"What the hell's it doing?!" Donna shouted as they hung onto the console.

"The control's not working!" the Doctor replied, trying to flip a few, only to get thrown away.

Jessie shook herself awake before smirking at the hand in a jar at the base of the rotor. "Well, your old hand's excited about whatever we're doing," she commented.

"I thought that was some freaky alien thing!" Donna gasped. "You telling me it's yours?"

"Well," the Doctor held out.

"It got cut off," Steve explained, having heard the story when they were at New Year's. "He grew a new one."

"You are completely impossible!" Donna stated.

"He's not impossible!" Jessie laughed, standing up. "Just a bit unlikely!"

The console let out a bang, and a few sparks showered everywhere before the TARDIS was silent. Jessie ran a hand over Her console. "Are you all right?" she asked.

"I am fine, my Wolf," the TARDIS replied weakly.

Jessie nodded before running for the door.

She looked around outside, and she blinked. "Looks like a junk yard," she observed.

"Why would the TARDIS bring us here, then?" the Doctor asked, stepping out with her.

Steve looked in awe at the fact they'd just moved. "Oh, I love this bit," Martha giggled.

"I thought you wanted to go home," Donna said.

"I know, but all the same, it's that feeling you get . . . "

"Like you swallowed a hamster?"

"Why a hamster?" Steve asked in confusion.

"Don't move!" someone shouted, and Jessie spun, seeing three men approaching with rifles held up. "Stay where you are! Drop your weapons!"

"We're unarmed," the Doctor replied, holding up his hands as Jessie did the same. "Look! No weapons. Never any weapons. We're safe."

"Look at their hands," one of the other soldiers said. "They're clean."

"All right," the leader replied. "Process them." He eyed Jessie. "Her first."

"Say what?" Jessie sputtered before one of the men grabbed her and pushed her arm into a machine.

"Oi!" the Doctor shouted, moving forward. "Leave her alone!"

Jessie grimaced. "I'm going to guess this isn't something nice!" she held out loudly when something inside grabbed her arm and scraped across the back of her hand. "OK, OK, that hurts! That really hurts!"

Eventually, the machine let go of her hand, and Jessie practically danced away, wringing the back of her hand out. "Ow," she muttered, looking at the graze on the back. "That really hurt."

"Incompatible, for some reason," one of the soldiers reported.

"Him, then," the leader said, nodding at the Doctor.

So they grabbed him and forced his arm in. "Hey!" Jessie shouted. "That's my husband!"

"Something tells me this isn't about to check my blood pressure," the Doctor began before grimacing. "Argh!"

"What are you doing to him?" Donna demanded.

"Everyone gets processed," the leader explained.

"It's taken a tissue sample," the Doctor explained before cringing. "Ow, ow, ow, ow, ow, ow, ow, ow," he chanted, bending over a little as he tried to get his hand free. "And extrapolated it. Some kind of accelerator?" he asked before he was finally able to get his hand out.

"Are you all right?" Martha asked.

The Doctor held up his hand, matching the graze on the back of Jessie's hand. "What on Earth?" he asked, turning back around. "That's just - "

"Doctor," Steve warned.

He turned as a pair of glass and metal sliding doors opened, and a slim blonde woman with her hair in a ponytail stepped out, wearing a dark olive green T-shirt, tight-fitting black jeans, and black combat boots. She looked around, as if trying to get her bearings. "Arm yourself," the leader of the soldiers said, handing her a rifle.

"Where did she come from?" Martha asked.

"From me," the Doctor managed to say.

"From both of us," Jessie corrected hazily.

The Doctor blinked, realizing she was right. While the girl had his eyes, she had the natural curl and color of Jessie's blonde tresses, and she held herself confidently the same way. "From both of us," he agreed.

"From you? How?" Donna asked. "Who is she?"

Jessie watched in surprise as the girl expertly disassembled the gun, checking it over, before she put it back together again. "Well, she's," she began before swallowing. "Well . . . she's our daughter."

The girl looked up at that and smiled as she cocked the gun. "Hello, Dad," she greeted. "Mum."

"You primed to take orders?" the leader asked her. "Ready to fight?"

"Instant mental download of all strategic and military protocols, sir," she replied sharply. "Generation five thousand soldier primed and in peak physical health. Oh, I'm ready."

"Did you say daughter?" Steve asked blankly, watching her go join the other soldiers.

"Mmm," the Doctor replied. "Technically."

"Technically how?" Martha asked.

"Progenation," the Doctor answered. "Reproduction from a single organism. Means one parent is biological mother and father. You take a sample of diploid cells, split them into haploids, then recombine them in different arrangement and grow. Very quickly, apparently."

"But some of my cells must have mixed in with the Doctor's from when they tested me," Jessie broke in. "So technically, she has me in there, too. She's just more him than me."

"Something's coming," their daughter spoke up.

Jessie and Steve instantly ran over to help when they saw the soldiers approaching. "Are those fish?" Steve asked in surprise.

"It's the Hath!" the leader shouted, and both sides started firing.

"Apparently they're called Hath," Jessie noted unnecessarily.

"Get down!" the blonde girl called over her shoulder.

Jessie and Steve dropped to one knee, ducking the bullets flying over their heads as they moved away. "We have to blow the tunnel!" the leader called to them. "Get the detonator!"

"I'm not detonating anything!" the Doctor shouted back.

Martha suddenly let out a muffled scream, and Jessie turned wide-eyed, as one of the Hath grabbed her and pulled her away. The blonde woman grabbed the detonator from nearby. "Blow the thing!" the leader shouted at her. "Blow the thing!"

"Martha!" Jessie screamed

"No, don't!" the Doctor warned the girl.

She ignored him and hit the button on the detonator, and Jessie grabbed Steve and the Doctor as a klaxon sounded overhead, and the tunnel collapsed in. "You've sealed off the tunnel," the Doctor said, turning to her. "Why did you do that?"

"They were trying to kill us!" she answered.

"But they've got my friend!"

"Collateral damage," she replied instantly, waving a hand, and Jessie stared at her. "At least you've still got them. He lost both his men. I'd say you came out ahead."

"Her name's Martha," Steve said sharply.

"And she's not collateral damage," Donna added. "Not for anyone. Have you got that, GI Jane?"

"I can go find her," Jessie offered.

"No," the Doctor said immediately.

Right when the remaining soldier said, "You're going nowhere. You don't make sense, you four. No guns, no marks, no fight in you. I'm taking you to General Cobb. Now, move."

"Who said I didn't have a gun?" Jessie asked the Doctor slyly as they walked.

He looked at her sharply before snickering under his breath as they walked.

***

Donna walked a little further ahead to talk to the blonde girl. "I'm Donna," she introduced herself. "What's your name?"

"Don't know," she answered. "It's not been assigned."

"Well, if you don't know that, what do you know?"

"How to fight."

Donna blinked. "Nothing else?"

"The machine must embed military history and tactics, but no name," the Doctor guessed. "She's a generated anomaly."

"Generated anomaly," Steve mused. "Generated."

Donna smiled at him. "Well, what about that? Jenny."

The blonde considered before smiling. "Jenny. Yeah, I like that. Jenny."

"What do you think, Mum?" Donna teased, looking over her shoulder. "Dad?"

"Good as anything, I suppose," the Doctor answered.

"Not what you'd call a natural parent, are you?"

"Let's see, they stole tissue samples at gunpoint and processed it," Jessie said sarcastically. "No, that is definitely normal parenting. What do you think, Donna?"

"Rubbish," Donna snorted. "My friend Nerys fathered twins with a turkey baster."

"Say what now?" Jessie asked, blinking.

Donna rolled her eyes. "Don't bother her."

"You can't extrapolate a relationship from a biological accident."

"Can't Child Support Agency?" Steve asked.

Jessie sighed. "Look, just because we share certain physiological traits with simian primates doesn't make us a monkey's uncle and aunt, does it?"

"I'm not a monkey," Jenny told them. "Or a child."

Jessie rolled her eyes at that, but she couldn't help but smile. "No offense, but she understands about as much as you do about Earth sayings," she told Steve.

***

"So where are we?" Jessie asked when they entered the large camp, looking around at the multiple cloning chambers. "What planet is this?"

"Messaline," the leader, Cline, replied. "Well . . . what's left of it."

"Six six three seventy five deceased. Generation six six seven one, extinct. Generation six six seven two forty six deceased. Generation six six eight zero fourteen deceased. Generation six - "

"But this is a theater," Donna observed.

"Maybe they're doing Miss Saigon," Jessie joked.

"It's like an underground town or city," Steve added, folding his arms. "I wonder why."

The Doctor straightened when a military man with a trimmed white beard approached. "General Cobb, I presume," he said, taking Jessie's hand and pulling him to her to him.

"Found in the western tunnels, I'm told, with no marks," Cobb said, looking them over. "There was an outbreak of pacifism in the eastern zone three generations back, before we lost contact. Is that where you came from?"

"Eastern zone? That's us, yeah. Yeah. I'm the Doctor, this is Donna - "

"I'm the Bad Wolf, and this is Steve," Jessie added, nodding at Steve, who nodded politely to Cobb.

"And I'm Jenny," the blonde finished.

"Don't think you can infect us with your peacemaking," Cobb warned. "We're committed to the fight, to the very end."

"Well, that's all right," the Doctor replied. "We can't stay, anyway. We've got to go and find out friend."

"That's not possible," Cobb told him, shaking his head. "All movement is regulated. We're at war."

"Yes, I noticed," the Doctor said dryly. "With the Hath. But tell me, because we got a bit out of circulation, eastern zone and all that. So who exactly are the Hath?"

***

"Back at the dawn of this planet, these ancient halls were carved from the Earth," Cobb told them as they gathered around a holographic table. "Our ancestors dreamt of a new beginning. A colony where human and Hath would work and live together."

"So what happened?" Jessie asked.

"The dream died," he replied simply. "Broken, along with Hath promises. They wanted it all for themselves. But those early pioneers, they fought back. They used the machines to produce soldiers instead of colonists, and began this battle for survival."

"There's nothing but earth outside," Steve told them. "Why is that? Why build everything underground?"

"The surface is too dangerous."

"So why build windows in the first place?" Steve asked.

"And what does this mean?" Donna asked, investigating a plaque with the numbers 60120707 on it.

"The rites and symbols of our ancestors," Cobb replied. "The meaning's lost in time."

"How long's this war gone on for?" the Doctor asked.

"Longer than anyone can remember. Countless generations marked only by the dead."

"What, fighting all this time?" Donna asked.

"Because we must," Jenny spoke up. "Every child of the machine is born with this knowledge. It's our inheritance. It's all we know. How to fight, and how to die."

"Well, ain't that cheery," Jessie commented before turning to Cobb. "You don't happen to have a map of the place, do you?"

Cobb pulled up a holographic image of the tunnels, and the Doctor looked at it. "Does this show the entire city, including the Hath zones?" he asked.

"Yes," Cobb replied. "Why?"

"It'll help us find Martha," Jessie replied simply.

"We've more important things to do," Cline interrupted. "The progenation machines are powered down for the night shift, but soon as they're active, we could breed a whole platoon from you four."

"I'm not having sons and daughters by some great big flipping machine!" Donna growled before wincing and looking at Jenny. "Sorry. No offense, but you're not . . . well, I mean, you're not real."

"You're no better than them," Jenny accused, looking at the Doctor and Jessie. "I have a body. I have a mind. I have independent thought. How am I not real? What makes you better than me?"

"Well said, soldier," Cobb praised. "We need more like you if ever we're going to find the Source."

"Ooo, the Source," Jessie said before blinking and looking at the Doctor. "Source. Capital S."

"What's the Source?" the Doctor asked.

"The Breath of Life," Cobb replied mysteriously.

"Oh, I can't wait to hear this one," Jessie commented, leaning on her hand and looking at him. "That would be . . . ?"

"In the beginning, the great one breathed life into the universe," Cline replied. "And then she looked at what she'd done, and she sighed."

"Well, it's 'she,' I'll give them points for that," Jessie said.

"She," Jenny said thoughtfully. "I like that."

"Right, so it's a creation myth," the Doctor said.

"It's not a myth, it's real," Cobb told him. "That sigh. From the beginning of time, it was caught and kept as the Source. It was lost when the war started. But it's here, somewhere. Whoever holds the Source controls the destiny of the planet."

Jessie poked and prodded at the map a little before holding out her hand. "Sonic."

The Doctor reacted instantly, pulling his out and handing it to her before blinking. "Wait, where's yours?"

"I'm not about to bend down anytime soon," she replied before using the sonic screwdriver a little bit, making the map buzz. "And there we are! There's a supressed layer of information on this map. So, if I just do . . . this . . . " She sonicked the map, and a new set of tunnels appeared.

"What is it?" Donna asked. "What's it mean?"

"There are a whole complex of tunnels that were hidden from sight," Jessie explained.

"That must be the lost temple," Cobb guessed, pointing to one place in particular. "The Source will be inside. You've shown us the way! And look, we're closer than the Hath." He smiled. "It's ours." He turned to Cline. "Tell them to prepare to move out. We'll progenate new soldiers on the morning shift, then we march. Once we reach the Temple, peace will be restored at long last."

"Hold on," Steve said, frowning. "Call me old fashioned, because I actually am, but if you really wanted peace, couldn't you just stop fighting?"

"Only when we have the Source," Cobb answered. "It'll give us the power to erase every stinking Hath from the face of this planet."

The Doctor blinked. "Hang on, hang on," he said slowly. "A second ago, it was peace in our time. Now you're talking about genocide."

"For us, that means the same thing."

"Then you need a better dictionary," Jessie remarked. "Tell you what, look up genocide when you do. You'll see a little picture of the two of us there with the caption 'over our dead bodies.'"

"And you're the one who showed us the path to victory," Cobb noted. "But you can consider the irony from your prison cell. Cline? At arms."

"Oi, oi, oi!" Donna protested as a few soldiers aimed rifles at them. "All right! Cool the beans, Rambo!"

"Take them," Cobb ordered. "I won't have them spreading treason. And if you try anything, Doctor, I'll see that your woman dies first."

The Doctor blinked, seeing him look at Donna. "No, we're . . . we're not a couple!"

"I am definitely not his woman," Donna agreed.

"Thought it might have been obvious who was," the Doctor added, pulling Jessie against his body tightly.

"Come on," Cline ordered. "This way."

"We're going to stop you, Cobb," the Doctor warned. "You need to know that."

"I have an army and the Breath of God on my side, Doctor," Cobb scoffed. "What'll you have?"

"Two Avengers and the might of more Gods," the Doctor replied immediately. "And this." He tapped the side of his head.

"Lock them up and guard them," Cobb ordered.

"What about the new soldier?" Cline asked.

Cobb considered Jenny. "Can't trust her. She's from pacifist stock. Take them all."

***

"More numbers," Donna muttered, looking at their cell number: 60120716. "They've got to mean something."

"Makes as much sense as the Breath of Life story," the Doctor huffed.

"You mean that's not true?" Jenny asked in confusion.

"No, it's a myth," Donna told her. "Isn't it, Doctor?"

"Yes, but there could still be something real in that temple. Something that's become a myth. A piece of technology, a weapon."

"So the Source could be a weapon, and we've just given directions to Captain Nutjob?" She blinked. "No offense, Captain."

"None taken," Steve replied in amusement.

"Oh, yes," the Doctor told her.

"Sorry about that," Jessie said with a wince.

"Not good, is it?" Steve guessed.

"No, it's not," Jessie told him, straightening. "That's why we need to get out of here, all in one piece, find Martha, and stop Cobb from slaughtering the Hath - " She broke off, realizing Jenny was staring at her in something akin to . . . awe? "What . . . what are you . . . ?" She looked around in confusion. "What are you staring at?"

"You keep insisting you're not a soldier, both of you," Jenny replied. "But look at you, drawing up strategies like a proper general."

"She's trying to stop the fighting," the Doctor corrected.

"Isn't every soldier?" Jenny asked in confusion.

"Touché," Steve told her with a nod.

"Well, I suppose, but that's . . . that's . . . " the Doctor sputtered.

"We haven't got time for this," Jessie sighed, walking over to Donna. "Donna, gimme your phone. Time for an upgrade." She pulled out her sonic, flipping it in the air before taking Donna's phone.

"And now you've got a weapon," Jenny noted.

"I always have a weapon," she said shortly. "And I avoid killing unless absolutely necessary, thank you very much."

"But you're using it to fight back!" Jenny laughed. "I'm going to learn so much from you! You are such a soldier!"

Jessie bristled, closing her eyes. "Steve, Donna, will you tell her?" she snapped.

"Oh, you are speechless!" Donna laughed. "I'm loving this! You keep on, Jenny."

Jessie growled, calling Martha and putting the phone to her ear. "Doctor?" Martha asked.

"Close," Jessie replied with a grin. "But you're alive!"

"Bad Wolf!" Martha cheered. "Oh, am I glad to hear your voice! Are you all right?"

"We're all right," Jessie replied. "The Doctor's here with me, and Donna and Steve are here, too. We're fine. What about you?"

"And Jenny," Donna spoke up. "She's fine, too."

"Yeah, fine, Jenny's fine, too. She's the woman from the machine, the soldier. My and the Doctor's daughter. Except she isn't, from the machine . . . she's . . . " She sighed, pinching the bridge of her nose. "Dear Odin almighty, this is confusing. Anyway, where are you?"

"I'm in the Hath camp," Martha replied. "I'm OK, but something's going on. The Hath are all marching off to some place that's appeared on this map thing."

"God damn it all," Jessie spat angrily and rather loudly, making everyone in the cell jump, even Jenny. "That was me. Both armies are headed that way right now. There's going to be a bloodbath!"

"What do you want me to do?"

"Just stay where you are," she answered immediately. "If you're safe there, don't move, do you hear me?"

"But I can help - !" The dial tone hit, and Jessie closed her eyes, ending the call. "Her phone's dead," she muttered, tossing it back to Donna, who caught it hurriedly.

"To war!" the soldiers began shouting outside.

"They're getting ready to move out," the Doctor noted. "We have to get past that guard."

"I can deal with him," both Jessie and Jenny said at the same time before both of them looked at each other.

"No, no, no, no," the Doctor insisted. "Neither of you are going anywhere."

"You just don't want me distracting someone else, do you?" Jessie teased with a smirk.

"No," the Doctor replied easily.

"Why not?" Jenny asked.

"You belong here with them," the Doctor replied.

"She belongs with us!" Donna told him. "With you! She's your daughter!"

"She's a soldier," the Doctor corrected. "She came out of that machine."

"Doctor, this body was born from a war," Jessie told him softly. "That very well might have come from me."

"And I was made into a super soldier from a serum," Steve added.

"We know that bit," Donna told the Doctor. "Listen, have you got that stethoscope?" The Doctor quirked an eyebrow. "Give it to me. Come on."

The Doctor handed it to her, and Donna slipped it into her ears and approached Jenny. "What are you doing?" Jenny asked in confusion, backing away.

"It's all right," Donna soothed her. "Just hold still." Jenny did, rather reluctantly, and Donna listened to both sides of the girl's chest. After a while, she smiled and turned to the two Time Lords. "Come here. Listen, and then tell me where she belongs."

Jessie shuffled over and took the stethoscope from Donna, slipping them in her own ears and taking a listen. She started on the left side, found one heartbeat, then moved to the other, and she swallowed.

There was another.

She removed the stethoscope from her ears and looked at her husband, nodding. "She's got two hearts," she whispered.

"Exactly," Donna told her.

"What's going on?" Jenny asked in confusion.

"Does that mean she's a . . . what do you call a female Time Lord?" Donna asked, looking at Jessie.

"Time Lady," she replied, looking at the Doctor. "What do you think?"

"I don't know what to think," he replied, not taking his eyes off of Jenny. "After the Time War, and after everything I've lost, and now we've got a daughter . . . "

"What's a Time Lord?" Jenny asked.

"It's who I am," the Doctor replied. "It's where I'm from."

"And I'm from you," Jenny told him.

"You're from both of us," Jessie told her. "But listen, you're just an echo. There's so much more to being a Time Lord. So much knowledge, a code, a shared history, and a shared suffering. That's all gone now. It's all gone, forever."

"What happened?" Jenny asked softly.

"There was a war," the Doctor answered.

"Like this one?"

"Bigger," the Doctor replied with a dark chuckle. "Much bigger."

"Much bigger than the two wars I've fought in, Jenny," Steve spoke up. "And that's saying something."

"And you fought and killed?" Jenny asked.

"Yes," the Doctor admitted.

Jenny turned to Jessie. "And you?"

"Yeah," Jessie replied, thinking of Pompeii and the pig men, and all of the Daleks. "More often than I'd like."

"Then how are we different?" Jenny asked.

***

Some time later, Jenny sauntered up to Cline, who was guarding the cell. "Hey," she whispered to him.

"I'm not supposed to talk to you," he said gruffly. "I'm on duty."

"I know," she replied. "Guarding me. So . . . does that mean I'm dangerous, or that I need protecting?"

"Protecting from what?" Cline asked, turning towards her.

Jenny smiled. "Oh, I don't know. Men like you?" She smiled, pulling him to her and kissing him -

As Jessie phased through the door, took Cline's pistol, and pressed it against his head. Jenny smiled innocently at Cline when he froze. "Keep quiet, and open the door," she said sweetly.

Donna snickered from where she was hiding with the Doctor and Steve out of sight. "I'd like to see the two of you try that," she laughed.

"That's the way out," Steve said, pointing to a staircase.

Jessie pulled out her ICER, took aim, and took one single shot, and the guard fell over, knocked out. "What was that?" Jenny asked in shock.

"A way of effectively putting someone out of the equation without killing them," Jessie replied. She turned to the Doctor. "Should we teach our two new friends the most important word we've learned?"

"Yes, we should," the Doctor agreed.

"What's that?" Jenny asked.

The two of them grinned wildly. "RUN!" they shouted gleefully, and Jessie laughed, grabbing the map from the guard as they took off up the stairs.

***

"Wait," the Doctor told them as they stopped in a tunnel. "This is it. The hidden tunnel." He looked around. "There must be a control panel."

"It's another one of those numbers," Steve noted. "They're everywhere, aren't they?"

"The original builders must have left them," Jessie noted as she looked at the number: 60120714. "Maybe an old cataloguing system?"

"You got a pen? Bit of paper?" Donna asked, and Jessie frowned, digging through her pockets and finding some. "Because, do you see? The numbers are counting down. This one ends in one four. The prison cell said one six."

"Always thinking, all of you," Jenny commented. "Who are you people?"

"I told you, I'm the Doctor," the Doctor replied.

"The Doctor," Jenny repeated. "That's it?"

"That's all he ever says," Donna replied.

"Save one," the Doctor said, smiling softly at Jessie, who smiled back.

"So, you don't have a name either?" Jenny asked. "Are you an anomaly, too?"

"No," the Doctor scoffed.

"Oh, come off it!" Donna snorted. "You're the most anomalous bloke I've ever met!"

"That's my husband!" Jessie whined.

"Well, with the whole . . . " Steve made a gesture. "Changing thing you do, that really isn't normal."

"Ever heard of the word 'alien' before?" Jessie asked.

Steve grinned at her. "You have no idea how much I've missed you."

"Watch it, Captain," the Doctor warned, pointing his sonic screwdriver at him. "That's my wife."

"As if anyone could have stolen her from you all those years ago," Steve chuckled.

"Good point," the Doctor admitted before brightening when he got into the control panel. "Here it is!"

"And Time Lords," Jenny added. "What are they for, exactly?"

"For?" the Doctor repeated, blinking. "They're not . . . they're not for anything."

"So what do you do?"

"We travel through time and space," Jessie replied, shrugging. "Nothing big, really."

"They save planets, rescue civilizations, defeat terrible creatures," Donna exaggerated, then nodded. "And run a lot. Seriously, there's an outrageous amount of running involved."

"Saved my life with that word, as a matter of fact," Jessie recalled.

"Got it!" the Doctor crowed as the tunnel door slid open.

"Squad five, with me!" Cobb's voice shouted distantly.

"Now . . . " The Doctor turned to them all. "What were you saying about running?"

***

Jessie skidded to a stop when she saw the lasers blocking their way. "Oh, hell no!"

"That's not mood lighting, is it?" Donna asked hopefully.

In response, Jessie rummaged in her pocket before Steve found a piece of piping on the floor and tossed it into the lasers. It was fried and disintegrated immediately. "No, I don't think that's mood lighting," he commented.

"Arming device," the Doctor explained, using his sonic on a box nearby.

"There's another one," Steve told Donna, pointing to a number nearby: 60120713.

"Always eight numbers, counting down the closer we get," Donna muttered.

"Right! Here we go!" the Doctor said, getting into the control box."

"You'd better be quick," Donna warned.

"Corridor!" Cobb shouted nearby.

"The General," Jenny whispered before turning.

"Where are you going?" the Doctor asked with a frown.

"I can hold them up," she replied.

"No," Jessie told her firmly. "We don't need any more dead."

"But it's them or us," Jenny told her.

"It doesn't mean you have to kill them!"

"I'm trying to save your life!"

"Listen to me," Jessie told her in a whisper. "The killing. After a while, it infects you. And once it does, you're never rid of it."

"We don't have a choice!"

"We always have a choice," the Doctor pointed out.

Jenny swallowed. "I'm sorry," she whispered before turning to run.

"Jenny!" the Doctor shouted.

Steve shook his head. "I'll stay with her," he told them before going after Jenny.

"I told you," the Doctor said. "Nothing but a soldier."

"So was I," Jessie whispered.

***

Jenny picked up a spare machine gun ran around the corner to see Cobb's men approaching. "There she is!" one of the soldiers shouted. "Open fire!"

Jenny started shooting at them, ducking to avoid other people's fire when someone's hand on her arm stopped her. She looked back at Steve, who swallowed. "Your mother is the most incredible person I know," he told her. "She has her quirks. She has her issues. And she has killed many times, again and again. She gave her life to save this world, and what she went through put her through hell. Don't turn into someone like that, please. For them."

Jenny stared at him, then looked at her gun. Her mother . . . she almost looked the same age as her. And already, she was seeing similarities. One of them being how comfortable she was with a gun. She swallowed.

"That's it!" Donna called from behind them.

"Jenny, leave it!" the Doctor called. "Let's go!"

"Come on, Steve!" the Bad Wolf shouted.

Jenny and Steve stood, and Cobb stepped forward. "You're a child of the machine," Cobb told her. "You're on my side. Join us. Join us in the war against the Hath. It's in our blood, girl. Don't deny it."

Jenny looked at her gun, then took a deep breath. "I'm not you," she replied, taking aim -

And firing a hole in the pipe at the ceiling, steam billowing down.

"That's her girl!" Steve told her with a grin, taking her hand and leading them back.

***

"Jenny! Steve!" Jessie shouted when she saw the two run around the corner.

"Come on! That's it!" the Doctor encouraged with a grin.

"Hurry up!" Donna warned.

The lasers sprung up, and Steve quickly flung out an arm, stopping Jenny dead. "No, no, no, no, no, no!" the Doctor shouted. "The circuit's looped back!"

"Zap it back again!" Donna told him.

"The controls are back there!"

"They're coming," Steve said, looking behind him.

Jessie looked over at the, then took a deep breath. "Jenny!" she called, and the girl looked back. "Just . . . how much of my genes have you gotten exactly?"

Jenny broke out in a grin. "Oh, watch and learn, Mother."

She dropped her machine gun and took off somersaulting through the lasers. Steve grinned and took off after her in dives and jumps and dodges, all from his super soldier days during World War II against HYDRA. "No way!" Donna gasped, her jaw dropping.

Jenny finished with a flourish as Jessie laughed gleefully. "Not impossible, Donna!" she told her. "Just a bit unlikely. You," she enunciated, poking Jenny in the chest, are brilliant!" she laughed, giving her a hug. "You were brilliant! And you!" She hugged Steve as well. "That was incredible!"

"Like mother, like daughter," the Doctor told her.

"I didn't kill him," Jenny said proudly. "General Cobb. I could have killed him, but I didn't. You were right. I had a choice."

"Twelves!" Steve suddenly called out.

"Oh, hello," Jessie said as Cobb and his men appeared on the other side of the lasers.

"At arms!" Cobb ordered as Steve led Donna and Jenny away.

"I warned you, Cobb," the Doctor told him darkly. "If the Source is a weapon, I'm going to make sure you never use it."

"One of us is going to die today, and it won't be me," Cobb snarled.

"And again!" Jessie shouted, grabbing the Doctor's wrist and tugging him away as the onslaught of bullets chased after them.

***

"So you two travel with them?" Jenny asked Donna and Steve. When they nodded, she frowned. "But you're not together?"

"I think that's the first time someone's realized that we're the ones together," Jessie laughed, taking the Doctor's hand.

"No, no," Donna quickly assured her. "No way."

"No, we're just friends," Steve told her before frowning at Donna. "I hope."

"Friends," Donna confirmed with a smile. "Yeah. We're friends."

"And what's it like?" Jenny asked. "The traveling?"

"Oh, never a dull moment," Donna told her. "It can be terrifying, brilliant, and funny, sometimes all at the same time. I've seen some amazing things, though. Whole new worlds."

"Oh, I'd love to see new worlds," Jenny sighed happily.

"You will," Steve told her before raising an eyebrow. "Won't she? Doctor? J?"

"Hmm?" the Doctor asked, and the two of them looked over their shoulders.

"Do you think Jenny will see any new worlds?"

The Doctor and Jessie looked at each other and smiled. "I suppose so," he replied.

Jenny's eyes widened slightly. "You mean . . . you mean you'll take me with you?" she breathed.

"Well, we can't leave you here, can we?"

"Oh, thank you, thank you, thank you!" Jenny cheered, giving them both a huge hug that also seemed inherited from her mother. "Come on! Let's get a move on!"

"Careful!" Jessie called after Jenny as she ran ahead. "There might be traps!"

"Kids," Steve chuckled. "They never listen."

Donna was paying attention to the Doctor, who was staring after her. "Oh, I know that look. I see it a lot round our way. Blokes with pushchairs and frowns. You've got dad shock."

The Doctor blinked. "Dad shock?"

"Sudden unexpected fatherhood. Takes a bit of getting used to."

"No, it's not that," the Doctor assured her, and Jessie took his hand, knowing what he was thinking of.

"Well, what is it, then?" Donna asked. "Having Jenny in the TARDIS? Is that it? What's she going to do, cramp your style? Like you've got a sports car, and she's going to turn it into a people carrier?"

"I don't think that's it, Donna," Steve told her, stopping to look at the Doctor as well.

"Donna, I've been a father before," the Doctor told her.

Donna stopped at that. "What?" she whispered.

"I lost all that a long time ago, along with everything else."

"I'm sorry," she told him, tears sparkling in her eyes. "I didn't know. Why didn't you tell me? You talk all the time, but you don't say anything."

"I know," the Doctor replied simply, tugging Jessie closer and holding her close. "I'm just . . . " He looked in the direction Jenny had gone. "When I look at her now, I can see them. The hole they left, all the pain that filled it. I just don't know if I can face that every day."

Jessie raised her hand to tilt his face to her. "It's not going to stay like that," she promised him with a smile. "Think of everyone else you've got. She'll help you. We both will, yeah?"

"And me," Donna piped up.

"And everyone at SHIELD knows your story, Doctor," Steve added, putting his hand on his shoulder. "You've got so many people. Just take the time to realize that."

The Doctor swallowed. "But when they died, that part of me died with them. It'll never come back. Not now."

"I tell you something, Doctor," Donna told him. "Something I've never told you before. I think you're wrong."

The spatter of gunfire brought their attention away, and Jenny ran up to them. "They've blasted through the teams," she reported. "Time to run again." She grinned. "Love the running. Yeah?"

"Love the running," Jessie agreed with a laugh as they took off.

***

"We're trapped," Donna realized when they hit a dead end.

"Can't be," the Doctor muttered as they looked around, and he found a wall nearby. "This must be the Temple. This is a door."

"Again," Steve pointed out the number at the top: 60120712.

"We're down to one two ow," Donna said, writing it down.

"I've got it!" the Doctor crowed.

"I can hear them," Jenny warned from where she was keeping lookout.

"Nearly done!"

"These can't be a cataloguing system," Donna said with a frown.

"They're getting closer," Steve added, frowning and looking back by Jenny.

"They're too similar," Donna continued, wrinkling her brow. "Too familiar."

"Not yet!" Jenny called them.

"Now!" Jessie shouted as the door opened. "Got it!"

"They're coming!" Jenny cried as they ran through. "Close the door!" Jessie sonicked it shut, and Jenny nodded. "Oh, that was close."

"Well, it's not fun otherwise!" Jessie told her with a smirk.

"It's not what I'd call a temple," Donna said, looking around.

"It looks more like," Jenny began.

"Fusion drive transport," the Doctor said. "It's a spaceship."

"Is it the original one?" Steve asked. "The one they all first arrived in?"

"Well, it could be," the Doctor mused, "but the power cells would have run down after all that time. This one's still all powered up and functioning. Come on."

They ran up to the stairs, and Jenny stopped when she saw someone cutting through the other door. "It's the Hath," she told them. "That door's not going to last much longer. And if General Cobb gets through down there, war's going to break out."

"Found the ship's log," Jessie announced from where she was getting into a screen. She narrowed her eyes, reading as it flew across the screen. "First wave of Human/Hath co-colonization of planet Messaline."

"So it is the original ship," Jenny deduced.

"What happened?" Donna asked.

"Phase one, construction," Jessie muttered as she read. "They used robot drones to build the city."

"But does it mention the war?" Steve asked.

Jessie shook her head as more reports flew across. "Final entry," she told them. "Mission commander dead. Still no agreement on who should assume leadership. Hath and humans have divided into factions." She straightened. "So that must be it. A power vacuum. The crew divided into two factions and turned on each other. Start using the progenation machines, and suddenly there are two armies fighting a never-ending war."

"Two armies who are now both outside," Jenny observed.

"Look at that," Steve told them, pointing at a display with the planet, along with the number 60120724.

"It's like the numbers in the tunnels," the Doctor remarked.

"Hold on," Donna muttered, looking at her piece of paper. "No, no, no, no. Listen, I spent six months working as a temp in Hounslow Library, and I mastered the Dewey Decimal System in two days flat. I'm good with numbers. It's staring us in the face!"

"What is?" Jenny asked.

"It's the date!" Donna crowed smugly. "Assuming the first two numbers are some big old space date, then you've got year, month, day. It's the other way round, like it is in America."

"Like the Byzantine Calendar," Jessie mused, then blinked, looking at Donna. "Are you insulting the way we do things?"

"The codes are completion dates for each section," Donna continued, ignoring Jessie. "They finish it, they stamp the date on. So the numbers aren't counting down. They're going out from here, day by day, as the city got built."

"Good work," Steve praised.

Donna groaned. "But you're still not getting it! The first number I saw back there was 6012017. Look at the date today."

"0724," Jessie said before her eyes widened. "No!"

"What does it mean?" Jenny asked.

"Seven days," the Doctor breathed, getting it as well.

"That's it," Donna agreed, nodding. "Seven days."

"Just seven days!"

"What do you mean, seven days?" Jenny asked.

"Seven days since war broke out," Jessie replied.

"This war started seven days ago," Donna explained. "Just a week. A week!"

"They said years!" Jenny gasped.

"No, they said generations," Steve realized. "And if they've all come out of those machines - "

"They could have twenty generations in a day," the Doctor finished. "Each generation gets killed in the war, passes on the legend. Oh, Donna, you're a genius!"

"But all the buildings, the encampments, they're in ruins!" Jenny argued.

"No, they're not ruined," Jessie corrected. "They're just empty right now. They're waiting to be populated." She looked around. "So. They've mythologized their entire history. That's something. The Source must be part of that, too. Come on."

They kept running, and Jessie nearly slammed headfirst into Martha. "Bad Wolf!" Martha cheered.

"Martha!" Jessie squealed, hugging her tightly. "I should've known you wouldn't stay away fro the excitement!"

"Martha," Steve greeted with a smile and a hug.

Martha hugged him, too, then turned to Donna. "Donna."

"Oh, you're filthy," Donna told her. "What happened?"

Martha looked down over her mud-soaked clothes. "I, er . . . took the scenic route," she mumbled.

"That's my best friend!" Jessie whooped, patting her on the back.

"Positions!"

"That's the General," the Doctor said, looking around. "We haven't got much time."

"We don't even know what we're looking for!" Donna told him.

Martha sniffed. "Is it me, or can you smell flowers?"

"Maintain defensive positions!"

"Yes," the Doctor confirmed, sniffing as well. "Bougainvillea."

"So we just follow our nose," Jessie decided.

"Oh, that reminds me of the Blitz," the Doctor whined as they headed through the ship.

"What did I miss at the Blitz?" Jessie asked.

"Nancy commented on my nose."

Jessie burst out laughing and shook her head, punching him in the arm. "In her defense, you did have a nose on that body," she giggled.

***

They emerged into the hydroponics, and Jessie's eyes widened as they took in the greenery around them. "Wow," she breathed.

"Oh, yes," the Doctor agreed with a smile. "Yes. Isn't this brilliant?"

"Over here," Steve called.

They joined him to see him inspecting a glowing globe on a pedestal with wires running around it. "Is that the Source?" Donna asked.

"It's beautiful," Jenny whispered.

"What is it?" Martha asked.

"Terraforming," the Doctor explained. "It's a third generation terraforming device."

"So why are we suddenly in Kew Gardens?" Donna asked.

"Because that's what it does," Jessie told her. "All this, but bigger. Much bigger. It's in a transit state. Producing all this must help keep it stable before they finally - "

"Hi ho!" Jessie called in warning as the Hath and the humans all emerged around them, guns locked and loaded.

"Stop!" the Doctor shouted as he, Jessie, and Steve ran in between them, Jessie facing the Hath, Steve the humans, the Doctor in the middle trying to hold them both off. "Hold your fire!"

"What is this?" Cobb asked in disgust. "Some kind of trap?"

"You said you wanted this war over," Steve told him.

"I want this war won!" Cobb snapped.

"You can't win," the Doctor interrupted. "No one can. You don't even know why you're here! Your whole history!" Everyone hesitated at that. "Your whole history. It's just Chinese whispers, getting more distorted the more it's passed on."

"This is the Source," Jessie continued, walking over to the Source. "This is what you're fighting over. It's a device to rejuvenate a planet's ecosystem. It's nothing mystical. It's from a laboratory. It's not from some creator. It's a bubble of gas."

"A cocktail of stuff for accelerated evolution," the Doctor continued on. "Methane, hydrogen, ammonia, amino acids, proteins, nucleic acids. It's used to make barren planets habitable." He gestured around them. "Look around you! It's not for killing. It's bringing life. If you allow it, it can lift you out of these dark tunnels and into the bright, bright sunlight. No more fighting. No more killing." Jessie hefted the globe into her hands. "I'm the Doctor, and this is the Bad Wolf And we declare this war is over!"

Jessie smashed the globe on the ground, and wisps of green and gold energy flew up into the air. The Hath watched it go, and they were the first to start putting their weapons down. And then, so did the humans. "What's happening?" Jenny asked.

"The gases will escape and trigger the terraforming process," a different voice answered. Everyone's gaze flew up above to where some of the plants were hanging, and Steve's jaw dropped. "Oh my God," he gasped.

A young and petite dark-haired woman was sitting on one of the railings, smiling down at them, her hair tied in a ponytail. Freckles were sprinkled across her face, and she was wearing the standard SHIELD attire. Her eyes glittered golden brown, and she spoke with an American accent. She smiled and waved. "Hello!"

"Speaking of the Blitz," the Second managed to say as she waved up to her First self.

The First beamed and dropped down along with them. "I told you I'd be back."

"What does that mean?" Steve asked.

"It means a new world," the First began before she saw something over the Doctor's shoulder, and her eyes widened. "No!"

The Second spun, about to see what was wrong, when Jenny jumped in the way of the Doctor, and the bullet Cobb fired hit her in the throat. Jenny clutched at the bullet wound, and the Doctor caught her, laying her on the ground. "Jenny?" he asked desperately. "Jenny! Talk to me, Jenny!"

"Is she going to be all right?" Donna asked worriedly as Martha checked her pulse.

Martha only shook her head.

"A new world," Jenny whispered hoarsely. "It's beautiful."

The First squatted down by her. "And you can still see it," she said gently before looking up at Steve. "Do you want to?"

Jenny swallowed hard. "Yes," she whispered.

The First nodded. "Close your eyes."

"She can't close them!" the Doctor protested.

"Yes, she can," the First interrupted, looking up at him, her eyes flaring gold. "Do you trust me?"

"I do," Steve interrupted.

"And so do I," Martha said firmly.

Jenny closed her eyes, and the First placed her hands on either side of her head, closing her own eyes. The gold of the Vortex spun around her, and flares of green from the Source began to draw in as well. Jenny's bullet wound began to close, and the next time the First's eyes opened, so did Jenny's. "Whole new places to see," the First told her with a smile. "And you have a lot of running to do."

"Jenny!" the Doctor breathed, hugging her tightly.

The Second hugged her as well, and Jenny wrapped her arms around both of them. The First smiled at them before turning to Steve. "Nice to see you again, Steve."

"And you," he managed to say.

Martha laughed. "You are so brilliant!" she declared.

The First smiled and winked. "I know I'll be seeing you soon."

The Second's arm tightened around Jenny when she looked back over her shoulder at the humans. Her anger began to bubble when she saw the gun lying at Cobb's feet, Cline and a few of his men keeping Cobb on his knees. She snarled, standing and storming over, taking the gun from where it was on the floor and holding it at Cobb's head. "You know I could," she hissed to him.

Cobb looked up at her, fear in her eyes, and the Second could see from the corner of her eye, both Jenny and the Doctor staring at her in shock, Steve in bitter understanding, and Martha and Donna in horror.

But the First was just sitting there in a crouch, head tilted at an angle, as if curious to see what she decided. As if she knew what she would decide.

And the Second moved the gun centimeters away and fired instead, just missing Cobb's head. Cobb flinched, and the Second flicked the safety on, leaning in close. "I never would," she sneered angrily. "Have you got that?" she shouted angrily at the humans. "I never would!" She tossed the gun away with a clatter, making more than one person flinch as she stood in the center of the area. "When you start this new world, this world of Human and Hath, remember that! Make the foundation of this society someone who never would!"

***

Jenny was still quivering when they gathered in the encampment nearby, the Doctor's arm around her, Steve close by as well. The Second was sitting in a cross-legged position, staring at the floor, almost as if she was frozen there. Martha and Donna seemed hesitant to go over to her, seeing she was still on edge. The First was the only one who seemed relaxed as she talked to Cline and the Hath that were there. "The terraforming is starting," she explained. "Build a city, nice and safe underground, strip away the top soil, and there it is." Cline nodded and left with the Hath, and the First turned to them. "And now I've got an appointment at the beginning of the Year That Never Was," she told them.

"Thank you," Jenny whispered. "Thank you for everything . . . Mum."

The First cracked a grin at that. "You're welcome, sweetie," she replied before wincing. "No. That's not you."

"Oi!" the Doctor complained.

"No, I mean, that's not your nickname," the First quickly corrected before getting off topic. "Who was it?" Steve cleared his throat, and the First jumped. "Right!" she said loudly before pointing at the Doctor. "In advance . . . " She whalloped him hard on the back of the head.

"Ow!" he shouted, bending over and rubbing the back of his head.

"What was that for?" Donna asked angrily.

"In advance," the First replied with a glare at him, "for when you see me the next time."

"I get the feeling I shouldn't look forward to it," the Doctor muttered.

The First shook her head and turned to Steve. "And you don't need one to know what you need to do, right?"

"No," Steve replied quickly.

"Good." She gave him a tight hug. "Good luck, Rogers."

"You, too, Nightshade."

"I'm not Nightshade." She grinned, eyes flaring again. "I'm Bad Wolf." She turned to Martha with a smile. "I'll be seeing you very soon."

"I was very happy to see you," Martha told her with a grin before hugging her.

The First smiled at Donna before padding over to the Second and crouching down. "Hey." She nudged her. "I know you wanted to shoot him."

"I should have," the Second muttered, not looking up from the floor.

"But you had a choice," the First told her. "Not many people have those kinds of choices." She looked over her shoulder at Jenny and the Doctor. "Don't let that one go to waste."

"I won't," the Second promised.

The First smiled at her, then her eyes darkened. "The next time he sees me is not going to be pleasant," she warned. "The Laws of Time are at stake. Beware the knocking."

"What knocking?" the Second asked worriedly. "What does that mean?"

"I can't say anything else," the First replied, shaking her head. "But promise me you won't let him go off alone."

The Second stared at her, then nodded. "I won't."

The First smiled. "Good luck," she said. "Valiant, here I come."

The Second stood up and walked over. "Let's go," she whispered.

The First watched them leave before smiling softly. "And so begins the rise of the generation of the DoctorDonnaWolf," she whispered before disappearing in a swirl of gold. "So it begins."

***

"You're the reason the TARDIS brought us here," the Doctor told Jenny as the six of them entered the TARDIS. "It just got here too soon." He looked at Steve and Martha. "Time to go home?"

"Yeah," Martha replied with a nod. "Home."

***

"Are you sure about this?" Donna asked as they walked down the street.

"Yeah," Martha replied with a nod. "Positive. I can't do this anymore. You'll be the same one day."

"Not me," Donna said with a laugh. "Never. How could I ever go back to normal life after seeing all this? I'm going to travel with those two forever."

Martha smiled. "Good luck."

"And you," Donna replied before heading back to the TARDIS.

***

"You ready for a few adventures?" Jessie asked Jenny.

Jenny looked around before swallowing. "I'm not sure anymore," she admitted softly. "All of that on Messaline, what the General told me . . . I have war in my blood. I'm not sure . . . "

"There is another option," Steve brought up, and Jenny looked up at him. He smiled. "You could come with me."

"You'd do that?" the Doctor asked.

Steve nodded. "SHIELD will take in anyone. I'm sure that when I bring up the two of you, the team will accept her immediately."

"Really?" Jenny asked in excitement.

"I'll keep an eye on her," Steve promised. "It's the least I can do. You showed me what you can do. We can do the same here."

"Thank you so much," Jessie breathed, giving him a hug.

"Anything," Steve replied, hugging her back. "You keep him safe in return, all right?"

"Yes, sir," Jessie replied with a salute before hugging Jenny tightly. "You be a good girl, alright?"

"I will," Jenny told her with a smile.

"You're definitely our daughter," the Doctor told her with a smile. "And we've only just got started. You're going to be great. You're going to be more than great. You're going to be amazing."

Jenny smiled. "Bye, Dad," she told him, giving him a hug as well.

The Doctor kissed the top of her head. "Bye, sweetheart."

Jenny waved at them before she ran to join Steve, and the two of them started walking away, Steve talking to Jenny about SHIELD, the girl brightening as he told her all about it. The Doctor watched them go before both he and Jessie went off after Martha. "You know," Jessie said conversationally, slipping her arm through Martha's. "We're making a habit of this."

"Yeah," Martha agreed with a laugh. "And you'd think it'd get easier. All those things you've been ready to die for. I thought for a moment there, you'd finally found something worth living for."

"What's better? Someone worth living for, or someone worth dying for?" Jessie asked, smiling. "He's got it both."

"I've got her," the Doctor agreed, smiling at Jessie. "And Jenny's here on Earth, with someone who understands what it means to be a soldier. They'll be good for each other."

"Although," Jessie added innocently, "he seemed far too concerned about you after you were gone."

Martha blushed. "Stop it," she told her, giving her a playful swat before hugging her tightly. "Bye, Bad Wolf."

"Goodbye, Doctor Jones," she replied with a smile.

"Bye, Doctor," Martha continued, turning to the man.

"Be a star, Martha Jones," the Doctor told her, hugging her back.

Martha nodded. "I will," she promised before running over to her house.

The Doctor and Jessie returned to the TARDIS, and Donna smiled at them. "Where now?" she asked.

"A break," the Doctor replied, flying the TARDIS into the Vortex. "We need it."

"No kidding," Jessie sighed as she took off her coat and headed back through the halls to the library. Because she was thinking on what her past had said.

The Laws of Time are at stake. Beware the knocking.

What had she meant?

***

Yay, Jenny's not dead! Well, I know she wasn't before, but still, she didn't actually die in the first place! Go First Bad Wolf! But, ooh . . . she knows about what's coming on the Crucible, and what happens at the end of time. Does anybody want to predict the next time we see her? Or what's going to happen during "Journey's End?"

But yes, Jenny is joining SHIELD, I will say that, and she will be among the Children of Time I believe they're called over the subwave network. I can't wait to start that. :)

The interlude will be up shortly, and then this story will officially be on hiatus. It'll be up in a moment!