Once, not too long ago, before I was a Princess I received a visit from my future self, I was fascinated and began to question her about how she was even there. She put her hoof over my mouth to stop me from talking and she tried to warn me of something she started to light up and return to her time but the spell failed and a shockwave shot out knocking me and her to the floor.

"What happened? I should be back at Canterlot!" She said getting up and rubbing her head.

"I don't know" I said getting up and rubbing the back of my head.

"I don't understand, when I was you my future self was sent back when she was supposed to."

"So time has changed?"

"I don’t know. How am I supposed to get back to Tuesday? I don't know any spells that can take me to the future!!" My future self said starting to hyperventilate.

"Wait, calm down! All we have to do is to go to Starswirl the Bearded's wing of the archives and find the spell to get to the future." I said knowing how I can get.

My future self was calmed down by my reassurance, "You're right, we'll just head there and find the spell to get me home." She said heading out my...our door.

"Where are you going? The train for Canterlot doesn't even arrive for at least two more hours!" I called out after her.

"Doesn't matter! Found a 'Long Distance Teleport' spell when I was looking for the time travel spell!" She shouted back.

"But why are you running?!" I shouted trying to catch up with her.

"The spell needs us to be moving fast in the direction I need to teleport!" she shouted back.

Her horn started to glow and soon her body began to glow and so did mine. I felt myself go through a teleport and before I knew it I was in the canterlot archives. "Wow! You don't even look tired!" I said astonished.

"I know, this spell is so much easier to cast. I honestly don't know why we weren't taught it." My future self said as she began to loft books off the shelves, "Ok these are all the books that pertain to time magic."

"So let’s get down to business" I said as we started a long study session. We worked hard and read all forty-two books, but after several hours we found nothing that could send her forward, not even for a few seconds. We decided to ask the Princesses if they knew a way to send a pony to the future. We wandered the halls of the castle and made our way to the throne room.

"Princess Celestia we need your help!" I shouted as we entered the room.

"We need to know if you know any spells that can return me to the future!"

"Oh" she said looking distressed as she saw me and my future self. "Twilight Sparkle You used time magic? Please tell me you didn't touch each other!"

"We might have..."

"Oh no! If you've done that there's no telling what could happen. At least for the moment it seems that all it's done is make you stranded here. That problem should solve itself when the present Twilight travels back in time."

"But none of this happened to me!" My future self-pleaded.

"As I understand such things it doesn't matter if you come from an alternate timeline all that matters is that the present Twilight travels back in time to the same point you did, dressed as you did."

"But that doesn't make sense, if she is from my future then she has to happen"

"I honestly do not know, you see time magic is incredibly complex to the point where only one pony in all of existence understands it."

"Who" my future self and I sad in unison.

"He is an old stallion..." She trailed off.

"Oh..." my future self said lowering her head. “So all we can hope for is that your speculation is right"

"Did he leave a journal?" I asked.

"That mad old stallion isn't dead" Princess Celsetia said.

"But you said he was old." my future self said.

"Old not dead, however his understanding of time has allowed him to travel through it and I fear that he is lost."

A guard rushed into the room, "Your highness, there are monsters attacking Ponyville" he said after bowing.

"What sort of monsters, do they come from the forest?" The princess asked.

"I do not know. But they are winged and seem to have long barbed tails and large claws! We are sending ponies to help defend the residences."

Princess Celestia looked at my future self "Twilight were you in Ponyville when you came back in time?"

"Yes."

"Oh no! I'm afraid that the paradox you caused has attracted some very unwanted attention." She turned towards the guards, "Guards! Prepare Canterlot for an attack by air."

"Yes Princess we'll alert the Captain immediately to prepare his shield spell" the pegasus guard said beginning to depart.

"Tell l Captain Shining Armor to begin a search for a blue box with the words 'Police Public Call Box' across the top"

"Yes mam" He said taking off.

"Why do you need a box?" I asked the princess.

"That box is owned by the only pony that could help us.

"Is there anything we can do?" my future self asked.

"No, well not necessarily. I believe these beast are here for the two of you, they match the description of monsters I have faced before. As I know them they exist to fix the problems in time, such as the same pony existing in two places at once and even touching each other."

"So what do we do?" I asked.

"We have only on option, you must stay here in Canterlot behind your brother’s shield. I don't want to even chance that you'll be destroyed."

"But we need to help our friends, we can't just leave them to face those monsters alone." my future self pleaded.

"They are not their target, if you were to go they would only be put in more danger."

"But if you expect them to come here next then what's the point. We'll just be putting you in danger!" I said stomping my hoof.

"If these are the same creatures then I have little to worry about" The Princess said turning to look out the window at the smoke coming from Ponyville.

"What do you mean?"

"He told me not to say." She said giving a small smile, "It's funny the one time we really need him and he's not here."

"Who?"

"He calls himself the D..."

A guard rushed into the room, "Princess one of the guards deployed to Ponyville spotted the box you described."

"I must depart immediately!" Princess Celestia said her horn starting to glow. There was a flash brighter than the sun and Princess Celestia vanished.

"Wait!" me and my future self shouted.

"We have to get to Ponyville!" My future self told me.

"She just told us to stay here, and we shouldn't disobey her."

"Normally I'd agree but I caused this problem and I intend to fix it." She said.

"But what if she sends us back to magic kindergarten for disobeying her."

"True but we did earn more than a few favors for what we've done."

"I guess" I said.

"Well by next Tuesday it'll be more than a guess, now come on."

"Ok"

"Good" She said grabbing me with her telekinesis.

She began to run lifting me as she did, I landed on her back as she cast the teleport spell and we were back in the library. Immediately we crashed into Rainbow Dash, "Twilight! Where have you b..." She stared at us clearly confused.

"No time to explain! Where's the Princess?!"

"She's out there keeping the monsters from coming in and getting all of us." Rainbow Dash said motioning he hoof to all of the other ponies that were corralled into the library.

"Why are you all in here?"

"The princess says this is the safest place, duh!" Pinkie Pie answered coming out of nowhere.

"We need to get to her" My future self insisted rushing for the door with me. She pushed it open and we saw a deep red pegasus stallion with a leather jacket and short brown mane.

"Who are you?" I asked.

"No wonder they've been more energized lately you two been toughing", He said. He knocked me off of my future self and then stared at her closely, "You're changing!" Was all he said.

"Twilight Sparkle!" Came the booming voice of Princess Celestia, "I told you to stay in Canterlot!"

"Does anypony on this rock know how to stay put, I mean it's pretty simple, all you have to do is not move."

"Who are you" My future self glared.

"I'm the Doctor, one of Princess Celestia's worst kept secrets."

"What?" I asked.

"I told her not to speak of me to anypony who I wouldn't approve of and well she is really bad at figuring out who I'd approve of."

"You tell every other pony you meet your name! How am I supposed to figure it out when you clearly have no reservations of hiding yourself?"

"That's only because it's me telling them! No back to the matter at hoof we have two... Purple ponies in the same point in time and I don't have my T.A.R.D.I.S. So easy solution feed them to the lions for meddling with something they never should have even been allowed to see, not to mention there tearing holes in space as well with that bloody long distance teleport that they should have never had access to."

"Doctor is there no other way" Princess Celestia asked him.

"Oh yes! We kill them outright and the reapers take their bodies."

"That's not what I meant, I want to be able to keep her at the end of this Doctor."

"Well there's this he said pulling out a key, I can use it to call my ship and I can stop this time line and miss born of war over there." He said pointing at my future self.

"What do you mean?" My future self glared at him.

"Oh your time line being corrupted and as of right now you've been running from these things and probably seen us all die and maybe even yourself."

"What? But I...Ah" my future self fell to the ground writhing in pain.

"There are the memories coming to her now, see." He said.

I rushed over only for Princess Celestia to grab me with her magic, "You cannot help her." she told me.

"Oh that is fantastic!" The Doctor exclaimed.

"What!?" Princess Celsetia and I asked.

"My key is glowing!" He yelled.

"So?"

"That means I can do this!" He said miming as though he was putting it in a door and then suddenly a yellow aura appeared and formed the outline of a large, tall box.

"Isn't the T.A.R.D.I.S. on the other side of town?" Princess Celestia asked.

"No they stole her right from her shell and I'm bringing her back. It'll only take a moment, I hope. We just need to wait till she gets here. For now do another pass they're getting a little too close for comfort."

Princess Celestia nodded and took off flying close to those things. "So when this Tardis gets here what will you do?" I asked the Doctor.

"I'm not sure yet, but trust me when I say we'll be safe inside."

"That's reassuring" My future self said getting up.

"Welcome back to the land of the living." He said smiling.

A weird sort of wheezing-gasping noise started to come from the glowing box as the outline started to fill with the color blue. Several of the monsters began to get closer as the box filled in. "Oh no you don't this is far too old for you to even touch!" He shouted at the monsters and they backed up a little."

The box was completely filled in and he opened the doors, "Quick! Before they drag it away again" he motioned to my future self and I We ran into it and he closed the doors behind us and leaned up against it.

"Wow! It's bigger on the inside! How is this even possible?" I asked him.

"Yes, yes now I you're going to feel a little pain as I erase you future!"

"What?!"

Started to hit several buttons on the main consul. Then he shouted "NO!!! You've got a fixed point in your timeline, dang alicorns, you lot get me every time!" He moved over to another part of it, "I've got it a Destiny Paradox!"

"What's that?" my future self asked.

"It's a paradox that operates on a very simple principle, 'you can't change history if you're a part of it'. If I can generated on of these then all of the other paradoxes would be ignored."

"Why?" I asked.

"It would take ten years for me to teach you in a way you could even begin to comprehend how it works. So all you need to know is that it should fix everything." He told me hitting different buttons.

Suddenly, all at once my future self flashed and disappeared, I ran over to where she was. "What happened to her!?" I shouted.

"She returned to her own time, the spell she used finally brought her back. The Destiny Paradox will take effect of you the moment you step outside. I'll be putting you in right before you meet your future self and then the Destiny Paradox will take effect." He walked over to me and put his hooves on either side of my head, "There can't have you remembering the time travel spell and for good measure the tear holes in space spell." He said then he opened the doors and I saw my library, "Go on and don't worry I believe I've fixed everything just don't go messing with time again.

I stepped out and the box began to vanish I immediately began to work on my checklist when a wind blew papers everywhere and a flash of light revealed my future self...

Twilight took off the helmet and set it down, "Wow that was interesting!" She said.

"Yes very" Princess Celestia said turning towards the Doctor, "Mind explaining why I remembered those creatures then but don't now?"

"Well timy-wi..."

"I want a real explanation please."

"Well time is in a constant state of flux and I may have changed it a little. But that's beside the point we should get to the next story after all..."

"AAAAAAHHHHAHHAAHHHHAHAHAHHAH!!!!!!!!!" Twilight started to scream loudly.

The Doctor ran over to her and scanned her with his sonic screwdriver, he checked the results, "Don't worry she's just remembering her future selves version of the events." He announced. "So who's next?" he asked over her screaming.

They waited for here to settle down then Princess Celestia said "You."

"No, how about Cadence..."

"No. And I know the story you're going to tell us, right Luna?"

"Yes, we wish you to tell us what happened to the others."

"Well as you know Discord destroyed the seaponies..."

"Not those other... We want to know what happened to our parents..."

"Are you sure you don't want to go Luna?"

"No! You have kept it from us for over two thousand years now!"

"Fine! Fine! Longer ago than anypony can remember there was a war..."

Author's Note

I thought I wrote myself into a little hole with Twilight, considering she's the main character of the show and all. But then I remembered the episode of Doctor Who Father's Day, (Spoilers, I guess) where time was reset and figured why not.
I only remembered that Princess Celestia and the Doctor are in the same room as Twilight is telling the story, and it comes off as a little rude. So please forgive me for the oversight.