**

"Everything else seems fine." The Doctor smiled, having finished examining the young woman with the Sonic Screwdriver. "All healthy, just a bit," he paused for a moment, trying to find the right term, "grey, I suppose." He shrugged.

"But what did it?" The man beside her asked. "And how?"

"I don't know." The Doctor frowned, looking towards the doors. "Not yet." Then a sudden realisation hit him. Whilst he had been in here calming everyone down, whatever it was had probably kept on running, draining whatever it could. "Everyone stay here." He shouted with authority. "Whatever it is these things do, it looks like they need to touch." He adjusted the Screwdriver and waved it around the room quickly. "There's no more in here, so it's safe." He looked around the room. "So, stay here."

With that he dashed towards the double doors, where Terry and two other staff were still standing.

"Terry, keep them in." He requested kindly, to which the young man nodded in agreement. "Good man." He made to leave the room, before pausing once more, making a note of the screen number above the door. Screen Four. "Oh, and Terry?"

"Doctor?"

"If these doors open on their own, get out."

**

The carpet, which had been red earlier, the Doctor seemed to remember, was now a dull grey, the stains of various food and drink left now just darker patches. He looked to the left, where about a foot away, the carpet had retained its colour. For invisible creatures, the Doctor thought, they were proving easier to track than he had thought.

For now.

He sprinted down the corridor, occasionally glancing at the movie posters and large cardboard cut-outs surrounding him. The Doctor had gotten used to running down corridors, but none of them were usually this interesting to look at. No customers, the Doctor noted. He hoped that everyone was in a screen, hopefully one that wasn't being visited by an invisible visitor. Judging by the stretch of grey the lay ahead of him, the one that he was following, or it could have been two, he wasn't quite sure, had made their way to the lobby. Getting closer, he held the Sonic Screwdriver out in front of him once more, listening to the faint warble it produced. At least now, the Doctor thought, he knew why the TARDIS had decided to bring him here. It had been just another routine, for him anyway, random landing. He hadn't believed for one moment that the only reason he was here was to see a rather budget film about car racing. It had been a nice thought for a while, though.

The signal from the Screwdriver grew strong as he stepped in to the lobby, where sure enough, the invisible beings' presence was confirmed. On a quick first count, the Doctor spotted around half a dozen people who had been affected. He just had to hope they hadn't headed outside. Searching in here would be relatively easy, but out on the streets on London? Different story altogether. He breathed a sigh of relief as he saw who he assumed was the manager standing in front of the only exit, surrounded by people, many of whom the Doctor recognised from the screen earlier.

"You can't get outside." The man said loudly. "Something, or someone has locked us in."

"Then break the windows!" Came a roar from the crowd.

"We've tried!" The manager responded. "We can't get through."

"Sounds like some kind of stasis field." The Doctor said calmly strolling over to the crowd. He looked out of the windows to the dark night outside. Why would whatever it was want everyone kept inside?

His train of thought was quickly interrupted by a scream from across the large lobby. His head shot around to see another young girl sprawled on the grey carpet, the colour quickly fading from her skin, clothes and hair.

"Somebody go and help her!" The Doctor ordered, as he rushed in her direction, Screwdriver primed. He quickly looked back to the stationary crowd. "Well? No one? You won't catch it you know!" He sprang back in to action as two young men stepped forward to help the girl up.

"Now, where are you?" The Doctor shouted loudly so that his voice echoed throughout the room. "You can't hide from me!" He thought for a second. "Well, maybe you can! But you can't hide from my Screwdriver. It's sonic you know!" He whipped around, hearing footsteps. No, only the young girl from moments before. The tone from the Sonic Screwdriver changed slightly as he darted to the left, towards the small confectionary stand, separated from the main lobby by three walls and, the Doctor noted, a metal shutter, which was currently open. He rushed forwards, waving the sonic device in an arc in front of him. As he progressed forwards, the Doctor could see the carpet a few feet in front of him slowly being drained.
"Got you." The Doctor smiled cheekily, stopping in the middle of the area. He could tell, from the colour slowly being drained from the display of sweets at the back of the room, that the being was cornered. Now it was just a matter of being careful."

"So," he said seriously, "I'm the Doctor, and who exactly are you?" He paused. "Presuming you're there of course, and I'm not just making myself look like a huge idiot."

"We are the Unseen." The voice was cold, unemotional. The Doctor twitched a little.

"Nice name and all," he shrugged, "but what if you are seen? What then? The Seen? The used-to-be-Unseen?"

"We are the Unseen."

"Ok then, and the Unhumorous too." The Doctor replied. "So if that's all I'm getting identity wise, why don't you tell me why you're here? And why you want colour? Bit of an odd thing to steal, don't you think?"

"We do not need this concept you call colour." The voice responded.

"Could have fooled me." He looked around the room. "You've drained it from people, from carpet.." his glance drifted to the Pick N Mix stand behind where he assumed the Unseen was. "Oh no! And the Jelly Babies? You had to take the colour from the Jelly Babies? Now how people going to tell which ones to leave at the bottom of the bag?"

"This is of no concern to us."

"Evidently." Suddenly, the tone of the Screwdriver changed. "That's cheating! The Doctor shouted, as he felt something pull at his coat from behind. "Sneaking up on someone whilst you're invisible!" He span quickly, managing to shrug his coat off and spin on the spot in one fluid movement. If he was correct, both of the Unseen were in front of him now. The Doctor held his once brown coat up in front of him, its' grey a contrast to even his rather pale skin. "Not the coat as well!"" He groaned, stepping back a few paces, subtly looking up to the ceiling of the small sweet section. "Now you've really made me angry.

Stepping back a few more paces, the Doctor quickly adjusted the Sonic Screwdriver, and pointed it at the shutter above.

"I'm guessing you need all this colour-"

"We do not need colour."

"Well whatever it is you need, I'm guessing you need it for something. So let's see what happens when you don't get it, shall we?" The Screwdriver buzzed in to life, quickly sending the shutter crashing down, separating the Doctor from the pair of Unseen. He smiled proudly, looking around at the other people in the room, who seemed less than impressed. Looking at the walls, the Doctor could see the posters turning to a dull monochrome, walls losing their shine.

"Well, if that's taught me anything?" The Doctor sighed to himself, "Never assume they only hunt in pairs. Everybody," he shouted, his tone becoming very serious, "follow me! Run!"

He darted towards the corridor that he had come down earlier, knowing that he needed to buy some time to think. Looking back, he saw that everyone had followed his command, for once. They were even all making sure the people who had been affected by the Unseen were alright and keeping up.

"Where are we going?" One of the crowd, a member of staff, shouted loudly to the Doctor.

"Screen number four!" He replied, looking over his shoulder. "Down here on the left!"