"I'll have to thank The Master for giving me a slow death." The Doctor said to himself. He reach into his collar and pulled out a TARDIS key. He closed his eyes. He thought about the TARDIS dematerializing around him. He opened his eyes and he was inside the TARDIS. "Wow, that actually worked." The Doctor said to himself. He grabbed a lever and pulled it.
The TARDIS materialized outside the gas-filled room. The Doctor walked out, and thought to himself, I have to find Princess Cadence. If I don't, her husband will kill me, and I'm running out of regenerations.
The Doctor walked through the hallways knocking on each door he found. In one hall, on the first door to the left he heard a faint voice say, "help." It was a girls voice.
"Hello is anyone in there?!" The Doctor shouted.
"Huh?" The voice said. "Who's there?"
"I'm The Doctor, I'm here to help." The Doctor replied. He pulled out his sonic screwdriver and unlocked the door. He ran into the room. Lying in a bench was a light pink alicorn with a long purple mane, with pink and white streaks. Her cutie mark was a crystal heart. "You must be Princess Cadence." The Doctor said.
"What gave it away?" Cadence asked.
"Everything." The Doctor replied. "Your highness, what happened to you after you were taken captive?"
"I almost drowned in white water." Cadence explained. "Then I was put in here. I've been attacking the door with spells, but nothing seems to have any affect. Not even my obliteration spell."
"There must be a magical damper on the door." The Doctor said, "The Master has gotten clever, really clever."
"Just one other thing." Cadence said.
"What's that?" The Doctor asked.
"Can we leave?" Cadence asked in return. "After all, I'd like to stop this guy, and see my husband."
"Yes, we can leave." The Doctor said. Suddenly, an earthquake began to shake the underground complex. Dust fell from the ceiling, and the bed in the cell toppled over. "Basically, run."
Cadence and The Doctor ran through the complex, until they reached a fork in the road. Cadence went one way, The Doctor went the other. "Where are you going!?" Cadence shouted, over the rumbling noise. "The exit is this way!"
"I have a quicker way!" The Doctor yelled back and continued to run. Cadence sighed and ran after him.
They reached the TARDIS, when Cadence stopped in her tracks. "That's your big escape?" She asked. "A wooden box?"
"Oh, why does this always happen?" The Doctor said to himself. He unlocked the door, and shoved Cadence in the box. The Doctor followed and raced to the TARDIS controls.
Cadence was at a loss for words. She had been captured by a changeling, saved an empire from a 2000 year old ghost, but this box was the most remarkable thing she had ever seen. "It's..."
"Yes, it's bigger on the inside, why is everyone always surprised?" The Doctor groaned. He pulled a lever and the TARDIS core began to go up and down.
Suddenly the core stopped moving, and sparks flew from it. The controls shattered and exploded, followed by a severe rattling. The TARDIS began to shake rapidly, and the typical screeching noise was sputtering, like a car that would start. "What's going on?!" Cadence shouted, being flung to the wall.
The Doctor hung on to the control panel, looking at the remains of the computer screen. "Time block!" He shouted back. "The Master must have become more clever than even me!"
Cadence, flying up to The Doctor, yelled, "What does that mean?!"
"It means we're going to the past!" The Doctor shouted. "The very distant past!"