A/N: This is my first FanFic, so hope you like it. Also, thanks to Emily (555emms) for proof-reading and editing the story.

The soft orange glow of the TARDIS lit a scene of confusion and joy: the Doctor, a smile plastered on his face, was dancing around the console, flicking switches and turning dials as if at random and checking the small monitor for changes in the array of circles and lines it displayed; Amy and Rory, meanwhile, were hanging on to a railing to avoid being flung across the room – and enjoying every second.

The slow rasp of the brakes alerted the excited travellers to their arrival and Amy jumped up and headed for the door – dragging Rory along with her.

"You two - Wait!" warned the Doctor, holding his hand up. "We've been pulled slightly off-course."
Amy turned to him and sighed, "Can't we ever just go somewhere nice?"
The Doctor scoffed. "We do! I took you to that beach planet didn't I? And there was that great circus on the second moon of Strantus…"
"Yes, Doctor," Rory answered with a hint of sarcasm in his voice, "The lovely beach with the 4-foot killer crabs, that was a bundle of joy. Oh, and I loved the circus, right until the part where we got kidnapped."
Amy smiled at her husband and headed towards the Doctor, "So where are we then? Anywhere fun?"
"A distress call came through" replied the Time Lord distractedly, as he swung the monitor and checked their destination.
"Um…Doctor?" called Rory from the doors, but he was – as usual – ignored.
In an instant, the Doctor's face had flipped from interested to alarmed, even scared. Something was seriously wrong. He could laugh in the face of vampires, fight off the Daleks with a Jammie Dodger – so what could be this bad?

"What is it, Doctor?" inquired Amy, worried.
"Midnight." answered the Doctor, soberly, "We are on Midnight: a planet basked in Extonic sunlight. Any living thing would perish...instantly." he paused, taking in the expressions of his companions. Rory, especially, looked slightly peaky. "There is something else here... lurking between the diamond cliffs and waterfalls. A creature that could destroy a whole civilization... A being of pure thought. It infects your mind and steals your voice." The Doctor dropped to a quite whisper, "I saw it take two people's lives. It nearly had me finished off once before, I won't let it happen again. We're leaving."

The low hum of the TARDIS was the only sound, as the travellers took in the solemn tale they had been told and the Doctor turned to pull a lever.
"Doctor!" shouted Rory, more urgently this time.
The Doctor looked up slowly, and then nodded.
"Ah, yes, you wanted something," he remembered, jumping down the steps, towards the concerned man.
Rory motioned towards the doors separating them from the deadly planet; his eyes glittered with worry and hesitation.
"Someone's knocking".

A/N: Hope you liked it. Please comment, constructive criticism welcome. Thanks for reading Chapter 1 of Someone's Knocking.

"Shamble-bobble-dibble-dooble." 10th Doctor and Sky Silvestry, Midnight