Merlin wasn't a stranger to running for his life, and it seemed as if the Doctor wasn't either. However, the latter was a stranger to running for his life through the halls beneath the castle of Camelot, and Merlin had to correct a few wrong turns.

When they reached a door to the outside, Merlin was dissapointed to find it locked. He turned to the Doctor. "I don't have the key."

"'S alright," the Doctor wasn't worried. He reached into the inner pocket of his jacket and, to Merlin's amazement, pulled out the thing he called a sonic screwdriver.

Merlin's jaw dropped. "But I felt the pockets earlier! They were empty!"

"No they weren't," the Doctor assessed cheerfully, placing the now blue-glowing tip of the sonic screwdriver to the lock. "They're bigger on the inside. Helpful when you need to hide things." After a few seconds, the lock gave a soft click and the Doctor pushed the door open gently.

"Bigger on the inside," Merlin muttered. "That's a new one." He then spoke directly to the Doctor. "But how would that be accomplished without magic? It's impossible."

The Doctor shushed him, poking his head out the door. "The guards have moved on. Let's go."

Merlin mentally berated himself to keep his priorities straight. He had to get the Doctor out of Camelot. He followed the Doctor out of the castle tunnel as quietly as he could, and they made their way through the dark streets and into the night.

"They'll be on guard now, you must be careful when you leave," Morgana advised.

"I have my ways," her sister said. "But be on the lookout for the Doctor."

"If he can be made an ally," Morgana suggested, "would he not be useful?"

Morgause snorted. "This is not the sort of plan he would approve of. Most 'good wizards' in children's tales turn out to be him."

"He has quite a reputation," Morgana noted.

"And he's meddlesome," Morgause continued. "If he finds out about us, we're ruined."

Morgana frowned. "Then we have a problem. He's already met Merlin."

"How are you... Not... Out of breath?" Merlin panted, struggling to keep up with the Doctor as they ran through the forest.

"Two hearts."

"What?"

The Doctor let out a frustrated huff. "I'll explain later. Now where is... Ah!" He cried out for joy when he saw the tall wooden box in the distance. "There she is!"

"She?" Merlin wondered aloud. How could a box be a she?

The Doctor rolled his eyes, but didn't answer. He ran straight for the TARDIS, whipping a key out if his inner pocket and trusting it into the lock. "Come on."

"What do you mean, 'Come on'?" Merlin cried exasperatedly. "I have to make it back to Camelot before they notice I'm gone!"

"The TARDIS is the fastest ship in the universe," the Doctor said, stepping inside.

Merlin's jaw dropped. "That is not a ship, that's a box! How can you think— Doctor?" the Doctor wasn't even listening. Merlin walked up and pushed open the doors, expecting to find the mad sorcerer sulking in the corner of the box or something.

He gaped for a full ten seconds, then had to run around the box once to make sure it was still the same size as before. Then he poked his head inside again, still speechless.

It was bigger on the inside.

He cautiously stepped into the box, eyes wide with wonder. The room was like a cathedral, with twisted pillars and a green-glowing tube at the centre of a round table covered in buttons and dials and switches.

The Doctor glanced up from one of the dials briefly. "Close the door, will you?"

Merlin obliged, still silent.

"Well, what do you think?" The Doctor asked the boy from Camelot.

"There's no way you're telling me this isn't magic."

The Doctor smacked his head against the console. "Time Lord science. Why is that so hard?"

Merlin wasn't sure which question to ask first; what a Time Lord was, or how this amazing box could be explained by science. He settled on the former.

"Time Lord. That's what I am," was the Doctor's response. "Hang on a mo, and I'll explain it." He ran around the console, pressing a button here, adjusting a toggle there. "And by 'hang on' I mean literally, hang on to something."

Confused, Merlin grabbed hold if the railing that led from the door. Just in time too, because the whole world began to shake under his feet. "What's happening?"

"Merlin, welcome aboard."

Merlin was flabbergasted to find that when he opened the doors again, he was looking at a completely different part of the forest. "We've moved!"

"Yup," the Doctor pushed him out of the way to exit.

"But," Merlin stumbled over his words. "But how is this not magic? Science can barely do anything! Where are we?"

"Several miles away, about fifteen minutes ago," the Doctor answered, facing the human with his feet firmly planted and his arms crossed.

"Fifteen minutes ago? That's not possible, I don think even magic..." Merlin shook his head, walking out of the TARDIS. "Who even are you?"

"Merlin, look up," the Doctor said. "What do you see?"

"The sky."

"Yeah, of course you do, what's in the sky?"

"Stars," Merlin said.

"Humans haven't figured this out yet, but all those stars are actually suns, billions and billions of miles away, and each of those suns have planets, and on those planets there are, sometimes, people. All different kinds of people," The Doctor said.

"That's ridiculous," Merlin responded. Stars were so tiny, how could they be as big as the sun? How could there be people living in the sky?

"In a couple hundred years, so will magic," the Doctor retorted.

"Why are you telling me all this?" Merlin looked to the man standing beside him.

"That's where I'm from," the Doctor said, still looking at the sky. "A planet and a star so far away you can't even see it from here."

"And you came here in that?" Merlin gestured to the blue wooden box.

"Yup," the Doctor nodded, still not looking at him. "You believe me?"

Merlin opened his mouth to say no, you're bonkers, but then hesitated. If this box had been using magic, it would have had to have been powerful magic, and he should have sensed... something. So was the Doctor's story completely unbelievable? Well, Merlin had seen quite a few unbelievable things in his time.

So he settled on, "I don't know."

"I'll take that," the Doctor gave him a smile. "Now, do you know where we are?"

Finally paying attention to his surroundings, Merlin easily identified the location. The two high statues gave it away, really. "Valley of the Fallen Kings."

"Sounds exciting," the Doctor briskly strode forward.

"What— you can't jut walk in!" Merlin said.

"Why, is it magical?"

"Yes—"

Merlin stopped protesting when the Doctor pulled out his sonic screwdriver and it made that whirring noise again.

The Doctor frowned. "That's not right."

"Let me guess, that son-whatever isn't magic either," Merlin noted.

The Doctor smiled again. "Now you're getting it. Come on," he began walking forward again.

"Where are you going?" Merlin asked.

"Investigating," was the Doctor's only reply.

Merlin hesitated for a moment, then, deciding that he couldn't leave to poor fool on his own, rushed to catch up.

A/N: Apologies for any time period mistakes in this chapter. Thanks for your time. Please let me know what you think/correct mistakes/make fun of Merlin and Morgause's stupidity apparently via review!