The angel, the doctor, and the blue box

Twilight Sparkle, Princess Celestia's personal student, was on her way home from Sugarcube Corner with a box of cupcakes. She noticed a statue, whose hooves were covering it's eyes. "Creepy statue." She remarked, and continued to trot home. She then noticed a bunch of missing posters plastered on the walls, but she didn't pay any attention to them. When she got home, she found Spike sweeping up the library.

"Hi, Twilight!" Said the baby dragon.

"Hello, Spike." Said Twilight, setting down the box down on the table.

"Mmm...those cupcakes smell delicious!" Said Spike, setting down his broom.

"You can have some, if you'd like," Said Twilight. "But I'll be upstairs reading." She picked up a book titled "Aliens: do they exist?" that was written by a Dr. Smith, and went upstairs.

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"Ditzy! Hold on to something!" The Doctor yelled as he flipped a switch on the TARDIS.

"Okey-dokey, Doctor!" Derpy replied cheerfully. The TARDIS rocked back and forth and made it's signature sound. Then, a loud THUD! was heard, signaling that they had landed.

"We should be home now, Ditzy!" The Doctor said cheerfully. He opened the doors and trotted outside.

"Come along, then!" He said to Derpy. As they walked out, a statue of a crying pegasus uncovered it's blank eyes and smiled. The Doctor was here.

The Doctor and Derpy went around Ponyville, and eventually stopped at Sugarcube corner to get some muffins. There were two "guardian" angel statues on either side of the door, covering their eyes with their hooves. When they went in, the Doctor asked Mrs. Cake when they had put those statues outside.

"What statues?" She replied, confused. The Doctor rushed outside, only to find the two statues gone.

"Strange," he said, then walked back inside. Derpy happily munched on her muffins, while the Doctor was uneasy. He knew he had seen something earlier, when they left the TARDIS, but what was it? Then he thought about the two statues outside. No...they couldn't be here he thought. These thoughts were running throughout the Doctor's head while he chewed on his muffin. Suddenly, the door burst open, and a lavender unicorn trotted in. She ordered a dozen cupcakes, and took the box to wherever she lived. The Doctor realized that she looked familiar, then remembered that it was Twilight Sparkle, one of his past companions!

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Twilight lay on her bed, reading the book she had brought upstairs. She turned a page, and began to read another "possible alien" file. She started to read out loud.

"Weeping angels," she said. "The weeping angel can turn to stone whenever you look away from them, and are really fast. Faster than a teleportation spell, even for the most talented unicorns," she paused and said, "I could probably be faster than them." She continued reading. "The angels are faster than your teleportation spell too, Twilight." She blinked. How does this book have my name in it? She wondered. Maybe they mean somepony else. She continued to read again. "I do mean you, Miss Sparkle, and I'm pretty sure you know who I am." No way, she thought. Could it be? Could it be th- Her thoughts were interrupted by a knock at the door. She went downstairs to see that the door was ajar, and her number one assistant was gone. She went to the door and opened the door. And then she screamed.