This is another new story I'm working on! I would start this after my Fire Emblem story, but awakening is a large game and I thought to do this during that story. I'll upload chapters of this story after another chapter of Fire Emblem: The new Emblem is uploaded. So expect updates of both after the other has a new chapter.

I've always like Doctor Who and Harry Potter crossovers, especially when the monsters come to Hogwarts. Some stories like this like Changes by BiJane which is good so I thought to do one of my own.

I'll include some of the most popular monsters in the later years, but I saw a certain Twelfth Doctor episode and decided to include it in this story. If you've seen the episode, how the monster is alive will be explained later.

Harry Potter belongs to J.K Rowling and Doctor Who belongs to the BBC.

Enjoy!

"Lily, grab Harry and run! It's him! I'll hold him off while you protect our baby! Just run!" James Potter yelled to his wife who was holding a blanketed baby in her arms.

"You mustn't James! He'll kill you!" Lily Potter cried out in horror as her husband brandished his wand and stood in a defensive position.

"Well do you have any other ideas!?" James yelled.

"There's... him," Lily said with difficulty to get the words out. James's eyes narrowed at the mention of this and hesitantly...

"Fine," James said and he along with his wife raised their wands to the sky and chanted "Vocans Doctoris, nisi pue.," A beam of light left their wands and went out into the deepest depths of space. On the way, it passed by planets that played host to alien species and spaceships that would come to Earth in the near future.

The beam of light suddenly found itself lost all of a sudden, but it was quick to find its target again. It never knew how it got lost, it was looking at a church of some sort and when it looked away, it completely forgot all about it and went to its destination: a blue police phone box flying in the orbit of Pluto.

But we'll talk about that later. Right now on Earth, James held his guard as the door burst down and in stepped a man that had been terrorizing the wizarding world for the past couple months. A man who had killed hundreds, a man who was the nightmare of every child, a man who had effectively killed Frank and Alice Longbottom. His name was Tom Marvolo Riddle, better known as Lord Voldemort.

"Get out of my way Potter and you shall live," the Dark Lord hissed angrily.

"You want my boy, you'll have to get through me," James growled standing his guard with his wand raised. He knew he was going to die at the hands of the darkest wizard of the universe. But scared as he was, he was going to protect Lily and Harry with his very life.

"Foolish man, Avada Kedavra," Voldemort sneered. He raised his wand which fired the killing curse, striking James in the chest dead on, killing him instantly, making his body slump to the floor lifeless.

The Dark Lord proceeded to stroll upstairs to the child's room. He would have to reward Wormtail for ratting out the Potter's house in Godric's hallow later, or he could just dispose of him. Either one would work.

He reached the child's room which was locked. No doubt it was the Potter lady's last pathetic attempt to save her baby. Voldemort cast the same curse which he used to blow down the front door and entered. Inside was Lily Potter clutching her baby defensively, her face masked with terror.

"Give me the child and you shall live," Voldemort made his reason for being there loud and clear.

"No! Take me! Please! Have mercy I'm begging you!" Lily begged pathetically.

"Give me the child. NOW," Voldemort snarled ignoring her request raising his wand.

"OVER MY DEAD BODY! REDUCTO!" Lily screamed and fired the disintegrating curse which made contact with the Dark Lord, yet it appeared to do no damage to the monster.

"Avada Kedavra!" Voldemort shouted and fired the signature killing curse which sped towards the woman in a green burst of light. Time seemed to slow down for Lily as she grasped her baby and used her very magic core to transfer her magic to him, which would save his life.

"This is the end for me..." Lily thought to herself sadly as her time was coming to an end. "Be safe Harry, know that your father and I will be with you wherever you go. Doctor, please take care of our beloved little boy and show a new world that he will enjoy."

She thought about the time when she met a man called the Doctor who was a Time Lord from the planet Gallifrey. It was an interesting experience as he saved the Wizarding world from aliens called Zarbi, which went rouge from their planet's laws and tried to destroy Earth. But thanks to the Doctor, they were arrested by the Judoon and were taken away to who knows where. Before he left, he gave Lily a reminder of his visit in the form of a key of some sort. "I have no idea what this key is used for. It will be better in your hands," he said truthfully before leaving.

Her last thought before her body slumped to the floor was Harry standing next the Doctor in his cream coat suit and celery stick. (The Fifth Doctor in case you can't figure it out)

Voldemort walked towards the baby who had fallen out of his mother's arms and pointed his wand in his face. He paused to look at the infant. He had his father's looks but his mother's eyes. The Dark Lord almost felt pity having to kill this baby. ALMOST.

"...Avada Kedavra," Voldemort said without mercy as he fired the killing curse at little Harry Potter, who looked confused and slightly scared.

Then the impossible happened. The curse reflected off Harry and struck its original caster, who just looked dumbfounded as to what happened before the curse hit. The Dark Lord had his soul removed from his body in not a nice way and the body of Lord Voldemort turned to dust. But as his spirit left the room, he smiled evilly as he knew of the Horcruxs and he would be back soon. He was dead... for now. But before anything else happened, the house burned down as Voldemort's spirit left its former body.

Meanwhile, near Pluto... (This takes place after Doomsday)

"No no no no!" The Doctor's frustrated shouts echoed throughout the TARDIS as he set the controls for 1981, Godirc's Hallow. He had received a distress call from two very old friends who he hadn't seen for a long time. His thoughts suddenly changed to Adric who had died in his fifth incarnation, filling his sadness even more because he had to say goodbye to Rose on Bad Wolf Bay. The signal started playing out its message on the computer.

"That's impossible," The Doctor muttered when the message ended. If Lily and James truly had died, then it would be up to the madman to take in Harry as his own. Something he was not prepared for, he was The Doctor! The bringer of the storm and destroyer of Gallifrey! And a father? It didn't make any sense.

He was snapped out of his reverie when he heard it. That's impossible. As the TARDIS sped inside the Time Vortex, something else had appeared inside the machine. It was another TARDIS.

"WHAT!?" was the Doctor's shocked response. It was impossible; all the TARDISES in the universe were thought to have been destroyed in the Last Great Time War. How was there another on his TARDIS?

"What are you..." the Doctor muttered to himself as he soniced it with his screwdriver. It was a TARDIS, but how? It was impossible; it had to some sort of trap. Its design was a blue police box just like his! In fact, the somewhat distressed Time Lord felt the sheer confusion of his own TARDIS as it made a very loud groaning noise.

"Yes I know that something impossible just happened, but there's no need to get all jumpy about it!" The Doctor hushed the TARDIS as calmly as he could, which wasn't very calm. He then put his hands on the new TARDIS doors and prepared to open it.

"Allons-y!" The Time Lord opened the doors and was in for the shock of his life. This TARDIS interior was identical to his TARDIS in every possible way.

"WHAT!?" could be heard all the way to the Shadow Proclamation where the Judoon thought they were under attack, and it took a while before the Shadow Architect could bring order to the shocked rhinos who were already arming their battleships.

But back inside the second TARDIS which was inside another TARDIS, The Doctor was examining the new TARDIS'S controls. They were the same as his, if not a little bit less advanced. The shocked Time Lord went straight to the computer to check its history. The machine was deadlocked as it denied the time lord all access.

"Should have known that it had a deadlock seal..." The Doctor muttered as he pulled out his sonic screwdriver and tried to get past the seal. But as he did, 'Welcome Doctor,' came up on the screen.

"Well that's interesting," The Doctor said as he went though the options when he heard a thud. He rushed out of the TARDIS to find that his TARDIS had stopped running; he had landed.

"Well then," The Doctor started as he approached the doors, "Show time." He opened the doors.

Back at the Potter residence...

Professor Albus Dumbledore was in a pickle. Two of the greatest wizards in the UK had died and yet only their heir had survived. Harry came out alright with a few burns and a lightning bolt scar on his forehead which held a piece of Voldemort's soul. As if that wasn't enough, his godfather Sirius Black was in Azkaban and the Dursleys died in a car crash. The old man was at a loss what to do when he remembered.

The Doctor. He remembered in 1975 when he came and saved Hogwarts from giant ant aliens called the Zarbi. He was hailed as a hero and even though he was rewarded handsomely, he refused to accept the gifts and left swiftly in his police box. An amazing number of jaws dropped as it disappeared from the Hogwarts grounds. Nobody could figure out this mysterious man.

The old wizard was about to cast the summing spell when he heard the familiar noise of the TARDIS materialising in front of the house and then a man stepped out. Dumbledore didn't quite recognise him but he had a theory who he was.

"The Doctor I presume?" he inquired.

"That's me! I didn't think you would recognise me after all these years," The Doctor said, surprised as to how the elderly wizard recognised him.

"There's only one man who saved the school from those aliens. I must say though, you look a lot different from then," Dumbledore said in a grandfatherly tone curious as to why the Doctor looked a lot different from 1975. He wasn't wearing his English cream coated suit and was instead wearing a brown conservative business suit with a blue shirt underneath. He also wore red Converse sneakers.

"Yes well to make it short, something happened involving a cave and I... changed," The Doctor explained struggling to find another word for Regeneration. "I wished I was ginger though!" he added and complained at the same time causing the old wizard to chuckle.

"While I would be intrigued about this information, I think we should focus on the reason that we're both here?" Dumbldore said turning The Doctor's attention to the destroyed house.

"Right," the Doctor said walking towards the destroyed house with Dumbledore behind him. With the old wizard's assistance, he was able to unearth the dead bodies of Lily and James Potter.

"Lily, James, I am so sorry," The Doctor grieved for his friends and he couldn't help but shed a tear. The twinkle in Dumbledore's eyes appeared to go out, something which didn't happen very often.

"And so am I Doctor, but know that they will always be with you wherever you go in your alien world," Dumbledore gave some sage advice which softened the Time Lord a bit.

"What about Harry?" the Doctor asked nervously. Just then, a baby's crying could be herad across the field where said infant was being held by a giant of man, who was coming over.

"'ave 'im here Professor Dumbledore, little tyke got 'imself burned and the cut on his 'ead, but e should 'right," the giant reported and handed Harry to Dumbledore who took him in his arms.

"Thank you Hagrid," Dumbledore said and offered the baby to the Doctor who nodded and took him after a slight hesitation.

"Well Professor, if you allow me to take Harry here, there are some things you must know," The Doctor said. Dumbledore quietly signalled Hagrid to leave as this would be a private conversation.

"First things first, I know all about the Prophecy," he stated, making Dumbledore frown.

"I see, I am sorry Doctor. I didn't mean for any of this to happen, I just wanted Harry to have a good life like his parents and now he is a fragment of Voldemort. I am so so sorry," The ancient wizard apolsigesd over and over again until the Doctor put a hand on his shoulder.

"It's not your fault Albus, you didn't see this coming. But know this, I've heard of many prophecies before and I ruined each one. You can be sure that I will find a way to dispense with this one." The Doctor comforted Dumbledore whose twinkle slightly returned to his eyes.

"Thank you old friend. I would say that attempting to break a prophecy in the Department of Mysteries is impossible, but I'm sure you have your strange ways," Dumbledore said, with the Doctor growing a slight smile on his face feeling a bit better than a couple of hours ago.

"Well fancy this, my strange ways will make sure that Harry doesn't die. I swear on behalf of Gallifrey!" the Doctor said with new found confidence.

"Excellent Doctor." Dumbledore said, the twinkle in his eyes fully returning to their glory. He then pulled out his watch and checked it. "If you excuse me, I need to go to the Ministry and announce this news to the public." The wizard put his watch away in one of his many pockets which were filled with... things that Albus Dumbledore liked, such as the Elder Wand and those different flavoured beans that wired flavours like liver and dust.

"Suppose we'd best be on our way too, although keep in mind Harry might be better at... my line of work than magic when he comes back," the Doctor warned.

"I knew you were going to say that, so perhaps I should look forward to seven interesting years of Hogwarts," Dumbledore joked, causing a well deserved laugh from the Time Lord. The two warmly shook hands and went their separate ways with Dumbledore apparating away from the Time Lord to the Ministry of Magic, where Cornelius Fudge was eager to know what happened to Lily and James Potter.

"Well Harry, It's just you and me. I really could do with someone to talk to after what just happened," The Doctor spoke to the baby who just looked curiously back at him.

"Dadda!" Harry said suddenly. The Doctor could understand him due to his power to speak baby.

"Hey your first word! You're a growing boy Harry, we're gonna have so much fun together, it's gonna be absolutely fantastic!" The Doctor cheered, quoting his previous incantation as he and Harry went into the TARDIS, which slowly disappeared into space. The Doctor took this opportunity to show Harry around the TARDIS and even the new one that just appeared, when suddenly he got struck with a brainwave.

"I think we know what your birthday present is," The Doctor exclaimed with a smile, thinking of giving the new TARDIS to Harry in the future when he was about ten or so. But right now, the Time Lord was caring for Harry by gently rocking him to sleep in his arms while getting himself ready for his and Harry's next and newest adventure.

But then he heard footsteps behind him. A woman in a white wedding gown had appeared in the TARDIS...

And this is chapter one done! I'm a big fan of Doctor Who and I really hope this turns out fine. Sorry If I didn't really capture David Tennant's doctor, but I tried to make him serious due to the situation that he's in. Then again he's always like this in a situation like this, so either way, please let me know if I did his character well.

Kudos to anyone who figured out who the monster is in this story. Have a Jelly Baby if you did.

Please leave a review on how I did, I'll try to answer questions, and I'll see you all in chapter 2!