The Doctor and {Y/N} read Martha's clipboard.
"There's carbon monoxide, hydrocarbons, nitrogen oxides, but ten percent unidentified. Some sort of artificial heavy element we can't trace. You ever seen anything like it?" Martha asks.
"It must be something the Sontarans invented. This isn't just poison. They need this gas for something else. What could that be?" {Y/N} asks.
"Launch grid online and active."
"Positions, ladies and gentlemen, Defcon One initiatives in progress."
"What? I told you not to launch" the Doctor says.
"The gas is at sixty percent density. Eighty percent and people start dying, Doctor. We've got no choice."
"Launching in sixty, fifty-nine, fifty-eight, fifty-seven, fifty-six. Worldwide nuclear grid now coordinating. Fifty-four, fifty-three."
"You're making a mistake, Colonel. For once, I hope the Sontarans are ahead of you" the Doctor says.
"North America, online. United Kingdom, online. France, online. India, online. Pakistan, online. China, online. North Korea, online. All systems locked and coordinated. Launching in ten, nine, eight, seven, six, five..."
"God save us."
"Four, three, two, one. Zero" but nothing happens. The world map goes blank.
"What is it? What happened? Did we launch? Well, did we?" Mace asks.
"Negative, sir. The launch codes have been wiped, sir. It must be the Sontarans."
"Can we override it?"
"Trying it now, sir."
"Missiles wouldn't even dent that ship, so why are the Sontarans so keen to stop you? Any ideas?" {Y/N} asks looking at Martha.
"How should I know."
"Sontarans within factory grounds. East corridor, grid six" Jenkins says.
"Absolute emergency. Declaring Code Red. All troops, Code Red" Mace says.
"Get them out of there" the Doctor says.
"All troops, open fire."
"Guns aren't working. Inform all troops, standard weapons do not work" Jenkins says "tell the Doctor and {Y/N} it's that cordolaine signal they're the only ones who can stop them" there's sound of gun fire and the line goes silent.
"Greyhound Forty, report. Over. Greyhound Forty, report. Greyhound Forty, report."
"He wasn't Greyhound Forty. His name was Ross. Now listen to me, and get them out of there!" {Y/N} growls slamming her hands on the table, the Doctor places his hand on her arm.
"Trap One to all stations. Retreat. Order imperative. Immediate retreat "they've taken the factory."
"Why? They don't need it. Why attack now? What are they up to? Times like this, we could do with the Brigadier. No offence" the Doctor says.
"None taken. Sir Alistair's a fine man, if not the best. Unfortunately, he's stranded in Peru."
"Launch grid back online, again the grid goes blank.
"They're inside the system, sir. It's coming from within UNIT itself."
"Trace it. Find out where it's coming from, and quickly. Gas levels?"
"Sixty six percent in major population areas, and rising."
*Time skip*
The Doctor, Mace and {Y/N} are in a tiny office.
"Why are they defending the factory only after we were inside?" Mace asks.
"Because they wanted UNIT here. You gave them something they needed. Something now hidden inside the factory. Something precious" the Doctor says, sitting in a chair.
"We've got to recover it. This cordolaine signal thing, how does it work?"
"It's the bullets. It causes expansion of the copper shell."
"Excellent. I'm on it"
"For the billionth time, you can't fight Sontarans" {Y/N} says as she goes to the nearest UNIT officer "phone. Have you got a phone? I need your mobile. Quickly, hurry up" the officer hands the phone over and {Y/N} returns to the tiny office, sits down next to the Doctor and watches Martha on the screen while holding the phone up to her ear.
"What's happened?" Donna asks, "where are you two?"
"Still on Earth. But don't worry, we've got our secret weapon."
"What's that?"
"You."
"Oh. Somehow that's not making me happy. Can't you just zap us down to Earth with that remote thing?"
"Yeah, we haven't got a remote, though we really should. We need you on that ship. That's why we made them move the TARDIS. I'm sorry, but you've got to go outside."
"But there's Sonteruns out there."
"Sontarans. But they'll all be on battle stations right now. They don't exactly walk about having coffee. I can talk you through it."
"But what if they find me?"
"I know, and I wouldn't ask, but there's nothing else we can do. The whole planet is choking, Donna."
"What do you need me to do?"
"The Sontarans are inside the factory which means they've got a teleport link with the ship, but they'll have deadlocked it. I need you to reopen the link."
"But I can't even mend a fuse."
"Donna, stop talking about yourself like that. You can do this. I promise."
"There's a Sonterun. Sontaran."
"Did he see you?"
"No, he's got his back to me."
"Right, Donna, listen. On the back of his neck on his collar there's a sort of plug, like a hole. The Probic vent. One blow to the Probic vent knocks them out."
"But he's going to kill me."
"I'm sorry. I swear I'm so sorry, but you've got to try" there's a moment of silence and a thud on the floor.
"Back of the neck" {Y/N} smiles.
"Now then, you got to find the external junction feed to the teleport."
"What, what's it look like?"
"A circular panel on the wall."
"Big symbol on the front, like a, like the letter T with a horizontal line through it. Or, or, two Fs back to back."
"Oh. Well, there's a door."
"Should be a switch by the side."
"Yeah there is. But it's Sontaran shaped, you need three fingers" {Y/N} squints, leaning back and looking at the Doctor.
"You've got three fingers."
"Oh, yeah. I'm through."
"Oh, you are brilliant, you are."
"Shut up. Right. T with a line through it."
"Got to go. Keep the line open" with that {Y/N} closes the flip phone as Mace enter the room.
"Counter attack" Mace says,
"We've said, you don't stand a chance!" the Doctor says.
"Positions. That means everyone" Mace tosses a gas mask to the Doctor and {Y/N}.
"You're not going without me" Martha says.
"Wouldn't dream of it" the Doctor says.
---
~Bread 🍞