor," he told her. "It seems that the final two runes cannot be carved by hand because they are the sealing and activation runes."

"But… if I can't carve those final runes, it won't be finished," she said dejectedly. "All our work will have been for nothing."

"I'm a little surprised at you," Harry said, turning to look at his protégé thru his wire-rimmed glasses. "Giving up already?"

"What else can we do?" she asked in confusion. "It been an established fact for centuries that spell carved runes are not permanent and permanent runes can't be carved by machine, they have to be carved by hand."

"While that is partly right," he corrected her gently, "what the conventions on rune carving actually state is that a machine cannot carve runes because it requires an intelligent mind to make them work and thus hand carving is the standard."

"Is… isn't that what I just said, though?" she asked, looking deep in thought.

"It just takes a little creativity to work around the standard conventions," he told her with a smile as he closed his eyes and turned back to face the reactor core. With a single thump of his staff, the carving tools that Jenny had dropped leapt into the air and began carving the second to last rune. It was a slow process that required all his concentration as massive bolts of energy arched over and through the tools, but as soon as that rune was carved, it all stopped.

Jenny's eyes were bulging as she watched her mentor work. "How did you do that?"

"I used my magic like a third arm," Harry replied as he slumped against the railing of the stairs. "I also created a tiny layer of super dense air to work like a glove for the magic hand so that the power discharges would not feedback through my magic."

"That's brilliant!" she said before realizing just how exhausted the Professor was. "Sir, we can finish this another day. We should get you to dinner and then get a full night's rest."

"That does sound like a good idea," Harry said as he straightened up and leaned on his staff. "A good, filling meal is just what I need right about now."

.oOo.

The next morning at breakfast, everyone could tell that something was wrong. The teachers were all conferring at the head table, but Jenny noticed there was someone missing as she got a sinking feeling in the pit of her stomach.

"Can I have your attention everyone?" the Deputy Headmaster spoke up, looking sullen and lost. When all the chatter quieted, he spoke again. "Thank you. I'm afraid I have some sad news for you all. Early this morning, it was discovered that Headmaster Potter has passed on to what he affectionally referred to as the next great adventure. His last request, which he managed to write down in his last moments, was that classes be canceled for the week. He stated that he does not wish you to mourn him, but he wishes you all to use this time to reflect on the changes our society has gone through in the last two centuries since he knew many would not be able to focus much this week. While he asked that we not mourn his passing, I know many of us will anyway, if only because he will be so sorely missed. However, the memorial service to be held on Thursday evening will not be to mourn his passing, but will rather be to celebrate his accomplishments as well as an opportunity for those that wish to do so to speak of good memories we have of him."

For a moment, everyone stared at the head table in shock. No one wanted to believe it. After several seconds, Jenny felt the tears well up in her eyes and she bolted from the Great Hall.

It was a few hours before she was found crying silently on top of the Astronomy Tower. "Miss Evans?" her Professor called softly to her as he approached.

"Professor Lupin?" Jenny asked hoarsely as she looked up. "I… I need to be alone right now," she told him.

"Please, call me Teddy," he said softly. "If you wish me to leave, I will in a moment. I have to tell you something though."

"Huh?"

"There was more to his last wishes that were not revealed at breakfast," Teddy said.

"I don't understand," Jenny admitted as she wiped some tears away with her sleeve.

"Did the Headmaster ever tell you about his best friend?"

"Just that she helped created a lot of the technology that we were working with," Jenny told him, wondering where the conversation was going.

"She was also a seer of sorts," he replied. "On her deathbed, she told him that today would come, so he was prepared for it. He left this for you," he said as he pulled a battered old parchment from his pocket and handed it to her. "He said that the password for your workshop would unlock it, but none of us knows what that means."

"We were working on a project together," she said with a sniffle as she took the blank parchment and slipped it into her own pocket. "The workshop is sealed and password protected because the project was not complete."

"Well, there you have it then," he said with a sad smile. "I know you were very close to him. Did you know that he was my godfather?"

Jenny looked up at her defense professor in surprise. "He was?"

"Yes. My parents died in the Battle of Hogwarts. I wasn't even a year old yet, but they made him my godfather because he was close to them both."

"I didn't know, I'm so sorry."

Teddy gave her a watery, sad smile. "It's quite alright. I just wanted you to know, I understand how you must be feeling. If there is anything I can do for you, let me know."

"Thank you, Professor."

"You're very welcome, Miss Evans," he said as he stood and left the tower.

That evening, after a very somber dinner, Jenny walked to Professor Lupin's office, knocking softly.

"Miss Evans, what can I do for you?" he asked, surprised to see her already.

"I just wanted to give this back to you, sir," she said as she pulled the old parchment from her pocket.

"No, no, that was something left to you, Miss Evans."

"He only left it to me to pass on a letter about our research, sir. He stated in the letter that his time was running short and this was all he had on hand. He specifically asked that I give it back to you and also to tell you that the original password that Mooney set for it will still work."

Professor Lupin's eyes went wide at that. "M-Mooney?" he asked in awe.

"Yes. Are you alright, Professor?"

"Fine, fine, I assure you," he said as he collected himself and took the parchment reverently. "It's just… this parchment is actually a map that my father helped create."

"Then it certainly belongs to you, sir," she said with a faint smile. "Goodnight, Professor."

"Goodnight, Miss Evans."

.oOo.

That night around midnight, Jenny left the head girl suite and made her way to the Room of Requirement. Pacing three times and giving the password silently, she stepped into the workshop and stopped in her tracks.

Around the room, all of the workbenches and desks were cleared, there was no more mess of papers and tools scattered around. Most notably, the broom cupboard they were using as the base of their project was also gone.

Walking over to the one desk that still had something on it, she found a trunk, two parchments, and a staff identical to the Professor's, but with her own name carved into it. Picking up the staff, she felt warmth flow thru her and the crystal at the top glowed with a bright purple light. Picking up the parchment next to it, she was surprised to find it was actually a stack of three parchments, Mastery Diplomas for Arithmancy, Runes, and Charms, with her name on them.

Dropping the stack back onto the desk in shock, she shakily picked up the other parchment that was next to the trunk and found it to be a letter from her mentor.

My Dear Friend,

I don't want you to think that my "last" thoughts of you involved disappointment. Yesterday was a long day full of hard work. I do not fault you in the slightest for not thinking of a way to carve those last runes.

I want you to know just how brilliant you are. Those masteries I granted you next to this letter were not on a whim. They are official and registered. You are a truly gifted young woman and have earned them and then some. I am proud and honored to call you a colleague and friend. You may be wondering why I created a new staff for you rather than just leaving you mine. When you discover that mine was never recovered, I'm sure that keen mind of yours will put it together.

Inside the trunk, you will find a massively expanded space. Within is a replica of this lab, a stockpile of materials, as well as a complete library of all the research I have been a part of. I leave this all to you because you are a true friend and as far as our society has come, I still do not completely trust the Ministry.

Speaking of the Ministry, this is where I leave you with a terrible burden. Well, that might not be quite true. The reason I call it a terrible burden is because when I was young, there was a prophecy about me that I am sure you are aware of. In the Hall of Prophecies, there is an Orb with your name on it. That means you are the only person able to pick it up and hear it. Should you decide to do so, I recommend you take the Portrait of former Headmaster Dumbledore with you. He was my mentor and always had good advice for me. I would suggest you take my Headmaster Portrait along as well but… well, you'll figure it out.

Lastly, on a desk in the library section of the trunk, I have left a journal detailing what I have been planning for over a century. I ask that once you've read it, you do not follow exactly in my footsteps. If you do, there is no turning back nor any chance to return to the home that you know.

Thank you, Jenny, for being a wonderful friend and for helping me to complete my work.

Your friend,

Harry Potter

Headmaster, Hogwarts School of Witchcraft and Wizardry

Jenny put the letter down with tears streaming down her face, but a faint smile.

.oOo.