"Television cameras!!!! Television cameras! What next...Hello magazine spread?" Jack was shouting, though the Doctor had warned them to stay quiet. There was no knowing what that machine could pick up on, even when switched off. But he didn't really care.

"That's it." He took a deep breath. "I give up. I officially give up on this planet. It's beyond hope."

"To be fair," The Doctor was watching the monitors where Moira was in the vaults, staring thoughtfully at the Feyad. "They're not exactly from this planet, are they? I mean, obviously they were once upon a time but not now. They have equipment that's...it's beyond forbidden. It just shouldn't be here."

"We have forbidden equipment," Jack said, slightly insulted at the insinuation that his Torchwood's equipment was less forbidden than theirs.

The Doctor gave him a long look.

"Ianto's not convinced," he said quietly.

"What?"

"I've been watching him. He knows there's something wrong."

"Ianto's not easily taken in," Jack said proudly.

"We'll have to watch out for him. If he becomes obviously suspicious, that puts him in danger."

"Always happy to keep an eye on Ianto."

"Yeah." The Doctor coughed slightly. "Where's Jenny?"

"Spying on the enemy like a good little soldier."

"She's not a soldier, Jack."

"Figure of speech." Jack looked seriously at the Doctor. "Were you bringing her here to have her checked out?"

"What?"

"Her genetics. We could check her genetic code...see exactly how related to Timelord genes they are."

"No." The Doctor looked around and lowered his tone. "I did wonder, Jack, especially when that gunshot didn't kill her." He sounded like he was admitting to a crime. "I didn't want to suggest that we check. What the Time Agency did to her...I didn't want to seem to be doing the same. And now, I don't really care what she is. She is who she is...to me."

"That's good," Jack said quietly. He looked away from the Doctor and back to the screens.

"Jack?"

"Hmmm?"

"You didn't kill the Time Agents. They killed themselves."

"I know," Jack said quickly. Too quickly. He was usually such a good liar.

"What do you know about that machine?" he asked.

The Doctor hesitated, as if aware that the question was nothing more than a distraction technique. Jack stared him down.

"It's called an atmosphere perception detector. Does what it says on the tin basically. Anyone out of place, not from the world it's used in, carries a different air around them. Sort of like vortex stuff, when you've been travelling in space." For a second, his face grew thoughtful.

"And it tracks that? The atmosphere from the person?"

"Yeah, sort of. When it's switched off, it sends huge volumes of the atmosphere of the world around it into that world. More than it's used to. That causes changes in the weather, by the way...makes the air thicker. And darker. And makes anyone alien invisible. They can breathe but that's about it. Then, it gets switched on. The effects are reversed and the alien can be seen. But they touch something around them, sit on something, use equipment, talk, whatever and their atmosphere gets highlighted a hundredfold and they can be tracked down. She's hooked it up to your technology so everyone they collect can be identifed."

"So we'll be visible when she turns it on? And the others? Will they remember us?"

"Probably not," the Doctor said, "depends on how strong an influence she has on their memories. I'd love to know where she's been...or they've been, I should say, to learn all this."

Jack watched as the Doctor's face clouded over suddenly.

"Donna," he said quietly.

"What?"

"Donna...her genetics. Remember? She could be perceived as alien!" He clapped a hand to his forehead.

"I forgot that. If she's been invisible all this time, she'll...she'll think she's died or something. She'll be terrified! Come on!" He turned towards the TARDIS, still blinking away in the centre of the room.

"I can't," Jack said. The Doctor turned around to face him.

"I can't leave," he repeated, "it's like..." He indicated Ianto. "It's like they're hostages or something. Ok, I can't do much for them but I can't leave them either. You go to Donna. I'll wait here."

The Doctor looked at him until the silence started to become uncomfortable.

"I can't leave you, Jack," he said finally.

"What?"

"Looked in a mirror lately?" He spoke lightly but there was undercurrent to the words. Anger? Regret? Jack said nothing.

"No? That's not like you. Well, find one. Look into it and then you'll know exactly why I'm not letting you out of my sight."

"Getting a bit over-dramatic, aren't we?"

"Call it what you like." The Doctor shrugged and turned back toward the TARDIS. For a second, a split second that he would never admit to, Jack felt a sudden shot of fury run through him.

"I'll wait for you," he said stubbornly.

"Jack, I'll tie you up and drag you kicking and screaming if I..."

"Oh you'd like that, wouldn't you?"

"What in the name of..." They both spun around as a voice spoke behind them. Moira was standing as if she'd been halted in her tracks, staring at them in shock.

"Keira!" she called sharply.

As if in slow motion, Keira and John moved toward them, Jenny between them, looking defiant. All three of them had guns. Big guns. Then Martha was standing too, looking at him as if she'd never set eyes on him before. Now that hurt. He couldn't bear to look toward Ianto.

"Ah! You turned it on! Visible at last!" The Doctor stepped forward, extending a hand politely.

"Don't come any closer or we'll shoot!"

"I'm the Doctor," he continued as if she hadn't spoken. "This is Captain Jack Harkness, the man whose job you appear to have stolen."

"To be fair, you could have just sent in a CV," Jack added.

"I knew it!" Moira said. She turned to the others.

"I said it, didn't I? I knew there were aliens here, in this building! I could sense it."

"Well, it is Torchwood. It's kind of the point," Jack said.

"You've been here all along, as if..." She trailed off.

"Tying each other up by the sounds of it," Ianto said.

Jack looked at him quickly. Ianto's face was blank, his voice as dry as always.

"Take them to the vaults," Moira said.

As John and Keira moved toward them, the Doctor held up a hand.

"Hold on! Moira...can I call you Moira? Didn't catch your surname! Seems to me that Jack runs this ship and it's really..."

"He's alien! As it is, that makes him, and you, our prisoners."

"If it's alien, it's ours," the Doctor said in a whisper. Jack glanced at him. He looked as if he was fighting some sort of inward battle.

"Don't worry," Moira said smoothly, "you won't be on your own down there. There'll be plenty of company before long." She turned toward the machine and pressed her hand on the lever.

"Careful," Keira said quietly, "we don't know how much power is too much."

"It's not important," Moira replied crisply, "a few less prisoners is a few less prisoners."

The air was changing. Jack inhaled sharply, feeling as if the walls themselves were closing in on them. Moira, Keira and John turned around as something became very visible to their left.

The TARDIS.

"You can break through perception filters," the Doctor remarked casually, "seems you've thought of everything. This is the TARDIS."

But none of them replied. Moira was staring at a screen in front of her. She looked up at the TARDIS as if it was a monster.

"Never seen a police box before?" he asked.

"Scan it," she said sharply.

"You won't break in," the Doctor said, "she won't give you a reading."

Moira turned back to him and Jack noticed that her face looked almost pinched.

"I know," she said.

"What?"

"You're a Timelord."

"What? Where have you heard that name?"

But she didn't seem to be listening. She turned back to the others, raising her arms in a gesture that suggested complete hopelessness, as if something was completely beyond her.

"It's alright," John muttered to her. "Moira! Get a grip!" They looked accusingly at the Doctor who looked almost as shocked as they did.

"Ok, ok!" Jack stepped forward and used what he hoped was his most commanding voice. "Let's all calm down. Seems we all have information to share with each other. Let's drop the weapons and act civilised for at least ten minutes, ok? Plenty of time for taking prisoners...or not, as the case may be."

Keira lowered her gun uncertainly.

Weird. He was the one giving the no-weapons lecture. But the Doctor seemed to have lost the power of speech.

"Doctor!"

"Doctor!" Now Moira stepped up to them. "You call yourselves Doctors! You're nothing but murderers!"

The Doctor met her furious gaze.

"I need to know where you've heard of Timelords," he said quietly.

"Heard about!" She looked unhinged. For seconds, they stared at each other.

"They're not Timelords, only me," the Doctor said finally, gesturing to Jack and Jenny, "you can scan us. You'll see."

"And he's not a murderer." Jenny's voice was strangely flat. "That's the last thing he is. Listen to Jack. Drop your weapons and we'll talk. No one will get hurt." Was she trying not to add to the emotion in the room? Jack decided to follow her example.

"Where have you been to know about Timelords?" He spoke slowly and clearly, as if Moira was hard of hearing, hoping to engage her.

John put his gun on the ground, reached over and gently took Moira's.

She looked around and blinked, as if coming back from somewhere terrible. That look made Jack feel almost sympathetic towards her.

"We've been..." She seemed to struggle to speak. "We've seen them in action."

"You can't have," Jack told her, still attempting to keep his voice as calm as possible. "You've got the wrong..."

She cut him off with a strangled cry.

"We've seen what you've done. We've seen your war! It killed our friends!"

"Where?" the Doctor asked again, sounding slightly choked.

"The Glimstone Mountains," she whispered. Keira put a hand on her shoulder.

The Doctor turned away slightly, looking sick.

"Doctor," Jack reached for his arm. "It's not possible. She's confused."

"Listen," the Doctor said urgently, holding a hand towards her, "Moira, listen..."

"No!" Suddenly, the shadows seemed to rush toward them until he realised that it was Jenny, arms outstretched. In a second that seemed like minutes, he looked down and understood.

The pistol in Moira's hand. Aimed at the Doctor's heart.

"Stop!"

"Jack!"

From far off, he was aware of moving, of losing balance, of grasping empty air.

Why did it always take so long to hit the ground?

A single scream and the Doctor's hands on his shoulders.

And nothing more.