"So what seems to be the problem?" The Doctor asked as he spun into the Undergallery.
"Miss Stewart has gone missing." Osgood said, stepping forward from where she had been standing. "We've looked everywhere but there's no sign of her."
The War Doctor looked at the white sheets, which now lay crumpled on the ground amidst the stone dust. "The statues have moved."
"No." The Doctor said, squatting to inspect the ground. "Something else did. Look at these footprints!"
"Ah, yes." Osgood looked down at the prints, which resembled a human, but were much larger and more crooked looking. "We've already looked over them, and we can't seem to figure out what they're from."
He looked up at her. "Did you ever get those reports I asked for?"
"Yes I did." She handed him the papers.
"Good girl." He stood up, looking them over.
"What do they say?" The Master asked, looking over his shoulder.
"Who's this?" Osgood asked. "Is this another one of your incarnations?"
He scowled at her. "Don't you—"
"This is the Master." The Doctor interrupted. "A fellow Time Lord and a friend of mine."
"I'm not your friend."
"Statues!" He cried. "I knew it!"
"Well what does that mean for us?" Ten asked, confused at his future self's actions.
He grinned at his younger version. "Ah, I knew it! I knew it had to be something! The creatures smashed the statues that were under the sheets and pretended to be statues themselves!"
"…and so they took Kate?"
"Yeah." He looked around. "And possibly others."
"Well I'll be!" The War Doctor exclaimed as he inspected the footprints. "It looks like a Zygon to me!"
Ten knelt down, taking out his screwdriver and scanning the imprints. "Could very well be. It's hard to tell, though."
The Doctor looked at Osgood. "Where do these lead?"
"That's what I was about to suggest." She said. "I'll have McGillop escort you to our further findings." The scientist stepped forward.
The Doctor turned to the Master, murmuring in his ear. "You stay here. I can't be convinced that one of these scientists isn't a Zygon themselves. Just to be safe."
The Master nodded silently, crossing his arms, narrowing his eyes as the Doctors were led away.
"So what are we looking at?" Ten asked.
They stood facing a dead end halllway. There appeared to be nothing unusual about it. Blank white walls with paintings hung upon it, and nothing else. The only thing out of the ordinary was the dwindling trail of grey dust ending at the far side of the corridor.
"This is where the trail of dust supposedly left by the Zygons ends." McGillop explained, his voice echoing around the eerily quiet hallways.
The Doctor stepped forward, looking around. "This is the only place the Zygon went?"
"As far as we know."
"Well why would they come here?" The War Doctor asked, spinning in a slow circle. "It's just a dead end."
Ten went around the room, pressing his ear to the walls and knocking on them. "Nope. No other way out. It's a dead end alright."
The Doctor knelt down at the end of the hallway, inspecting the hardwood floor curiously. "Hello…"
McGillop peered at him curiously. "What is it?"
"It's a set of footprints." He said as he inspected the faint prints in the dust.
"So? It's probably the Zygon."
"No, no, no. This is different. They're human footprints! Somebody was standing here…" He stood up, planting his feet in the dust where the prints were. "They were standing here, and somebody was backed up against the wall. Trapped! They were trapped!"
"Who was it?" The War Doctor asked.
"Not sure. Could be Kate, chased by a Zygon." He knelt again, taking a bit of the crushed stone and licking it. "Leather shoes."
The War Doctor stared at his future self in confusion, stepping closer. "Why do you lick things? What's the point? I wonder where you two picked up all these strange quirks."
"Hey. In my defense, he's weirder than I am." Ten defended himself as he joined his other selves.
"That's a matter of opinion, I think."
The Doctor grinned crookedly. "It's like smelling things, but better."
"Did something happen to your nose, then?"
He waved his hands dismissively. "It doesn't matter! Anyway, we know that someone was trapped here, and out there somewhere is a Zygon duplicate of somebody, though I'm not sure who it could be…"
"I have an idea of who may have been trapped." McGillop' s voice echoed behind them.
"Really?" The Doctor turned, smiling. "Who…" The words died on his lips.
McGillop was standing in the same place he had been a few minutes ago, but he looked very different. His eyes were yellow, gleaming fiercely in the bright light of the gallery hallway. His arms were showing suction cups that appeared to be poking through his skin with a pinkish color. He was smiling, and his teeth were vicious, yellowed, sharp fangs that were bared in his ferocious grin. He took a step forward, and the Doctors took a step back, their backs pressed against the wall.
"You're trapped." He hissed, his voice beginning to revert into the gurgling whisper of the Zyons. "Now, it's time to meet your end, Doctor."
"What word have you on your exploits with the Doctor?" Osgood's duplicate asked the Master.
The two stood alone in the painting room, having sent the other scientists away, taking the opportunity to let their true selves show through.
The Master's duplicate grinned at her. "Perfectly fine. These thick people have no idea what's going on. And the Time Lords… They're even dumber! Three Time Lords in one room and none of them suspect a thing. Not even the Doctor."
She smiled evilly. "He can be incredibly stupid. And to think, we're about to kill three of them! Even better."
"We might have to make some copies then. I'm quite enjoying this whole setup with that little human girl that the Doctor has befriended."
"How is that going?"
He looked down at his hand, twisting the golden band on his finger. "She doesn't suspect a thing. It's a shame I'll have to kill her eventually. She is a little bit put off by my 'strange' behavior, but she dismisses it. We agreed to have the wedding in a week… I guess now five days."
"That's awfully quick."
He looked at his fellow Zygon with a treacherous glint in his eyes. "All the better."
She looked past him at the TARDIS, which was sitting outside the small entrance to the Undergallery. "What about his blue box? If we took that, we could-"
"Forget it." He growled. "He locked it, and the key is still in the real Master's clothes. I forgot about it."
At that moment, there was a chorus of shouting that echoed loudly throughout the room, coming from the direction that the trail of dust took.
The Master scowled. "What the-"
The three Doctors ran into the room, seemingly tripping and stumbling over themselves, sending up clouds of grey dust as they bumbled. The two looked on in shock.
"What's going on?" The Master asked.
The Doctor coughed, flailing at the dust in an attempt to clear his vision of the thick obscuring agent, tripping again and sending up more as Ten bumped into him in his seemingly panicked state.
"Now would be a good time to run!"