Gravity Falls + Doctor Who (Crossover)

Chapter 3

Dipper flipped through the pages of his great uncle Fords journal.
"There's nothing in here about it!" Dipper cried hopelessly.
"We'll find out what this is eventually, right?" Mabel asked.
Suddenly, as if on cue, the door of the box opened up.
Wait, THERES A DOOR! Dipper thought to himself, rummaging through the questions he had. He was shortly interrupted by clouds of smoke that flew out of the box, and followed by a shadow-y figure appearing in the smoke. He was a slender figure, one you would see often in Gravity falls. Emerging through the smoke, he immediately took notice of the twins.
Dipper and Mabel could see him better now. A trimmed button down jacket with a red-striped shirt underneath. He was also wearing bow tie and a Fez, much like the one their Grunkle Stan uses.
"Hi, one question. WHO THE HECK ARE YOU!" Mabel asked impolitely.
"Mabel!" Dipper scolded.
"No, no, it's quite alright." The man said in a British accent.
"I'm the Doctor, the one who sent you the letter."

The next Chapter will probably be the last one, so stay tuned!