They run down the stairs, into the entrance hall with the children ahead with Kathy, the Doctor and Clara bringing up the rear.

Captain Latimer, having heard the commotion as well as footsteps coming down the stairs, enters the hall to get to the bottom of it. "Children, what is the expla—" he then notices the extra guests beside his governess, "who the devil are you? What are you doing in my house?" He splutters.

Uh…

Unfortunately, the Doctor has an answer, "It's okay. We are your governess' gentleman and lady friends, and we've just been upstairs having fun!"

Kathy stares at the Doctor wide eyed. Does he not know how that sounds?! She glances over at Clara who's blushing.

Thankfully Alice the maid interrupts. "Captain Latimer. In the garden, there's snowmen! And they're just growing out of nowhere, all by themselves. Look!" Alice runs to answer the front door.

She's confronted by Vastra and Jenny. The former smiles greetingly and says, "Good evening. I'm a Lizard Woman from the Dawn of Time, and this is my wife."

Kathy tries not to laugh as Alice runs back inside, screaming, and back into—

"This dwelling is under attack. Remain calm, human scum." Strax declares.

Alice screams and faints.

"Oh, dear." Kathy sighs as she walks down the stairs and looks over at the maid. Once seeing the woman is fine, she looks back at her friends. "You lot could have handled that a little more delicately you know."

"Not our fault some cannot handle excitement." Vastra says in humour as she and her wife step into the house, shutting the door behind them tightly.

Kathy rolls her eyes in humour but grins all the same.

"So, any questions?" The Doctor casually asks the shaken Captain Latimer.

The man ignores him and turns to Clara. "You have a gentleman and, uh, lady friends?"

The Doctor shrugs and turns to the situation at hand. "Vastra, what's happening?" He darts over to a window, looking out. Kathy smiles slightly at the sight of him getting back into the swing of it.

"The snow is highly localised, and on this occasion not naturally occurring." Vastra replies.

"It's coming out of that cab parked by the gates." Jenny adds.

"Sir, one pulver grenade would blow these snowmen to smithereens." Strax says.

Kathy groans, rubbing her forehead. "Strax, I've told you! They're already smithereens." She turns to the governess, gesturing to the Silurian, Sontaran and Human. "See, Clara? Our friends again."

"Clara? Who's Clara?" Captain Latimer questions doubtfully.

"Your current governess is in reality a former barmaid called Clara." The Doctor explains.

"That's the way to do it!" They all spin around to see the Ice Governess making its way to the top of the stairs.

"Meanwhile your previous governess is now a living ice sculpture impersonating Mister Punch." The Doctor continues. "Jenny, what have you got?"

Jenny acts fast, throwing a portable force field generator (a little ball-like device that glows red) onto the stairs. The force field comes up, trapping the Ice Governess on the stairs. Though this is only a temporary fix as the energy field can only last so long. "That should hold it."

"Sir, this room. One observational window on the line of attack and one defendable entrance." Strax tells them.

"Right, everyone in there. Now. Move it." The Doctor urges.

Kathy leads Clara, the children, the recently awakened maid (who is a stuttering mess upon waking) and Captain Latimer away from the hall. Jenny escorts the group as well, holding a katana at her side, ready for a fight. Strax is already in the room, prepared to defend against an attack. They place themselves into a small, study room. Captain Latimer immediately starts downing drinks. The Doctor and Vastra arrive shortly after, locking the door securely behind them.

"Strax, how long have we got?" The Doctor questions.

"They're not going to attack. They made no attempt to conceal their arrival. An attack force would never abandon surprise so easily, and they're clearly in a defence formation." Strax reports.

"Way, aye, aye. Well done, Straxie. Still got it, buddy." The Doctor cries gleefully, noogies him and kisses the Sontaran on the top of the head but immediately regrets it as he pulls a face.

"Sir, please do not noogie me during combat prep." Strax complains.

"So, there's something here they want." Vastra realises.

"The ice woman." Clara says.

"Precisely." Kathy says, nodding in return at Clara. "A mix between their ice and human DNA. Replicate that and they'll have an army of ice warriors that don't ever melt."

"Exactly." The Doctor agrees, he walks over and hands Captain Latimer the drink of whiskey. The Captain seems to need it. The Doctor then looks at himself in the mirror, adjusting his bow tie with a grin. "To live here, the snow needs to evolve and she's the blueprint. She's what they need to become." He turns back around towards the group, rambling on, "When the snow melted last night, did the pond?" He snaps his fingers, pointing at Clara.

"No," replies the governess.

"Living ice. It will never melt." The Doctor says grimly.

"And we can't let them get a hold of her." Kathy adds, standing beside him as they both addressed the room. "They'll take over the whole planet if they do."

"And it will be the last day of humanity on this planet." The Doctor concludes.

At that moment, the front door rings. The expression on the Doctor's face darkens. He cracks his neck to the side briefly before turning to the door.

"Stay here." He grabs Kathy's hand and then promptly slams the door behind them, leaving them all in the study room.

No sooner had they left, than Clara steps out of the room.

"Oi, we told you to stay in there." The Doctor admonishes.

"Oh, I didn't listen." Clara shrugs.

Kathy knows now it's too late; she's become attached. "Please Clara, stay in there where it's safe."

"No."

Kathy groans in frustration. "Why don't you listen to me?!" She exclaims.

"It's why you like me." Clara retorts.

Kathy blinks at her. Wait what? "Who said I like you?"

Suddenly, Clara grabs Kathy's face and gives her a long kiss before separating from her. Both are blushing and breathing heavily though the latter is likely because of shock rather than being out of breath.

"I think you just did." Clara says.

Kathy gawps at her. "Right…"

"If you two have finished." The Doctor interrupts causing Kathy to jump as she'd forgotten he was there. He turns and opens the front door, with Kathy and Clara scuttling after him, to reveal Simeon.

"Release her to us. You have five minutes." Simeon turns away and the Doctor closes the door.

"We need to get her out of here but keep her away from them." The Doctor says.

"How?" Clara questions.

The Doctor takes an umbrella from the stand. "With this. Do I always have to state the obvious?"

"Obviously." Kathy remarks with a grin. The Doctor rolls his eyes while Clara giggles.

Captain Latimer has stepped outside the study. "Those creatures outside, what are they?"

"No danger to you, as long as we get that thing out of here," Kathy reassures him. She hates this plan but doesn't know how else to stop the Ice Governess and there's the original Clara they have to think about in the modern day.

The Doctor goes up the stairs and sonics the forcefield.

"What are you doing?" Clara asks as she pushes past Kathy, who tries to stop her as she walks up behind him.

"Between the three of us, I can't wait to find out." The forcefield turns off and then reforms behind them. "Right, Clara, if you look after everyone here, then we can—" he realises then realises Clara is on their side of the force field. "Clara!"

"Doctor." Clara retorts.

They duck under the Governesses' arms as she reaches them, lunging, and run up the stairs.

"That was stupid." The Doctor counters petulantly.

"You were stupid, too." Clara retorts.

"I'm allowed. I'm good at stupid." The Doctor retorts back.

"Glad we've established that cause I've thinking that for ages!" Kathy remarks as she hurries up the stairs in front of them.

"Oi!"

"That's the way to do it!" The Ice Governess mimics.

"Why does she keep saying that?" Clara asks as they all get to the top of the stairs and turn to the creature.

"Random mirroring." Kathy explains. "We need to get on the roof."

"This way!" Clara grabs Kathy's hand, who in turn grabs the Doctor's, and pulls them towards the roof.

"No, I do the hand grabbing. That's my job. That's always me!" The Doctor cries as he gets dragged along.

The Doctor steps through the window leading to the roof. Clara tries climbing through next, but her bustle gets stuck halfway through. Kathy shoves the girl through, in a hurry to follow as the Ice Governess is only a few steps away now. She tries getting herself through the window, though suffers the same fate as Clara.

The Doctor and Clara both reach for Kathy's hands, yanking her through. It ends up flinging Kathy through the window as the two lose their footing on the slippery rooftop. The Doctor and Clara land on their backs with Kathy right on top of them.

"You're going to have to take those clothes off." The Doctor then says. Kathy lets out a gasp of alarm at that and the Doctor realises what his statement had implied. "I didn't mean."

"I know. I understand, I do." Kathy quickly reassures him.

"Good."

"Now, what's the plan?" Clara asks.

The Doctor turns his head to look at her. "Who said I've got a plan?"

"Course you've got a plan. You took that." She points to the umbrella.

"Maybe I'm an idiot." The Doctor says as they all pull themselves up.

"You're not. You're clever. Really clever." Clara corrects.

"I'd argue against that sometimes." Kathy says.

"Are here just to take cheap shots?" The Doctor asks grumpily.

Kathy shrugs. "Someone has to put you down."

The Doctor rolls his eyes and throws Clara the umbrella. "If I've got a plan, what is it? You tell me."

"That's the way to do it!" The Ice Governess reaches the window. Kathy tries to ignore the clenching in her stomach.

"Is this a test?" Clara asks.

"Yes."

"What will it do to us?"

"Hopefully stop that." Kathy says as the Ice Governess turns to snow to get through the window.

"So, come on then. Plan. Do we have one?" The Doctor asks.

"Oh, I know what your plan is. I knew straight away." Clara says, throwing the umbrella back to the Doctor.

"No, you didn't." He chucks it back.

"Course she did." Kathy says, giving Clara a grin and receiving one back.

"Show me." The Doctor demands.

"Why should I?" Clara asks.

"Because we'll be dead in under thirty seconds. Do I have a plan?"

Clara begins pacing around them, thinking aloud, "If we'd been escaping, we'd be climbing down the building. If we'd been hiding, we'd be on the other side of the roof. But no, we're standing right here."

"So?" Kathy smirks.

Clara throws one back. "So!" reaches up with the umbrella and pulls the ladder down. The Ice Governess is reforming on the roof.

"Oh, she's good." The Doctor whispers, grinning at Kathy. "You know how to pick them."

"Do I?" Kathy asks. She's really only been around a couple of the companion meetings so far. She then nods to the ladder. "You first."

"No, after you two." The Doctor counters, waving a hand to the ladder.

"After you." Clara scoffs.

"Remember. Dresses." Kathy says, supporting her and Clara's point by grabbing her skirt and making it bounce.

"Right. Of course." The Doctor mumbles, embarrassed. He starts up the ladder quickly.

Kathy and Clara are just behind him, following along the best they can given what they are wearing.

The Doctor helps them onto the staircase before making the ladder come back up. Just in time as the Ice Governess below is about to grab on.

"So, you can move your cloud? You can control it?" Clara asks as they make their way up the spiralling staircase.

"No. No one can control clouds. That would be silly." The Doctor scoffs. "The wind, a little bit."

Clara keeps up with the questions as she, Kathy and the Doctor continue up the staircase. At one point they hear the Ice Governess coming up the staircase as well. Once they are up on the cloud, the Doctor turns and makes it so it will make the Ice Governess trapped right under the super dense vapour cloud.

"Do you actually live up here on a cloud, in a box?" Clara questions them.

"He does." Kathy corrects. "I just pop up for chats. He mostly stays by himself."

Clara raises an eyebrow at the Doctor. "Blimey, you really know how to sulk, don't you?"

"I'm not sulking." The Doctor argues.

"You live in a box!"

"That's no more a box than you are a governess." The Doctor retorts.

"Oh, spoken like a man." Clara scoffs. "You know, you're the same as all the rest." Clara begins to follow them as they unlock and enter the TARDIS. "Sweet little Clara, works at the Rose And Crown, ideas above her station. Well, for your information, I'm not sweet on the inside, and I'm certainly not—"

The Doctor turns on the TARDIS light, eliminating the alterations and the size of the console room in comparison to the outside.

"—little." Clara finishes, gaping.

"It's called the TARDIS. It can travel anywhere in time and space. And it's mine." The Doctor smugly explains.

"But it's. Look at it, it's…" Clara splutters. Okay, Kathy gets why the Doctor enjoys showing people the TARDIS.

"Go on, say it. Most people do."

Clara runs outside, doing the traditional circuit of the outside. Kathy smiles slightly. The only time she's seen a companion see the inside of the TARDIS for the first time was the original Clara. This thought causes Kathy's smile to drop as Clara re-enters.

"It's smaller on the outside."

The Doctor's smug smile drops. "Okay, that is a first."

"Is it magic? Is it a machine?" Clara questions excitedly.

"She's a spaceship." Kathy explains gently. "She's alive and aware as you and I. Say 'hello'!" The controls blink and the ship hums lightly. Though there was not much of a welcome from the ship, Kathy knows why the TARDIS always feels wary of Clara. It is because of the whole paradox behind the girl and the echoes of the girl that follow. Plus, there had always been a conflict of personality between the two from the very beginning.

"Hello." Clara breathes, waving in awe. The young governess shakes her head, laughing as though she feels like she is losing her mind. "I'm speaking with a machine. The machine's a 'she'." She then looks at Kathy and the Doctor in pure excitement and elation. "Is it always like this with you two?"

"Always." The Doctor says with a grin. Kathy does as well though it drops once the other two are not looking.

"Is there a kitchen?" Clara asks then.

"Another first."

"I don't know why I asked that. It's just, I like making soufflés." Clara remarks as she walks towards the door.

Kathy quickly follows, standing next to her. This Clara can't travel with the Doctor but maybe she can still save her.

Clara's statement causes the Doctor to pause. "Soufflés?"

Clara turns to him as he walks over to them by the doors, staring at him thoughtfully before asking, "Why are you showing me all this? You're nearly a foot taller than I am. You could have reached the ladder without this." She holds up the umbrella. "You didn't take this for Kathy cause you could've just gotten the ladder down for her. You took it for me, to test me. Why?" She tosses him back the umbrella and he catches it with ease.

"I never know why. I only know who." The Doctor holds up a key and then puts it in Clara's hand.

"What's this?" Clara asks.

Suddenly, Kathy feels herself being yanked backwards. Clara and the Doctor cry out. The silver key falls with a clang to the floor as the governess drops it as she lunges towards Kathy, who's being pulled to the still open doorway of the ship. Why didn't Kathy think of closing this? But it's okay cause while this is terrifying, she can survive this, it'll be alright.

Clara and the Doctor run after her. Kathy screams in terror as the Ice Governess snarls and pulls her back to the edge of the cloud.

The Time Lord yanks out his sonic screwdriver, aiming it aggressively at the ice creature. "Let her go. Let her go now! Now!" He shouts.

Clara jumps forward and is able to grab Kathy's hand just as she tumbles backwards off the cloud along with the Ice Governess. Hands connected and Kathy watches in horror as Clara begins to also tumble over the edge and begin to plummet to the ground below, along with Kathy and the Ice Governess.

Kathy's breath is sucked out of her as she impacts the ground. She opens her eyes slowly and sees the TARDIS materialising around her. She blinks away the last of the snowflakes as she stares at the time rotor in a daze.

"Kathy! Kathy!" The Doctor's face appears above her.

"Doctor…. Clara…" She struggles to be able to see where the young girl is.

"Don't worry, I'll get her help but you need to focus on yourself." The Doctor reassures.

Kathy frowns before she realises there's a familiar warmth spreading across her hands. She looks down to see them glowing orange. Ah, this again. She knew this would be survival but would trigger the need to use the regeneration energy. That's why she let herself be bait for the Ice Governess.

"I need to take Clara inside so she gets help. You stay here and take your time." The Doctor says before disappearing.

Since Kathy doesn't actually need to change to survive death, it's more of a healing process. She feels herself coming together, fixing all the broken bones and punctured organs. She feels the energy flow over her as the TARDIS emanates soothing sounds.

Once it's over, Kathy opens her eyes again and hears the TARDIS make a welcoming noise. Kathy groans as she sits up as her body is still tired. She then remembers what happened and begins sobbing.

"Kathy?" She looks up to see the Doctor approaching her sombrely.

"This is all my fault. Sh-she can't die like this. She can't." Kathy sobs.

The Doctor crouches down slowly, placing his hands on Kathy's shoulders. It brings no comfort to her. "You didn't know she'd also go down."

"But I knew she was meant to but I stupidly thought I could stop her falling." Kathy says, sniffling as she stares at the floor.

"She will live, I promise." The Doctor declares, squeezing her shoulders.

Kathy huffs a watery laugh. "Don't make promises you can't keep."

"You've done so much for me, Katherine." His serious tone causes Kathy to look at him. "Let me help. I'll do everything I can." He promises her.

"I need to see her first." Kathy says.

"Of course."

Vastra steps inside the TARDIS where the Doctor stays while Kathy goes to Clara. She had left him to scan the ice fragments that had used to be the Ice Governess.

Clara is lying on a table while Strax uses a device as he stands over her, keeping her alive for a while longer. The TARDIS is parked in the corner of the room. Kathy walks over to the young girl causing Strax to step aside. She can see the sombre looks of Captain Latimer, Jenny, the children and Alice watching on.

Clara weakly opens her eyes and smiles softly at the sight of her. "You're okay."

Kathy smiles tearfully, she reaches out her hand and strokes Clara's face softly. "Of course, I'm okay. You're a little worse for wear however."

"Sorry." Clara apologises.

"Don't be." Kathy insists. "You were trying to save me just like you always do."

"The Doctor says I'm not going to die. But you know the opposite, don't you?" Clara says pointedly despite how weak she is.

Kathy nods, tears threatening to spill. "Yes, I'm sorry, Clara. I should've done more."

Clara shakes her head slightly. "It's not your fault. Though, one thing though, before you go."

"What?"

"Ever since we met, I've had the feeling that you already knew me, you acted so familiar towards me. Why?"

"I have met you. Multiple times in fact." Kathy admits.

"How?"

"In another life."

"Do we save worlds?"

"Yes, we will, and will probably save many more." Kathy replies. "But first, let's save this one." She leans forward and kisses Clara on her forehead before departing from the room.

Kathy goes back inside the TARDIS and catches Vastra and the Doctor mid-conversation as they stand by the console.

"I don't think the universe makes bargains." Vastra tells him.

"It was my fault." The Doctor says.

"No," Kathy interrupts, "it was mine." She walks over to them.

The Doctor shakes his head. "No, I should've realised when you told her to go back into the study. You usually never truly stop them. That should've been a clue."

"Well then." Vastra interrupts. "Better save the world."

Kathy had been thinking on the way over to the institute and as she, the Doctor and Vastra wait for Simeon to arrive. She knows the simplest course of action would be to stop Simeon from being bitten by the memory worm and the Intelligence won't learn to survive beyond physical form but if she does that, it will change too much. It will mean the original Clara and the Doctor don't meet, they then won't be led to Trenzalore by the Intelligence and Clara won't jump and create multiple versions of herself to save the Doctor, leading them here, nor will she be there to help Kathy change the Doctor's mind about destroying Gallifrey. Bar making sure the Doctor doesn't get frozen by Simeon's possessed body, Kathy needs to let it all play out just as it did.

Simeon enters. "You promised us something. Have you brought it?"

"Big fella here's been very quiet while you've been out. Which is only to be expected, considering who he really is. Do you know what this is, big fella?" The Doctor holds up the lunch box.

"I do not understand these markings." The Globe speaks, snow flying around inside and electricity sparking around it.

"A map of the London Underground, 1967. Key strategic weakness in metropolitan living, if you ask me, but then I have never liked a tunnel." The Doctor explains. This almost makes Kathy laugh. She wonders if the Doctor had been intentional with his words, probably not as he doesn't realise his past history with the Intelligence yet.

"Enough of this." The Globe retorts. "We are powerful, but on this planet, we are limited. We need to learn to take human form." The Doctor uses the sonic screwdriver, and the Snowman's voice rises in pitch. "The Governess is our most perfect replication of humanity."

"What's happening to its voice?" Vastra questions.

"He's just stripping away the disguise." Kathy explains.

"No, stop! Stop that. Cease, I command you." The Globe demands, but its words are less impactful now it's accompanied by a child's voice.

"It sounds like a child." Vastra realises.

"Of course, it sounds like a child. It is a child. Simeon as a child. The snow has no voice without him." The Doctor explains. Simeon leans on his desk, shaken.

"Don't listen to him, he's ruining everything." The Globe declares.

"How long has the Intelligence been talking to you, Simeon? Since you were a boy building snowmen?" Kathy questions knowingly.

"Yes. He was my snowman. He spoke to me." Simeon replies shakily.

"But the snow doesn't talk, does it?" The Doctor retorts. "It's just a mirror. It just reflects back everything we think and feel and fear. You poured your darkest dreams into a snowman and look, look what it became."

"I don't understand." Vastra speaks.

"It's a parasite feeding on the loneliness of a child and the sickness of an old man." Kathy explains.

"We can go on and do everything we planned." The Globe insists.

"Oh yes, and what a plan. A world full of living ice people. Oh, dear me, how very Victorian of you." The Doctor sarcastically replies.

Simeon pulls himself together at those words. "What's wrong with Victorian values?" He says and grabs the lunch box, opening it.

"Ah, ah, ah. Are you sure?"

"I have always been sure." The memory worm in the box bites him, causing him to convulse and collapse. Kathy watches on sorrowfully, thinking of all that lost potential as well as a life about to be lost.

"Good. I'm glad you think so," the Doctor crouches, talking to the unmoving Simeon, "since your entire adult life is about to be erased. No parasite without a host. Without you, it will have no voice. Without the governess, it will have no form."

Kathy slowly backs away, knowing she needs to keep away so Simeon won't knock her down when he's animated. She reaches for what seems to be some sort of cane and grabs it, ready.

"What, what, what's happening? What's happening? What did you do?" The Globe panics.

"You've got nothing left to mirror any more. Goodbye."

"What did you, did you…" the snow suddenly fills the Globe and its voice deepens again. "Did you really think it would be so easy?"

"That's not possible. How is that possible? Kathy?" The Doctor turns to her.

Kathy shakes her head apologetically. "I'm sorry. It had to happen. Too many important things won't happen if I had stopped you."

"But you were just Doctor Simeon. You're not real. He dreamed you. How can you still exist?"

"Now the dream outlives the dreamer and can never die. Once I was the puppet," Simeon is reanimated as an icy ghoul, "now I pull the strings! I tried so long to take on human form. By erasing Simeon, you made space for me. I fill him now." It speaks from Simeon's body.

"Hint, don't let him touch you!" Kathy cries.

Vastra draws her sword but Simeon knocks her aside with unexpected, for Vastra and the Doctor anyway, strength but, before it can grab the Doctor, Kathy raises the cane and whacks Simeon on the back of his head. This startles the Intelligence and Simeon's body staggers.

"You think that will stop me." The Intelligence cries. "I am more than snow, more than Simeon. Even this old body is strong in my control. Winter is coming!"

Kathy smirks. "Oh, I know, but even alien snow gets washed away."

It's at that moment that the Globe full of snow suddenly becomes full of water. Simeon's body cries in shock before collapsing and seizing on the ground.

"Doctor, the Globe. It's turning to rain. All of it, the snow, look." Vastra observes as Simeon's body becomes still.

Kathy crouches over Simeon's body. "He's dead." She says sombrely.

"What happened?" Vastra asks as she pulls herself up.

"The snow mirrors, that's all it does. It's mirroring something else now. Something so strong, it's drowning everything else." The Doctor realises. He opens a window and holds out his hand. "There was a critical mass of snow at the house. If, if something happened there…"

The Doctor and Vastra both taste the rain.

"It's salty. Saltwater rain." Vastra observers.

"Exactly," Kathy says remorsefully, "because it's tears, not rain. A family is crying on Christmas Eve. That can drown out any snow."

The TARDIS materialises in the study. Kathy, the Doctor and Vastra step out to find everyone else weeping or standing silently around Clara as she lies on the table, breathing shallowly.

"I'm sorry." Strax says. "There was nothing to be done. She has moments only."

The Doctor and Kathy walk over to Clara, crouching beside her. The girl watches them through lidded eyes.

"We saved the world, Clara," Kathy says softly, "you, me and the Doctor. I told you we would."

"Are you going back to your cloud, Doctor?" Clara asks quietly.

The Doctor shakes his head. "No more cloud. Not now."

"Why not?" She then closes her eyes, unable to hold them open any longer.

"It rained." The Doctor then bows his head mournfully but Kathy watches on, waiting.

"Run. Run, you clever boy." Clara opens her eyes as she finishes speaking. "Remember. And keep her safe." The clock chimes midnight as Clara dies.

Kathy stares at Clara with tearful eyes as everyone begins to weep around her. Again, those words, that alteration in the statement.

"It's Christmas. Christmas Day." Jenny murmurs.

Captain Latimer is with his children by the graveside while Kathy, the Doctor, Vastra and Jenny stand back.

"And what about the Intelligence? Melted with the snow?" Vastra questions.

Kathy shakes her head, her eyes still red from the tears. While the Clara she knows is still alive, she had gotten to know this version and is still hurt by her death. "No. It learned to survive beyond physical form."

"Well, we can't be in much danger from a disembodied Intelligence that thinks it can invade the world with snowmen." Jenny remarks.

"Or that the London Underground is a key strategic weakness." Vastra adds. The statement lifts a smile from Kathy.

The Doctor takes out Simeon's business card, frowning at it. "The Great Intelligence. Rings a bell. The Great Intelligence." He walks forward to the grave as the family leave with the rest of them following.

The gravestone has already been carved and put in place. Clara Oswin Oswald. Remember me, we shall meet again. Born November 23, 1866, died December 24, 1892.

Kathy watches closely as the Doctor takes in Clara's full name as he crouches by the grave, knowing what this will trigger.

"I never knew her name. Her full name. Soufflé girl. Oswin. It was her. It was soufflé girl again." He says to himself before leaping up and facing Kathy, Vastra and Jenny. "I never saw her face the first time with the Daleks, but her voice, it was the same voice."

"Doctor?" Jenny asks.

"The same woman, twice. And she died both times. The same woman! Kathy, do I find her?"

Kathy looks away from the gravestone to the Doctor with a tired, sad smile. "Spoilers, but I do recall you recruiting a younger me to help."

He beams. "Ah ha! Brilliant!"

"Doctor, please, what are you talking about?" Vastra questions.

"Something's going on. Something impossible, something." He says gleefully. "Right, you three, stay here. Stay right here. Don't move an inch." He backs away before running off.

"Are you coming back?" Vastra calls after him.

"Shouldn't think so!"

"But where's he going?" Vastra questions.

Kathy shrugs, smirking at the two. "What do you think? To find her. To find Clara."

A/N: Poor Kathy. She was really hoping to save this Clara, but she still hasn't learnt not everything can be changed, no matter what she hopes. While she is old and mature, she's still naive when it comes to events from DW episodes. She does have small successes (Spider in Thin Ice) but is not always successful with the bigger ones as they have a greater effect on the timelines. Spoiler for you there.