The idea of Oswin and Clara being twins isn't original. I got that idea from the completely bonkers but fun to read '5 Time Lords, 13 Companions...' Series written by CaitlinJ. In this story they're both completely normal humans from the 21st Century.
Joanna Lumley played the 13th Doctor in the Comic Relief special 'The Curse of Fatal Death', written by Steven Moffat.
While they were waiting for John, The Doctor struck up a conversation, asking Jaime and Alexia all sorts of questions. Going as far as asking what he was like in the future. They couldn't tell him everything, like how he had a Time War in his distant future to look forward too.
One hour, thirty-one minutes and twelve seconds later, John returned from 'taking a leak'. When he saw Jaime he became excited that she had returned safely from Tetrapyriarbus and attempted to hug her. Only she pushed him away when a strong smell of sex wafted off him. He frowned, confused about her actions.
"You must have drank quite a lot in order tae be 'taking a leak' for this long!" Jaime sarcastically uttered.
Alexia snorted, making a mess with her tea, while J.D's face turned red out of embarrassment. Even The Doctor chuckled, yet decided not to comment on the smell coming from his brother. He reckoned his daughter would sort him out in time.
"Anyway, we have tae get goin'." Jaime added, pulling her mother to her feet and grabbing John by the arm. "See you sometime in the future, dad." She said, enjoying his happy smile. Then they disappeared in a blink of an eye.
The three of them reappeared in a metallic or chrome blue style Console Room with different levels. Alexia recognised it as the Eleventh Doctor's second Console Room with the rotating bits at the top. Except there were some differences, like the lighting was another colour when it had previously been blue, and the upper level was fully decorated with bookshelves, a chair, a blackboard and other things. "I recognise this," she said. "We've gone far into the future. This is the Eleventh Doctor's TARDIS."
But Jaime shook her head, recognising the Console Room from a parallel universe. "We've gone further than that," she said. "It's the Twelfth Doctor's TARDIS."
"I still don't like it," John was looking around with a scowl. "Looks too sterile."
Looking rather surprised, Alexia looked over at Jaime. "How do you know it's the Twelfth Doctor?" She asked, but before she was given an answer she heard chat from the lower level. She walked over to the steps and peered over the rail.
"…having said that, I did notice you've got a couple of drive stacks need replacing." The somewhat unfamiliar yet familiar voice said.
"Oh, you did, did you?" A Scottish accented voice replied and Alexia figured this must be The Doctor.
"Who's he talking too?" John asked from beside her and she shrugged her shoulders. She and Jaime had left their Universe long before Series Eight was broadcasted. At this point they were flying blind. Well, maybe herself, she wasn't so sure about Jaime and John.
"Yeah, you should get someone in," the familiar/unfamiliar voice continued. "And a job like that takes forever."
"Really? Well, I suppose, whoever I did get in, it might just be easier to have them stay on board for awhile. I don't suppose you'd know of anyone?" The Doctor hinted and there was quite an obvious lull in conversation as the mystery guest mulled over the invitation.
"No, sorry Doctor, but I don't think I do," the person turned down the invitation. "That job could…er…change a man."
"Yes, it does frequently." The Doctor agreed and the two men began to walk up the stairs.
Only they stopped halfway up when they saw John, Jaime and Alexia stood at the rail, watching them. "More family members, Doctor?" The man wearing the blue overalls questioned and Alexia realised why he sounded so familiar. It was because he looked like Frank Skinner, the radio and TV personality.
"Yes," the Doctor answered. "Only these three are currently travelling along my Timeline." The engineer nodded eagerly, even though he didn't understand, and continued to walk up the stairs with The Doctor.
"Hello tae you too, dad." Jaime spoke up with a smile. "What's this 'bout a mummy on a train?" She asked, having read the engineer…Perkins'…Mind.
"In a bit." The Time Lord answered back and turned to Perkins. "Well, I won't keep you. Goodbye Perkins. Good to meet you." He said to the engineer.
"You too Doctor," Perkins answered back. "And…er…good luck." They shook hands, then Perkins exited the TARDIS.
Once the door closed after him, The Doctor went over to the console and pulled the lever to send the TARDIS into the Vortex. "Right," he turned his attention to his family members from the past, his gaze oddly lingering on Alexia. She didn't notice it but Jaime did and frowned. "First you tell me which me you just came from." He requested. It was an odd question.
"Your Eighth incarnation." John answered. "Does that really matter?"
"Not really," The Doctor replied and stalked around the Console. "Just the last time I saw this version of the three of you was in my Eleventh incarnation. Can't tell you anything though."
An annoyed Alexia sighed as she watched The Doctor and his odd characteristics. Twelve looked like he was perpetually angry.
"Oh, must we?" J.D moaned. "I would rather go back to where we were supposed to be now that we know they survived," he said, referencing The Doctor, Rose and the rest following co-ordinates into the unknown. "All this jumping around is getting a little tedious."
Jaime rolled her eyes at him. "Just be thankful you're not one of those continuous Time Jumpers. Then you'd be really moanin'!" She caught his look of confusion and was annoyed she had to remind him. "Remember that time we past that girl in her Vortex Bubble? She was a Time Jumper." She felt surprise washing off her mum.
"You mean those kind of people actually exist?" Alexia asked, her eyes wide in disbelief.
"Certain Universes, aye." Jaime said.
Alexia shook her head. "I would hate to actually end up that way. I'd rather die than get pulled to and fro."
J.D glanced at her. "A bit drastic much?" He uttered and Alexia shrugged her shoulders.
"I would feel the same way," Jaime spoke up. "At least I get to control where I jump too!"
The Doctor had been patiently listening too and watching them, waiting for them to finish chatting. "Yes, you do actually." He told John. "For obvious reasons."
Though she didn't read his Mind, Jaime understood what he was getting at and nodded.
"As for the mummy," The Doctor continued, walking up the stairs to the upper level for some reason. "We were on the Orient Express, in Space, and there was a mummy killing people in just 66 seconds."
J.D perked up at this when it was mentioned. "The Foretold?" He asked, amazed. "You actually came across it? That is Wizard, brilliant!" He said excitedly.
"Yes, though it turns out he was just an old soldier fitted with dodgy technology."
"Oh!" John let out a mutter of disappointment as they watched The Doctor walking along the upper level.
"Indeed! The real enemy turned out to be Gus, the Orient Express' automated system. Turned homicidal and attempted to kill us all." Obviously they escaped the train, or the Doctor wouldn't be here. "But the real question is…" The Doctor went on as he made his way down the other steps. "…Does any of that sound familiar to you two ladies?" He asked once he reached the bottom and looked at Jaime and Alexia.
The Scots-girl definitely understood what he was asking this time. "If you were askin' if it was an episode, then I have no idea," she replied. "We left our old Universe before we got to see any episodes from series eight."
"Although it could have been, considering that Perkins fella looked a hell of a lot like TV personality Frank Skinner." Alexia added.
"Or simply another case of Spatial Genetic Multiplicity." J.D corrected.
"Or that." Alexia muttered and frowned at the Half-Time Lord.
Jaime remembered the time the Eleventh Doctor received a phone call from somebody about the Orient Express in Space. They never did receive that call! Or maybe they did and it just never got picked up. "What were you doin' on a Space train in the first place?" She asked her dad.
"Och, Rose and I were just there as support. Your sister had a wee spat with her girlfriend. So we suggested they go on a date on the Space version of the Orient Express. Well, it was mostly Rose's idea," the Doctor corrected himself when he sensed a hint of chagrin from his bond-mate. "Said she got the idea from someone she always considered as a mother figure." He grinned when he saw Alexia's face turn a shade of pink, though Jaime felt pride and happiness washing off her mother and smiled slightly.
Then she looked over to the lower entrance when she heard faint laughter and chatter.
Hearing the chatter and laughter, Alexia and John also looked over to where the noise was coming from. It didn't take long for the three females to make an appearance. And it quite surprised Alexia when she saw them. One of the females was Joanna Lumley…or what appeared to be Joanna Lumley. She was young, somewhere between 'Class Act' and the Doctor Who Comic Relief special 'The Curse of Fatal Death'. Her blonde hair was wavy and she wore a cream coloured shirt with a pair of form fitting trousers. The second female, last seen at Amy and Rory's house with her siblings, but looked older. The third female was also familiar with her shoulder length brown hair and brown eyes. It was Freya and Clara but she had no idea who Joanna Lumley-like was. And where on Earth was Rose?
"Oh, hey. Looks like we've got guests." The blonde woman said, even sounding like Joanna in her sophisticated way.
"Yes, they've only just arrived, Rose." The Doctor replied, putting his arm around her waist and giving her a kiss.
Jaime grinned when she felt waves of surprise washing off John and her mum. His awed expression gave her a good chuckle.
"You're Rose?" Alexia exclaimed, staring wide-eyed at Rose Tyler's Second Incarnation. "You can regenerate?"
Rose chuckled. "Of course I can regenerate. I may not be like The Doctor Time Lord-wise, but Bad Wolf gave me the ability to do so."
Expression still awed, J.D took a step towards Rose, giving her a once over, much to The Doctor's annoyance. "So you have two hearts now?" He asked.
Rose shook her head. "No, still got the one." She replied and John's excitement seemed to deflate a little.
Alexia then turned to Freya and her girlfriend. "And you're going out with Clara Oswald?" She asked.
Clara sighed and let out a laugh that sounded more like a huff, while Jaime could feel frustration washing off her, making her furrow her brows thoughtfully. "I'm not Clara," the Clara look-a-like snapped. "I'm Oswin. Clara is my sister." She rolled her eyes and turned away with a pissed off snort.
"Oh, Oswin, she didn't mean it." Freya told her girlfriend, following her. "They're from the past…"
Eyes wide, Alexia was completely surprised at the turn of events. She looked back at her daughter to see if she knew anything but Jaime shook her head, apparently just as surprised.
"Sorry about that, Oswin can get very passive aggressive when people confuse her for her sister." Rose apologised, watching her daughter and girlfriend sitting on the steps, chatting away.
"Oh, no need to apologise," John spoke. "Freya does have a point. We're too far into the future to know anybody." He looked over at Jaime. "I remember you telling me about Clara and how she became 'the impossible girl' when she was split into millions of versions of herself."
Jaime nodded silently. She also remembered bumping into Clara when London was full of trees. Though now she wasn't even sure she had the right person.
"Yes, Jenny said the same thing," the Doctor uttered after listening to his brother. "I told her that jumping into somebody's time-stream wasn't possible and that it would have meant instant death."
A somewhat surprised Alexia looked from her daughter and John to The Doctor and Rose. "Seriously? No running about trying to save all your lives, just dead, like that!"
"Yep!" John answered, popping the 'p'.
"Dead as a Dodo." The Doctor also answered.
Alexia shook her head in disbelief. It was yet another lesson in how this Universe was different from the TV show.
Jaime could feel conflicting emotions coming from her mother and guessed that she was probably thinking the same thing as she was at the time. Once you got used to the differences it was easy to figure out what to do. "So where are you headin' off next?" She inquired, pulling a monitor towards her in order to read the info on it.
"Oh, nowhere special," The Doctor answered, letting go of Rose to check the other monitor. "Oswin wants us to drop her off at her place of work."
Alexia quietly wondered what Oswin's job was. Did she teach children at a school, like Clara in the TV series? She wanted to ask but she didn't want to seem rude, especially when she and Freya were busy chatting to each other.
A couple of minutes later the TARDIS began to make a landing, yet for some reason Jaime felt a flash of danger. It sent her into full alert and she looked around the Console Room with wide eyes as the TARDIS landed with a thud.
Sensing her alert, John looked over at Jaime, his brow furrowed. "Jaime?" He asked, approaching her and put his hands on her shoulders. "What's gotten your attention?"
Jaime turned her head toward him but it felt weird, slow and sluggish. And why did it feel like her energy was dwindling? "Put your shield up." Jaime replied, her eyes still wide.
"What? Why?" He asked, confusion washing off him.
Her eyes drooped in tiredness and then she heard a groan and a thud as somebody collapsed to the floor.
"MUM!" Freya cried out and hurried over to her mother who had collapsed and was now unconscious.
"Rose!" The Doctor was also at her side and attempted to wake her up. "What's wrong?" He asked, pulling out his Sonic Screwdriver in order to scan her.
"What happened?" A worried Alexia asked as she and John watched what was going on, both of them feeling confused.
That left Jaime on her own and she stumbled against the console, just barely managing to hold onto it, her head down. "I dinnae feel so good!" She groaned before collapsing to the floor.
"Oh no, Jaime!" John cried and went to her aid. "What is it? What's wrong with you?" He asked, worrying over her as Alexia joined them. He couldn't understand it because Jaime normally never got ill.
"What's going on?" Alexia asked, sounding very worried. "Why have they both collapsed?"
John shook his head, unsure why or how it was connected.
Jaime looked up at J.D, barely able to keep her eyes open. "Somethin'…is stealin'…energy!" She gasped out before keeling over, barely conscious.
The Doctor had been scanning Rose when he heard what Jaime said, and when he checked the results he found she was correct. "She's right!" He uttered. "Rose is energy deficit."
"Doctor!" Oswin called but was ignored.
"What could have caused this, dad?" Freya asked him.
"Doctor!" Oswin called again.
"Not now, Oswin," the Doctor snapped at her. "I don't know," he answered his daughter. "Could have been anything, but we need to find out what's causing it."
"DOCTOR!" Oswin now shouted and was happy to have caught his and Freya's attention. "The door. It's not supposed to look like that, is it?" She asked, pointing towards the door.
The Doctor stood and walked over to the door and stared at it. He was joined by Freya, John and Alexia. The door in question had somehow shrunk in size.