Disclaimer: Anything you recognize, I don't own. Anything you don't recognize, I own. Probably.

Xander the Time Lord?

by Melissa45

Xander searched the bargain bin but it seemed like they were sold out of toy guns. There went his great idea for cheap soldier costume. He was about to turn away when he spotted it. With a small key, and maybe his father's trench coat, it was the perfect accessory for the best Halloween costume ever.
Ethan Rayne couldn't hide his puzzlement when the Slayer's friend came up to the cash register with just a small plastic sledgehammer. "What are you going to be able to use that for?"
"Not what. Who." Xander smirked.

Buffy opened the door for Xander, and when he saw her ballgown he bowed and then stood up and shook her hand while grinning broadly. "Greetings, milday. I am the Doctor. Wonderful to finally meet you for the first time. I apologize for the slight delay, ran into a spot of trouble on Yavin 4..."
Xander swept past her as Buffy tried to process the fact that her friend was speaking with a bad British accent and babbling worse than Willow. "Doctor who?" she wondered outloud. Her question remained unanswered as Xander happily greeted a ghost costumed Willow.

The Doctor suddenly found himself on Earth, in 20th century America. Chaos surrounded him, but that wasn't unusual. What *was* unusual was the fact he did not remember what he was doing there. He pulled out his sonic screwdriver and did a scan. "Now that's interesting." The strange beings terrorizing the humans all gave off a similar frequency that seemed to be emanating from a central location. The Time Lord started off in that direction, but when he fine tuned the screwdriver he discovered that the *power* for the broadcast signal was coming from another location.
A dimensional rift! And the barrier was very thin. The Doctor dashed around the block, coat flapping, to where the Tardis was waiting for him.

Giles was sorting the card catalog when there was a strange pulsating noise and light, which stopped after a blue police box appeared. In the middle of the library. When Xander Harris of all people stepped out of it the British librarian pulled off his glasses and started polishing them furiously.
"Xander, what are you.." he began, but was interrupted.
"I am the Doctor, I don't know anyone named Xander. There's nothing to worry about. I'm just going to use this sonic pulse phase disruptor (here he waved the shiny bulbous gun around) to close this dimensional rift and stop the person who changed a lot of you humans into their Halloween costumes! Now stand back"
One light show, two explosions, and several British swear words later, Xander sat up with a groan. "Ow, my brain hurts. Whoa! What happened to the library, G-man"
Slowly standing up from hiding behind his desk, Giles sighed, "Don't call me G-man. You had been turned into your costume. What on Earth made you decide to dress up as the British television character Doctor Who, Xander?"
"Um, the time travel? And the cool gadgets"
"Yes, well, if the Doctor was correct, he just used one of those 'cool gadgets' to close the Hellmouth. Permanently. I suppose that more than compensates for the ruin he made of my books"
"Oops?"