A/N: Man, it's hard to come up with good chapter titles. But somehow, I managed it! Welcome back to our next chapter.

This one is based upon the Doctor Who episode 'The Poison Sky'.

I do not own Doctor Who. All I own is this story and my OC. Please review and no flaming will be tolerated.

Cheers :)


THE SERPENT HIDES ITS VENOM

"I'm gonna fight 'em off.
A seven-nation army couldn't hold me back.
They're gonna rip it off.
Takin' their time right behind my back.
And I'm talkin' to myself at night.
Because I can't forget.
Back and forth through my mind.
Behind a cigarette."
– The White Stripes: 'Seven Nation Army' (Elephant [2003]).


Outside the Nobles' home

The world is choking to death from a toxic gas that is leaking out of hundreds of car exhaust pipes. The Doctor is underneath the Nobles' car, struggling desperately with the ATMOS. The Heart was still trying, in vain, to get Wilf out of the car in any way possible. But, to her frustration, nothing the Time Couple did seemed to be working.

"He's going to choke!" Donna shouted, frantically watching her grandfather through the fogged-up car windows, slumped up against the steering wheel.

"It won't open!" the Heart realises. Just then Sylvia comes back out of the house with an axe, causing the Heart and Donna to back up in a hurry, until they see her closing the car's bonnet and breaks the windscreen with the blunt side of the axe. They stare at her, stunned.

"Well, don't just stand there. Get him out." Sylvia snaps at them, reminding Donna and the Heart that Wilf was still in trouble and immediately climbed up onto the bonnet and reached into the car to pull him out. The Doctor hops out from underneath the car and assists.

"I can't believe you've got an axe." Donna blinks at her mother in disbelief. But Sylvia merely shrugs.

"Burglars."

"Get inside the house," the Doctor instructs Sylvia and Wilf. "Just try and close off the doors and windows." Jenkins drives up in a black cab, sticking his head out the window, he flags down the Doctor.

"Doctor! This is all I could find that hasn't got ATMOS." The soldier reports in and both the Doctor and the Heart immediately run towards the cab and hop in.

"Donna, you coming?" The Doctor looked at her, expectantly. The redhead nodded.

"Yeah," She goes to follow the Time Couple but Sylvia grabs her arm to stop her.

"Donna, don't go." Donna looks back at her mother, hesitating. "Look what happens every time that Doctor appears. Stay with us, please." But Wilf steps between them and shoves Donna towards the cab.

"You go, my darling!" Wilf urges.

"Dad!" Sylvia looked at him, aghast.

"Don't listen to her. You go with the Doctor." Donna gets into the cab. "That's my girl!" The cab drives off as Donna and the Heart look out the cab window and smile and wave back at Wilf.


Industrial estate

The Doctor fiddles with the cab radio, listening in to news about the poisonous fog plaguing London and the rest of the world.

"The Government has declared a state of emergency. People are being told to stay away from all cars with ATMOS devices attached…" He twists the dial to a different station. "… The gas appears to be toxic. We are warning anyone and everyone, stay away from the cars. Repeat, stay away from your cars." Jenkins steers the car back towards the ATMOS factory.

"Ross, look after yourself. Get inside the building." The Doctor immediately instructs him and the soldier nodded immediately and everyone gets out of the cab, coughing harshly in the toxic gas.

"Will do." He pulls out his walkie-talkie and contacts UNIT. "Greyhound Forty to Trap One." Jenkins reports in. "I have just returned the Doctor and the Heart to base safe and sound. Over!" He jogs away, back inside the building. The Doctor, the Heart and Donna head in the direction of the Tardis.

"The air is disgusting…" Donna croaked.

"We'll survive. It's nothing we can't handle…" the Heart reassures Donna, gesturing between herself and the Doctor.

"Go on, get inside the Tardis." He and the Heart go to return to UNIT's Mobile Headquarters, before the Doctor remembers something important. "Oh, I've never given you a key." The Doctor produces a Tardis Yale Key from his pocket and presents it Donna with a smile. "Keep that. Go on, that's yours." Donna takes the key from him, still coughing heavily. "Quite a big moment really."

"Not the right time, love." The Heart reminded him and Donna nodded in agreement.

"Yeah, maybe we can get sentimental after the world's finished choking to death." She reminded him and the Doctor nodded, gravely.

"Good idea." He and the Heart jog off back towards the entrance of the alleyway.

"Where are you going?" Donna asks.

"To stop a war." The Doctor responded with a grin, before seizing the Heart's hand and both of them run towards the ATMOS factory, while Donna uses her new Tardis key and lets herself inside.


Mobile HQ

The Time Couple discover UNIT soldiers running about wearing gas masks, while Colonel Mace gives them instructions. They run up to him.

"Right then, here we are. Good." The Doctor gives Mace a stern look. "Whatever you do, Colonel Mace, do not engage the Sontarans in battle. There is nothing they like better than a war. Just leave them to us."

"And what are you going to do?" Mace looks sceptical.

"Use the Tardis to get on board their ship." The Heart confirms with a smile. The Heart then goes over to the Doctor who had stopped Martha. It was time to get to bottom of this mess and they needed their former companion in order to do this, since Donna was now safely ensconced inside the Tardis for her own safety.

"Come on." The Doctor gravely instructs Martha, who nodded instantly and falls into step between the Time Couple towards the alleyway. Except when they get there, the Tardis had disappeared.

"But where's the Tardis?" Martha questioned, looking worried. But the Heart, for some reason, senses triumph coming from Martha. She studies the young doctor with suspicion.

"Sweetie, there's something odd about Martha. I got a sense of triumph from her when she realised that the Tardis was gone. It's like, she'd already anticipated this…" The Heart used their native telepathic link to relay this to the Doctor, who looks over at her and nodded, his face sober.

"I know. It's not like her at all." The Doctor eyes the Martha impostor critically, who remained oblivious to their observations. "Play along for the moment," He decides. "We'll get to the bottom of what she is up to…" The Heart nodded as the Doctor returns to the situation at hand and takes a sample of the air around him, ignoring the obvious toxic gas that was already in the air. He makes a revolted face.

"Taste that, in the air. Yuck!"

"It's like some sort of metal tang…" the Heart remarked after also taking a sample. Her eyes widen when she drew a conclusion. "Teleport exchange! It's the Sontarans. They've taken it."

"Aw, you mean, we're stuck on Earth like, like ordinary people. Like humans. How rubbish is that?" The Doctor whines and the Heart just gives him an unimpressed look.

"Considering I lived for nearly 22 years as a human, I take offence at that, and I'm sure Martha would agree too." The Heart admonished. "It's really not as bad as you think, love."

"I'm sorry, no offence, but come on…" the Doctor sighed heavily and headed back towards the truck. The Heart and Martha fall into step behind him.

"So what do we do?" 'Martha' questioned.

"Well, I mean, it's shielded." He referred to the Tardis's automatic cloaking device that activates the moment she lands. "They could never detect it."

"What?" 'Martha' looked confused.

"Martha, have you phoned your family and Tom?" the Heart distracts her from the Tardis and falls back on the younger woman's familial obligations. It was a test she was conducting to confirm if this really was 'Martha' or something impersonating her. 'Martha' gives her a strange look.

"No. What for?" She responded. 'Because it's the first thing I would've done if the world was in trouble…' the Heart privately thought, saddened that 'she' had failed the test. Martha's family meant everything to her; proven by how desperate she had been when the Master had taken over to contact her family to warn them. To have a lackadaisical attitude towards this, was very sloppy on this impostor's part if they wanted to fool everyone.

"The gas," the Doctor prompted; also looking a bit shocked at her careless attitude. "Tell them to stay inside." He explained and 'Martha' seemed to remember herself and nodded promptly.

"'Course I will, yeah but, what about Donna? I mean, where's she?" She baited, and the Doctor was quick to respond. He plastered on a 'fake' smile.

"Oh, she's gone home. She's not like you. She's not a soldier." He confirmed, breezily. "Right. So. Avanti." They continue on their way to the truck.


Mobile HQ

The Doctor and the Heart come running into the room, with 'Martha' following calmly behind them.

"Change of plan." The Doctor announces to Mace who looks up at the trio and smiles approvingly at them.

"Good to have you fighting alongside us, Doctor." Mace misinterprets, and the Doctor frowns at him.

"We're not fighting. We're not-fighting, as in not hyphen fighting, got it?" He clarifies firmly, much to Mace's frustration. "Now, does anyone know what this gas is yet?"

"We're working on it." 'Martha' pipes up from beside the Heart.

"It's harmful, but not lethal until it reaches eight percent density," A nearby female officer chimes in. "We're having the first reports of deaths from the centre of Tokyo City."

"And who are you?" the Doctor zeroes in on the woman, who immediately gets to her feet to greet the Doctor.

"Captain Marion Price, sir." She salutes him and the Doctor recoils away in annoyance.

"Oh, put your hand down. Don't salute." He grumbles. Price looks a little taken aback by the Doctor's reaction to the salute but nevertheless nodded and sinks back down into her seat and resumes working. The Heart rolls her eyes as she comes over to stand next to the Doctor and mouths 'sorry' to Price who smiles politely but returns to work.

"Jodrell Bank's traced a signal, Doctor, coming from five thousand miles above the Earth. We're guessing that's what triggered the cars." Mace deduced and the Doctor nodded.

"The Sontaran ship."

"NATO has gone to Defcon One. We're preparing a strike." And both the Doctor and the Heart objected.

"You can't do that. Nuclear missiles won't even scratch the surface." The Heart stated.

"Let me talk to the Sontarans." The Doctor insisted, but Mace just glowers at him.

"You're not authorised to speak on behalf of the Earth." He argues, but the Doctor stares him down defiantly.

"I've got that authority. I earned that a long time ago." The Doctor pulls rank before sticking his sonic screwdriver into the communications system. "Calling the Sontaran Command Ship. Under jurisdiction two of the Intergalactic Rules of Engagement." He telephones in. "This is the Doctor." The image of General Staal comes into view on a giant screen, startling Mace and the rest of UNIT.

"Doctor, breathing your last?" Staal taunted.

"My God, they're like trolls!" Mace comments out loud without thinking, and both the Doctor and the Heart glare at him for his lack of tact.

"Nice one, mate." The Heart chides him. "Maybe you need to work on your diplomacy skills?" The Doctor returns his attention back onto Staal.

"So, tell me, General Staal, since when did you lot become cowards?" the Doctor asks, casually.

"How dare you!" Staal yelled indignantly and the Heart groans at the Doctor's hypocrisy, as Mace returns an incredulous look at the both of them.

"Oh, and that's diplomacy?" He retorts and the Heart just gives Mace a look best reserved for parents scolding their children.

"Oh, grow up will you?" She snapped, before focusing back on the screen.

"Doctor, you impugn my honour." Staal complains, and the Doctor just looks bored.

"Yeah, I'm really glad you didn't say belittle, because then I'd have a field day. But poison gas? That's the weapon of a coward and you know it." The Doctor points out. "Staal, you could blast this planet out of the sky, and yet you're sitting up above it watching it die. Where's the fight in that?"

"A general would be unwise to reveal his strategy to the opposing forces," Staal stated. The Doctor suddenly grinned, realising something.

"Ah, the war's not going so well, then. Losing, are we?" the Doctor guesses and Staal looked appalled by such a question.

"Such a suggestion is impossible." Staal insists, but the Doctor looks more than convinced that his theory was true.

"What war?" Mace looked confused. The Heart steps forward to explain.

"The war between the Sontarans and the Rutans." This explanation draws Staal's attention towards her.

"Your associate is correct." Staal confirms, and the Heart aims a sarcastic smile at him before continuing her explanation to both Mace and 'Martha'.

"It's been raging, far out in the stars, for fifty thousand years." She turns and frowns quizzically at Staal, walking over to stand beside the Doctor, who had taken a seat at Mace's desk and propped his feet up. "Fifty thousand years of bloodshed, and for what?"

"For victory! Sontar-ha. Sontar-ha. Sontar-ha. Sontar-ha. Sontar-ha. Sontar-ha…"

"Oh, for pity's sake…" the Heart groaned and folded her arms across her chest as the Doctor rolled his eyes and changes the channel with his sonic, which reveals a cartoon. Mace looks disapproving.

"Doctor. Heart. I would seriously recommend that this dialogue is handled by official Earth representation…" He insists, but backs down by a sharp, no-nonsense look from the Heart as the Doctor changes the channel back to the conversation with Staal.

"Finished?" the Doctor mocked Staal, dryly.

"You both will not be so quick to ridicule when you'll see our prize." The camera pivots around to give them a view of the Tardis. "Behold. We are the first Sontarans in history to capture a Tardis." Staal brags, but neither the Doctor nor the Heart were in the slightest bit concerned.

"Well, as far as prizes go, that's noble." The Doctor hints, knowing that somehow Donna was listening in. "As they say in Latin, Donna nobis pacem." The Heart grinned. "Did you never wonder about its design? It's a phone box. It contains a phone. A telephonic device for communication. Sort of symbolic. Like, if only we could communicate, you and I." He looked pointedly at the screen, making the 'phone' signal with his hand.

"All you've communicated is your distress, Doctor." Staal misinterprets the Doctor's words.

"Perhaps," The Heart retorted. "But I must say, it was a big mistake though. Huge. Showing us the Tardis." She pulls her own sonic from her pocket and holds it up. "Because the Doctor and I have our own set of remote controls." The Heart threatens.

"Cease transmission!" Staal's face vanishes from the screen.

"Ah, well…" the Doctor shrugged and gets to his feet. Meanwhile, Mace was practically seething at them.

"That achieved nothing." He remarked, and the Heart gives him a flat look.

"Oh, ye of little faith," She quotes.


Nobles' Home

Meanwhile, Wilf and Sylvia were following the instructions the Doctor had given them before he, Donna and the Heart left to go back to the ATMOS factory. Wilf was using liquid nails to seal himself and his daughter inside to prevent the poisonous gas from seeping into the house, while Sylvia was flipping through the channels for an update on what was happening around the world.

"The United Nations has issued a directive worldwide, telling urban populations to stay indoors. Those in rural areas are being ordered to stay away from all major cities. There are reports from every country in Europe of thousands of people walking across country to escape. And on the Eastern seaboard of America it's said to be reminiscent of Dunkirk, with boats taking refugees out into the Atlantic…" News 24 reports. A despairing Sylvia flips to a different channel. But the information given, is roughly the same.

"With the freeways blocked by ATMOS cars, populations of major cities are now walking across open country to escape the fumes. It is being likened to a Biblical plague. Some are calling this the End of Days." The family phone suddenly starts ringing, making Sylvia jump before scrambling to answer it.

"Mum, you all right?" Donna's voice answers and Sylvia sags with relief that her daughter was alright wherever she was. Speaking of…

"Donna. Where are you, sweetheart?" Sylvia asks her, urgently. Wilf looks over from where he was reaching up to the tops of the window frame, sealing them in with the liquid nails. He perks up the moment he hears Donna's name.

"Is that her?" He asks hopefully.

"Oh, just finish the job." Sylvia snaps at her father before explaining their situation to Donna. "Your granddad's sealing us in. He's sealing the windows. Our own house, and we're sealed in. All those things they said about pollution and ozone and carbon, they're really happening aren't they?" She fretted, and Donna immediately attempted to soothe her mother's frazzled thoughts.

"There's people working on it, Mum. They're going to fix it, I promise." She reassures Sylvia. Naturally, her mother bites back with a sarcastic remark.

"Oh, like you'd know. You're so clever." And Donna rolled her eyes, used to her mother's put downs.

"Oh, don't start. Please don't." Donna pleads, and Sylvia sags with regret.

"I'm sorry. I wish you were here." Her voice quivers a little, and Wilf puts down the liquid nails and comes over to his daughter's side.

"Now, come on, Sylvia. Look, that doesn't help." He scolds her, gently. Wilf takes the phone from Sylvia and puts it to his own ear. "Donna, where are you?"

"It's sort of hard to say." Donna responded hesitantly, looking around the interior of the Tardis. "You all right?" She questions him, and Wilf gives a weak smile despite how worried he was about his granddaughter.

"Yeah. Fighting fit, yeah. Are they with you, the Doctor and the Heart?" Wilf asks, sounding hopeful. Sylvia scoffs behind him.

"Oh, those two…" She grouses. Both Wilf and Donna ignore her complaints.

"No. I'm all on my own." Donna stated, still wondering what purpose the Time Couple needed of her involving the phone. She had also been listening into the conversation between the Doctor, the Heart and General Staal. Wilf frowns slightly.

"Look, you promised they were going to look after you…" He fretted a little, and Donna was quick to reassure him.

"They will, Gramps. There's something they need me to do." Donna explained. "I just don't know what." Wilf relaxes a little, then relays some information about what was going on around the world to her.

"Well, I mean, the whole place is covered. The whole of London, they're saying. The whole, the whole world. It's the scale of it, Donna." He paused, sounding a little doubtful despite his hero worshiping of the Time Couple the last time he had seen them. "I mean, how can they stop all that?"

"Trust me. They can do it." Donna was confident.

"Yeah, well, if they don't, you tell them that they'll have to answer to me." Wilf stated firmly.

"I will. Just as soon as I see them, I'll tell them." Donna promises. She hangs up, and Wilf's worries skyrocketed.

"Huh." He puts the phone down. Sylvia looks out the window at the smog-filled street.


Mobile HQ

Back at UNIT headquarters based outside the ATMOS factory, everyone, including the Time Couple are frantically trying to figure out how to fight back against the Sontaran's scheme. 'Martha' pulls up her clipboard to scan the results of a test they had been conducting, and the Time Couple look over her shoulders at it.

"There's carbon monoxide, hydrocarbons, nitrogen oxides, but ten percent unidentified. It's some sort of artificial heavy element we can't trace." She glances up at the couple. "Any of you ever seen anything like it?" Neither the Doctor nor the Heart have.

"It must be something the Sontarans invented." The Heart suggests.

"This isn't just poison. They need this gas for something else. What could that be?" the Doctor ponders, as both he and his tether look calculatingly at an oblivious 'Martha' who was still flicking through the results. Now that they knew that 'Martha' wasn't their former companion, just something masquerading as her, they were confident that 'Martha' knew exactly what was planned.

"Launch grid online and active." Price calls out, making the Doctor and the Heart jerk their heads towards her in alarm.

"Positions, ladies and gentlemen. Defcon One initiatives in progress." Mace gives his orders.

"What? I told you not to launch!" the Doctor objected angrily.

"The gas is at sixty percent density. Eight percent and people start dying, Doctor. We've got no choice." Mace countered his argument.

"There's always a choice. Usually that doesn't result in unnecessary death!" the Heart insists, but both she and the Doctor are ignored.

"Launching in sixty, fifty-nine, fifty-eight, fifty-seven, fifty-six. Worldwide nuclear grid now coordinating. Fifty-four, fifty-three…" Price counts down the launch, and the Doctor turns on Mace.

"You're making a mistake, Colonel. For once, I hope the Sontarans are ahead of you." The Doctor stated before falling back and standing next to the Heart who studies the screen morosely.

"North America, online. United Kingdom, online. France, online. India, online. Pakistan, online. China, online. North Korea, online. All systems locked and coordinated." Price confirmed. "Launching in ten, nine, eight, seven, six, five…"

"God save us," Mace mutters. Out the corner of her eye, the Heart spots 'Martha' pulling something from her pocket. She nudges the Doctor, who looks over questioningly, and she gestures towards 'Martha'.

"Four, three, two, one." Price finishes the countdown, and the Time Couple watch as 'Martha' taps something on her device. "Zero." Predictably, nothing happens. The world map on screen goes blank. The Time Couple exchange relieved but intrigued looks between them as they watch 'Martha' surreptitiously hide the device, before pretending to look just as 'bewildered' as everyone else.

"What is it? What happened? Did we launch?" Mace blathers in confusion. No one responded. "Well, did we?" He requested, sternly.

"Negative, sir. The launch codes have been wiped, sir." Price confirms. "It must be the Sontarans."

"Yeah, it must be…" the Heart mutters underneath her breath at the Doctor who smirks a little, now that both of them had figured out how the Sontarans aborted the attack.

"Can we override it?" Mace asks.

"Trying it now, sir." Price acknowledges. The Doctor steps forward.

"Missiles wouldn't even dent that ship, so why are the Sontarans so keen to stop you?" the Doctor pondered.

"Any ideas?" the Heart innocently asks 'Martha', who looks back at her in bewilderment.

"How should I know?" 'Martha' responded, defensively.

"Greyhound Forty declaring Absolute emergency. Sontarans within factory grounds. East corridor, grid six." Jenkins's voice rings out of hidden speakers. Mace's eyes widen in alarm, while the Doctor and the Heart seethe angrily.

"Absolute emergency. Declaring Code Red. All troops, Code Red." Mace sounds the alarm.

"Get them out of there," the Doctor urges firmly. But he is ignored.

"All troops, open fire." Mace orders.

"Why does nobody listen?!" the Heart rages as the sounds of gunfire come over the sound system. A few seconds later, Jenkins's panicked voice comes back over the line.

"Guns aren't working. Inform all troops, standard weapons do not work. Tell the Doctor it's that cordolaine signal. He's the only one who can stop them—" Jenkins is cut off abruptly, causing the Heart to whimper in despair.

"No!" She turns away, and the Doctor is furious.

"Greyhound Forty, report. Over. Greyhound Forty, report. Greyhound Forty, report!" Mace barks down his microphone towards a very obviously dead Jenkins. The Doctor looks up at Mace, a look of fury on his face.

"He wasn't Greyhound Forty. His name was Ross." The Doctor's voice was low, slow and deliberate. An indication that he was barely holding back his anger. "Now listen to me and GET THEM OUT OF THERE!" He bellows. Mace swallows hard before raising his wrist microphone back up his mouth.

"Trap One to all stations. Retreat. Order imperative. Immediate retreat." He glances back at the Doctor. "They've taken the factory."

"Why?" Both men look over at the Heart who had tear tracks down her face but was looking fierce and determined. "They don't need it. Why attack now? What are they up to?" She pondered in confusion and the Doctor shakes his head in frustration.

"Times like this, I could do with the Brigadier. No offence." He tagged on that last part to Mace who shrugged.

"None taken. Sir Alistair's a fine man, if not the best. Unfortunately, he's stranded in Peru." He informs the Doctor, who once again groans in frustration.

"Launch grid back online." Price informs and the Heart glances back over at 'Martha' who once again taps something on her device. The grid on screen goes blank again. "They're inside the system, sir. It's coming from within UNIT itself." Price is mystified.

"Trace it. Find out where it's coming from, and quickly." Mace orders. "Gas levels?"

"Sixty six percent in major population areas and rising." Price relays, sounding nervous. The Doctor walks over to the Heart and grabs her hand, leading her towards Mace's office to regroup with the UNIT leader.

"Why are they defending the factory only after we were inside?" Mace was confused.

"Because they wanted UNIT here. You gave them something they needed," The Doctor explained. "Something now hidden inside the factory. Something precious."

"We've got to recover it. This cordolaine signal thing, how does it work?" Mace asked.

"It's the bullets," the Heart explains. "It causes expansion of the copper shell." Mace brightens up, looking triumphantly at the couple.

"Excellent. I'm on it." He goes to give out the orders, but the Heart reaches out and grabs him by the arm, pulling him to a stop and glowering at him.

"For the billionth time, the Doctor and I have told you, you can't fight Sontarans." She lets him go and she and the Doctor walk away from the Colonel and go outside the office.

"Phone. I need a phone." The Doctor mutters to himself, and the Heart blinks and nearly kicks herself for her forgetfulness. She pulls out Katy Tyler's phone from her bigger-on-the-inside pockets.

"Doctor…" She offers the phone to him and he blinks down at it in astonishment before beaming and planting a hard, brief, but affectionate kiss on his tether's lips before dialling Martha's phone. The Heart smiles lovingly at him, before turning and cautiously observing 'Martha' as the Doctor returns to the office to make his phone call. He stands nearby the doorway, as the phone call connects.

"What happened?" the Heart suddenly hears Donna's worried voice greet the Doctor. "Where are you?"

"The Heart and I are still on Earth. But don't worry, we've got our secret weapon." The Doctor grinned.

"What's that?"

"You." The Doctor stated, succinctly. The Heart could practically picture Donna sagging in on herself, looking uncomfortable.

"Oh. Somehow that's not making me happy. Can't you just zap us down to Earth with that remote thing?" Donna complains, causing the Heart to frown unhappily at the fact that Donna was underestimating herself once again. She goes over and gestures for the Doctor to hold the phone between them so she could join in their conversation.

"You really gotta believe in yourself a bit more, Donna." She scolds the redhead. "When you put your mind to it, you can accomplish anything." The Doctor gives her a 'what the hell' look, just as Donna's slightly amused voice responded back to her.

"You did not just quote Back to the Future at me." Donna complained, and the Heart immediately dismisses the comment.

"Yes, I did. But it doesn't make it any less true."

"Besides, we haven't really got remotes, even though I really should." The Doctor added, looking just as amused as Donna did and smiles at the Heart who shrugged nonchalantly. "We need you on that ship. That's why I made them move the Tardis. And I'm sorry, but you've got to go outside." The Doctor stated apologetically.

"But there's Sonteruns out there…" Donna panics.

"Sontarans," the Doctor corrects her automatically. "But they'll all be on battle stations right now. They don't exactly walk about having coffee."

"We'll talk you through it," The Heart promises.

"But what if they find me?"

"I know, and I wouldn't ask, but there's nothing else we can do." The Doctor couldn't be any more apologetic and desperate. "The whole planet is choking, Donna."

"What do you need me to do?" Donna asked, bravely.

"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." The Doctor instructed hastily.

"But I can't even mend a fuse…" Donna instantly pointed out and the Heart lets out a small growl, mentally reminding herself to smack Sylvia upside the head when this was all over.

"Oi! What did I just tell you earlier, Donna?" She admonished, and the Doctor grunts in agreement.

"Heart's right, Donna. Stop talking about yourself like that. You can do this." The Doctor encourages her. "We promise." The Time Couple paused for a moment as they hear Donna walking slowly along the Tardis's metal gangplanks towards the double doors. Cautiously, the redhead opens one of them and peeks out.

"There's a Sonterun. Sontaran." Donna informs them, frantically.

"Did he see you?" the Heart questioned.

"No, he's got his back to me." Donna confirmed, and the Time Couple sag with relief. The Doctor takes over momentarily.

"Right, Donna, listen. On the back of his neck, on his collar there's a sort of plug, like a hole. The Probic vent," He explains. "One blow to the Probic vent knocks them out."

"But he's going to kill me." Donna whimpers.

"We're so sorry, sweetheart. We swear we are, but you've got to try." The Heart reassures and encourages Donna. There is silence for a few minutes before the Doctor and the Heart hear the Sontaran grunt in pain, before falling heavily to the floor.

"Back of the neck!" Donna confirms, triumphantly.

"Good one, Donna!" the Heart praises her, happily. The Doctor smiles too but moves on with his instructions.

"Now then, you got to find the external junction feed to the teleport." He tells her.

"What, what's it look like?" Donna sounded confused, and the Heart didn't blame her. Sometimes the Doctor opted for long-winded scientific names than simplifying it.

"A circular panel on the wall, is your best bet." The Heart clarifies. "Big symbol on the front, like a, like a, uh…"

"Letter T with a horizontal line through it. Or, or two Fs back-to-back." The Doctor supplies helpfully.

"Oh. Well, there's a door." Donna stated.

"Should be a switch by the side." The Heart instructed.

"Yeah, there is. But it's Sontaran shaped, you need three fingers." Donna pointed out.

"You've got three fingers, Donna." The Heart stated, flatly.

"Oh, yeah…" The Time Couple waited patiently. "I'm through!" Donna confirmed and the Time Couple silently cheer in triumph.

"Oh, you are brilliant, you are!" the Doctor cooed at Donna, happily.

"Shut up." Donna deflects their praise instinctively, making the Time Couple frown a little. "Right. T with a line through it…" Then the Heart spots Mace headed towards them and urgently tugs on the Doctor's arm before turning and facing Mace. The Doctor's eyes widen.

"Got to go. Keep the line open!" the Doctor requested urgently before facing Mace with a stony expression on his face. Mace didn't look much better, and in fact looked at the Time Couple with a defiance.

"Counterattack." Mace declared firmly.

"We already told you; you don't stand a chance." The Heart growls at him, but Mace remained stubborn.

"Positions!" He announces out loud, then looks sternly at the couple. "That means everyone." Mace tosses them a gas mask each. 'Martha' hurries towards them with a determination.

"You're not going without me." She protested, but the Heart easily links arms with 'Martha' and leads the three of them outside as the Doctor responded casually.

"Wouldn't dream of it."


Industrial estate

The air outside is saturated with pea-soup-like smog, which forces everyone to wear gas masks. Mace holds up a large gun for the Doctor's perusal as the Time Couple look down at it in disdain.

"Latest firing stock." Mace describes the weapon. "What do you think?" He asks the couple who exchange looks with each other before saying in unison:

"Are you my mummy?" Both falling back on their terrifying adventures with gas masked zombies under the control of hysterical 4-year-old Jamie, who had been searching for his mother, Nancy, during the latter part of the London Blitz. Mace fixes them with an unamused glare.

"If you two could concentrate. Bullets with a rad-steel coating. No copper surface. Should overcome the cordolaine signal," Mace explains.

"But the Sontarans have got lasers. You can't even see in this fog. The night vision doesn't work." The Doctor tells them, and it appeared that Mace was getting fed up with the Doctor's constant objections.

"Thank you, Doctor. Thank you for your lack of faith. But this time, I'm not listening." Mace snapped, churlishly.

"Yeah, we noticed." The Heart retorted back as Mace removes his gas mask.

"Attention, all troops!" Mace raises his voice like a bullhorn so he could be heard. "The Sontarans might think of us as primitive, as does every passing species with an axe to grind. They make a mockery of our weapons, our soldiers, our ideals. But no more. From this point on, it stops. From this point on, the people of Earth fight back, and we show them. We show the warriors of Sontar what this human race can do." Mace declares and the Heart suddenly feels uncomfortable.

"Are you getting Harriet Jones vibes right now?" She whispers to the Doctor who nodded wordlessly.

"Trap One to Hawk Major. Go, go, go." Mace bellows into his wrist microphone and all of a sudden there is a massive downdraft, which blows the gas away. "It's working. The area's clearing. Engines to maximum." Mace instructs as the Time Couple look up to see what had blown the smog away.

"It's the Valiant." The Doctor realises and the Heart immediately pales, as the sight of the carrier ship brings back painful memories. The Doctor reaches out and takes the Heart's hand, stroking the back of it with his thumb, gently. Mace looks over at the Doctor triumphantly.

"UNIT Carrier Ship Valiant reporting for duty, Doctor. With engines strong enough to clear away the fog." Everyone is able to remove their gas masks.

"Woah, that's brilliant." The Doctor deadpans. Mace misses the negative tones in the Doctor's voice.

"Getting a taste for it, Doctor?"

"No, not at all. Not me or the Heart." He stated firmly. Mace's smile dropped, but he nevertheless continues with his plan.

"Valiant, fire at will." He orders as six green beams from the Valiant converge to form one that hits the ATMOS factory. Meanwhile, UNIT soldiers use rocket launchers to blast away the loading bay doors.


ATMOS factory

The Doctor, the Heart, 'Martha' and Mace make their way into the factory. Mace then turns towards the Doctor and informs him.

"East and north secure. Doctor?" He questions the Doctor for their next move, but the Time Lord ignores him, more focused on getting to Donna and getting her out of harm's way.

"Donna, hold on. I'm coming…" He mutters out loud as he and the Heart head off on their own. 'Martha' jogs up to them as the Doctor whips out his sonic and starts scanning the area with it.

"Shouldn't we follow the Colonel?" 'Martha' asks him, looking confused. However, the Time Couple paste on fake smile and gesture for 'Martha' to follow them.

"Nah, don't be silly. It's just gonna be the three of us, Martha Jones. Just like old times." The Doctor chirps. 'Martha' looks at him suspiciously but then turns away and once again taps on something on her phone, naively assuming that the Doctor and the Heart were still ignorant that she was the one responsible for stopping the missiles UNIT was still trying to launch at the Sontaran spaceship.

"Let's go hunt down some alien technology!" the Heart stated, falsely enthusiastic. The Doctor's sonic picks up on a signal and heads down a nearby corridor. The fluorescent lights overhead automatically switch on.

"This way!" The Doctor stated, leading them to a doorway blocked by plastic strip curtains. "No Sontarans down here. They can't resist a battle. Here we go." He easily slips inside the room, followed closely by the Heart. 'Martha' hesitates but reluctantly follows them.


Clone Laboratory

The Doctor and the Heart wrinkle their noses at the foul smell that greets them the moment they stepped into the room. The Heart's eyes widen in horror when she spots somebody familiar lying unconscious on a medical gurney.

"Martha!" She sprints over to the unconscious young doctor and assesses her to make sure she was still alright. "Still alive." The Heart tells the Doctor, who sags with relief.

"Oh, Martha. I'm so sorry…" He lamented. The Time Couple hear the sound of a gun being cocked and looked back to see the Martha impostor aiming a gun at the Doctor's head.

"Is that supposed to frighten us?" the Heart sneers at her.

"Wish you carried a gun now?" the Martha impostor gloated and the Doctor rolled his eyes as he and the Heart continued to find a way of disconnecting the real Martha from the machine she was hooked up to.

"Not at all." He responded, stiffly.

"I've been stopping the nuclear launch all this time…" the Martha impostor brags and the Heart gives her a hard look.

"Yes, we know." She confirms, earning a look of surprise from the impostor. "What do you want, a medal?"

"Besides, you've been doing exactly what I wanted." The Doctor acknowledges. "I needed to stop the missiles, just as much as the Sontarans. I'm not having Earth start an interstellar war." He straightens up and faces the impostor dead on. "You're a triple agent."

"When did you know?" The impostor narrowed her eyes at them, cautiously.

"About you? Oh, right from the start." The Doctor stated, flippantly.

"I knew the moment I sensed your triumph when the Tardis went missing from the alleyway." The Heart explained, earning a surprised look from the impostor. "Why do you think they call me 'the Heart'?" She smirked.

"Plus, the reduced iris contraction, slight thinning of the hair follicles on the left temple." The Doctor added and once again wrinkled his nose at an unpleasant smell. "And, frankly, you smell."

"Add it all up it all spells, 'duh'. You might as well have worn a T-shirt saying 'clone' written on it." The Heart stated.

"Although, maybe not in front of Captain Jack. You remember him, don't you? Because you've got all her memories. That's why the Sontarans had to protect her, to keep you inside UNIT." The Doctor positioned himself at Martha's head, placing a hand on the device that was attached to the female doctor's head. "Martha Jones is keeping you alive." He pulls the device off, and the clone jerks in pain and buckles at the knees as she clutches at her chest. The Doctor instantly kicks away her gun.

"I've got you; I've got you." The Heart was soothing a frightened Martha who was looking around frantically.

"There was this thing, this alien, with this head…" Martha babbles fearfully. Katy's phone rings and the Heart plucks it from her pocket and looks at caller ID.

"Donna." She informs the Doctor, who groans in frustration. "Go ahead, I'll help Martha." The Doctor nodded and took the phone, promptly answering it.

"Got it?" He asks Donna.

"Yes. Now hurry up." Donna whispered urgently.

"Take off the covering. All the blue switches inside. Flick them up like a fuse box, and that should get the teleport working." The Doctor hastily instructs Donna. Martha sits up with the assistance of the Heart and spots her clone slumped up against some nearby scaffolding, struggling to take in breath.

"Oh, my God. That's me." She blurted out, looking horrified. The Heart helps Martha off the gurney and shrugged off her Royal Blue duster, putting it around Martha's shoulders.

"Yep, it's you." The Heart confirmed, distractedly. "Are you okay?" She asks Martha, concerned.

"Yeah, I'm fine. Go help the Doctor." Martha waves off the Heart who nodded immediately and goes over to where the Doctor was busy working on the teleport while still on the phone with Donna. Martha cautiously approaches her clone who immediately cringes away from her.

"Don't touch me." The clone snapped weakly. Martha looks at her with sympathy.

"It's not my fault. The Sontarans created you, but you had all my memories." She reminds the clone who hesitates when she sifts through her borrowed memories.

"You've got a brother, sister, mother and father…"

"If you don't help me, they're going to die." Martha reminds her. The clone blinks up at her.

"You love them."

"Yes. Remember that?" Martha encourages the clone. The Doctor pipes up from over near the teleport.

"The gas. Tell us about the gas." He requested, bluntly. The clone glares at the Time Couple in resentment.

"They're the enemy." She complains, but Martha complies with the Doctor's request and gently attempts to convince the clone to fess up.

"Then tell me." She coaxes. "It's not just poison, what's it for?" The clone hesitates, frustrating Martha. "Martha, please!" The clone hesitates for a second more, before giving in, knowing that she didn't have long to live.

"Caesofine concentrate." She eventually reveals. "It's one part of Bosteen, two parts Probic five."

"Clonefeed. It's clonefeed!" the Doctor yells out triumphantly. Martha frowns in confusion.

"What's clonefeed?"

"Like amniotic fluid for Sontarans," the Heart explains. "That's why they're not invading. They're converting the atmosphere, changing the planet into a clone world. Earth becomes a great big hatchery."

"Because the Sontarans are clones, that's how they reproduce. Give them a planet this big, they'll create billions of new soldiers. The gas isn't poison, it's food." The Doctor realises. The clone winces in pain; her eyes widening in fear.

"My heart. It's getting slower…" She realises.

"There's nothing I can do," Martha stated, a little helpless. The Heart comes over to investigate and pauses when she senses sadness and sympathy from Martha, and hopelessness and regret from the clone. The clone looks up at Martha with tearful eyes.

"In your mind, you've got so many plans. There's so much that you want to do." The clone stated, and Martha smiles sadly at her.

"And I will," She promises confidently. "Never do tomorrow what you can do today, my mum says. Because…"

"… Because you never know how long you've got." The clone winces, remembering. "Martha Jones. All that life…" She dies, and the Heart lowers her head, sadly. Martha slowly reaches over and retrieves her engagement ring, sliding it on her finger. She stands up, a little shakily because of the machine she had been artificially sleeping under, and the Heart comes over to assist.

"You okay?" the Heart asks quietly, and Martha shakes her head.

"No, but I will be." Martha confesses as she walks over to the teleport, where the Doctor was still repairing it.

"Doctor. Blue switches done," Donna reports. "But they've found me…" She states in horror.

"Now!" the Doctor shouts and zaps the teleport with his sonic. Donna reappears in front of them, looking relieved. She hangs up the phone in her hand.

"Have I ever told you how much I hate you?" Donna questioned the Doctor, engulfing him into a relieved hug. However, the Doctor immediately shrugs her off.

"Hold on, hold on. Get off me, get off me." He pushes Donna off to one side and uses the sonic on the teleport again. "Got to bring the Tardis down." The Doctor then goes into the teleport, followed immediately by the Heart. "Right, now. Martha, you coming?" He asks her, hurriedly. Martha nodded and got into the teleport with them.

"What about this nuclear launch thing?" She asks, holding up the device.

"Just keep pressing N," the Heart instructs her. "We want to keep those missiles on the ground." Donna was looking over at the Martha clone corpse still slumped against the scaffolding.

"There's two of them." She stated, looking appalled as she glances back and forth between the real Martha and the clone one.

"Yeah, long story." The Doctor winced. "Here we go. The old team, back together." Then amends what he says almost immediately. "Well, the new team." Donna joins the Doctor, the Heart, and Martha in the teleport.

"We're not going back on that ship!" Donna immediately protests.

"No, no, no." the Doctor reassures her. "No. I needed to get the teleport working so that we could get to—"


Rattigan Academy

"—Here. The Rattigan Academy, owned by…" The Doctor trails off when he sees Rattigan pointing a gun at the four of them, looking desperate.

"Don't tell anyone what I did. It wasn't my fault, the Sontarans lied to me, they—" the Doctor cuts him off by relieving the teenager of his gun and tossing it away.

"If I see one more gun…" He growls underneath his breath as he walks passed a stunned Rattigan. The Heart, Donna, and Martha; still wearing the Heart's duster, step from the teleport and follow him. Donna appraises Martha in the Heart's jacket.

"You know, that coat looks good on you." She complements Martha before looking apologetically at the Heart. "No offence." But the Heart waves off the comment, smiling brightly at both women.

"Nah, don't worry about it." She says, good naturedly.


Academy laboratory

The Doctor wastes no time the moment he sets foot in the laboratory, grabbing the Heart to assist him as they both construct a complicated looking gizmo.

"That's why the Sontarans had to stop the missiles. They were holding back." The Doctor realises. "Because caesofine gas is volatile, that's why they had to use you to stop the nuclear attack. Ground to air engagement could spark off the whole thing."

"What, like set fire to the atmosphere?" Martha questioned.

"Yeah. They need the gas to help with their breeding program." The Heart confirmed, as the Doctor looked at Rattigan shrewdly.

"And all this time, we had Luke here in his dream factory. Planning a little trip, were we?" He asks the teenager, who glowers back at him petulantly.

"They promised me a new world."

"You were building equipment," the Doctor corrects him. "Ready to terraform El Mondo Luko so that humans could live there and breathe the air with this." He presents to Donna, Martha and Rattigan the gadget he and the Heart were compiling together quickly. "An atmospheric converter." It looked like a sawn-off chimney flue attached to an electric heater system. The Doctor immediately scoops up the atmospheric converter and races outside with it, followed by the Heart, Donna, Martha and Rattigan.


Rattigan Academy grounds

You could barely see London through the thick poisonous smog off in the distance, as the five of them stand together in the field in front of the school. The Doctor and the Heart immediately set up the converter as Donna, Martha and Rattigan look at the city in horror.

"That's London," Donna exclaimed. "You can't even see it. My family's in there." The Heart finishes helping the Doctor and comes over to comfort the visibly distraught Donna, who was new to all of this.

"Don't worry, Donna. It'll all be fixed in a moment." The Heart promises.

"If I can get this on the right setting…" the Doctor added, distractedly as he fiddled around with the gadget. Martha frowns when she realises what the Time Couple were planning on doing.

"Doctor, hold on. You said the atmosphere would ignite." She pointed out, and the Doctor nodded in confirmation.

"Yeah, I did, didn't I?" He activates the atmospheric converter, and an energy pulse zooms up into the grungy clouds. It goes off with an almighty KaBOOM! The Doctor crosses his fingers as the fireball spreads in the upper atmosphere, and the Heart breaks away from Donna to come over to his side and takes his hand as she watches the fire spread like a shield, with trepidation.

"Please, please, please, please, please, please, please…" the Doctor mumbled underneath his breath, pleadingly.

"Please work!" the Heart muttered also. The flames race around the world, consuming the gas without damaging any buildings, and leaving a clear blue sky behind. Mankind come out of their houses to celebrate, and Captain Price kisses a flustered Colonel Mace.

"He's a genius!" Rattigan marvelled, impressed.

"Just brilliant." Martha grinned happily at another job well done by the Time Couple. However, neither notice that the Time Couple weren't celebrating. In fact, both of them were frantically gathering up the atmospheric converter and hi-tailing it back inside.

"We're in for it now." The Heart explains, hastily. Donna, Martha and Rattigan follow them, looking confused.


Recreation Area

The Doctor and the Heart carry the atmospheric converter towards the teleport and set it down inside the machine. The Doctor stands beside the controls, and immediately turns back to the Heart, Donna, Martha and Rattigan; the last three looking at him in bewilderment.

"Right. So. Donna," the Doctor looked pointedly at the redhead. "Thank you for everything." He turns to a concerned Martha. "Martha, you too. Oh, so many times." He beams at her. Martha returns the smile, feeling uneasy. The Doctor then turns towards Rattigan who looks at him questioningly. "Luke, do something clever with your life." Rattigan sulks and turns away, just as the Heart prepares to follow the Doctor into the teleport also. However, the Doctor stops her. "No, darling. Not this time." He tells his tether, solemnly.

"What?" the Heart blinks at him, taken aback.

"You're saying goodbye." Donna realises in dismay. The Heart's eyes widen.

"No…" She protested, but the Doctor remains firm as he explains his choice, still wearing that solemn expression on his face.

"Sontarans are never defeated. They'll be getting ready for war. And, well, you know, I've recalibrated this for Sontaran air, so…"

"You're going to ignite them." Martha stated, looking disapproving.

"You'll kill yourself." Donna points out.

"Don't martyr yourself, you stupid fool!" the Heart growls at him.

"Yeah, just send that thing up on its own." Martha agrees with her friend. "I don't know. Put it on a delay."

"I can't," the Doctor looked grave.

"Why not?" Donna protested as the Doctor reaches over and picks up the remote that kickstarted the converter and gives the Heart one last glance. She glares at him, tearfully.

"I've got to give them a choice." He insists before he teleports away. The Heart dives at him, just missing him by inches as she crashes to the floor.

"NO! Doctor!"


Sontaran Spaceship

The Doctor materialises on the Sontaran Spaceship, holding the remote threateningly in his hand as General Staal greets him with a nasty sneer.

"Oh, excellent."

"General Staal, you know what this is." The Doctor indicates towards the Atmospheric converter. "But there's one more option. You can go. Just leave. Sontaran High Command need never know what happened here." He bargains, but Staal merely laughs at the idea.

"Your stratagem would be wise if Sontarans feared death, but we do not." Staal turns towards the others. "At arms!"

"I'll do it, Staal." The Doctor wasn't kidding around this time. "If it saves the Earth, I'll do it."

"A warrior doesn't talk, he acts." Staal pointed out.

"I am giving you the chance to leave," The Doctor reasons compassionately.

"And miss the glory of this moment?" Staal scoffs at him. One of the Sontarans looks back at Staal.

"All weapons targeting Earth, sir. Firing in twenty." He reports in and Staal grinned triumphantly.

"I'm warning you…" the Doctor scowls.

"And I salute you." Staal turns towards his men. "Take aim." The Sontarans obey and the Doctor barely flinches but gives Staal his final ultimatum.

"Shoot me, I'm still going to press this." The Doctor stated. "You'll die, Staal."

"Knowing that you die too." Staal agrees, gleefully.

"Firing in fifteen…" the countdown to the destruction of Earth begins. Staal stands at the helm, ready to witness.

"For the glory of Sontar," Staal toasted. The Doctor is dismayed, realising that he needed to call Staal's bluff in order to protect the 8 billion people living on the planet below them. Which also included his beloved Heart. "Sontar-ha. Sontar-ha. Sontar-ha." All the Sontarans on board began chanting their war cry.

"I'll do it!" the Doctor threatened one last time. Staal turns and smirks at him challengingly.

"Then do it!" The Sontarans continue chanting as the countdown continues. However, at the very last second, shocking the Doctor, he vanishes, and Rattigan reappears in his place. He catches the converter control, and his presence stuns the Sontarans, who very clearly were not expecting this particular move. Rattigan smirked triumphantly at the Sontarans.

"Sontar-HA!" And Rattigan slams his hand down on the button. The Sontaran spaceship instantly implodes, taking out the just launched clone pods along with it.


Recreation Area

The Doctor drops into the Academy teleport, breathless. He glances around in confusion.

"What the—" He is cut off when something warm and with a familiar comforting scent suddenly barrels into him, threatening to cut off his air supply with a very tight bear hug. "Heart?" Tears splash onto his neck as she buries her face into it.

"Never. Do. That. Again!" The Heart over-enunciates at him, in both anger and relief that he was alive and unharmed. He smiles tenderly and pulls her into his lap as he reciprocates the hug. The Doctor glances up when Martha rushes over and sits beside him, hugging his arm to her chest as she smiles up at him with relief. Donna, on the other hand, slowly approaches the Doctor, also tearful, and rears back and thumps him on the arm in her annoyance, before taking a seat on the Doctor's other side and joining in the group hug.


Tardis

A few hours later, the Doctor drops Donna off at her house for a brief visit with her mother and Wilf to check to see if they were okay after their frightening ordeal with ATMOS. True to form, Sylvia was apparently back to her old self, and Wilf promised Donna that he wouldn't tell her mother that she was still going to be traveling with the Doctor and the Heart, despite all the danger they had gone through.

"How were they?" Martha asks, smiling brightly at the redhead as she walked inside the Tardis. The young doctor had stopped by the Tardis for a visit to reflect upon their adventure and to say hello to the Tardis once more. Donna shrugged nonchalantly.

"Oh, same old stuff." She responded. "They're fine. So, you going to come with us?" Both the Doctor and the Heart looked up expectantly at Martha, each looking a little hopeful that Martha might considering travelling with them again. But at the same time, not holding their breaths. "We're not exactly short of space." Donna gestured around the interior of the Tardis. But Martha shakes her head.

"Oh, I have missed this, but you know. I'm good here, back at home." She pushes off the console that she had been leaning against while deep in conversation with the Time Couple and starts heading towards the double doors. "And I'm better for having been away." Martha turns and walks backwards so she could still see the Time Couple and Donna one last time before leaving. "Besides, someone needs me. Never mind the universe, I've got a great big world of my own now." She waves goodbye and was about to push open the door and step out, when the door slams shut on its own and the time rotor activates, throwing everyone around like ragdolls.

"What? What?" The Doctor blurts out in disbelief.

"What are you doing?" The Heart speaks directly to the Tardis herself, who doesn't respond.

"Doctor, don't you dare!" Martha scowls at him. But the Doctor immediately protests his innocence.

"No, no, no. I didn't touch anything. We're in flight. It's not me!" He insists.

"Where are we going?" Donna exclaimed in alarm.

"I don't know. It's out of control!" the Doctor was bewildered. But Martha was more concerned about getting back home.

"Doctor, just listen to me. You take me home. Take me home right now!" She demanded.


A/N: Looks like Martha's sticking around for one last adventure. Stay tuned for the next chapter update. Until then. TTFN :)