Disclaimer: I do not own Doctor Who. This is just for fun.
"No, no no!" The Doctor remarked, from where he was fiddling with the connections at the console. "Clara! Clara, I said to reattach the temporal junction, not the quantum loop circuit!"
"I know what I'm doing, Chin-boy!" Clara called from under the floor. "I used to fix these, thank you very much." She thumped on the floor above her head. "Now keep the tertiary circuit steady while I feed the temporal junction back through the binary return circuit!"
The Doctor grumbled as he took hold of the lever that controlled the tertiary circuit system as Clara did whatever she was doing to his TARDIS. "You know, I think this is why the Old Girl doesn't like you!" He was glad to have his Clara back, and while he was usually glad to have someone around who understood him so well, he was accustomed to being the only person who understood the TARDIS, and now the impossible girl knew enough to argue with his (obviously superior) repairs. Of course, the rewards for actually going along with it all were often worth it…
Lost in thought, his hand may have slipped slightly, and the circuit suddenly fizzed and sparked as it shifted and Clara let out a yelp from under the floor. "Clara!" The Doctor said in concern. "Are you all right?"
"Yeah." Clara said from under the floor. "One of the temporal stabilisers is burnt out and all the thrusters on that grid are misaligned though."
The Doctor would have replied, if not for an unexpected third voice. "This is why I didn't want to stay behind. Something always happens when we split up from The Doctor!"
The Doctor blinked several times and crept along the console, looking around a corner to see a teenage boy wiping off his trousers.
"Don't be ridiculous, Storm." Another voice answered, as an equally teenaged girl popped up, face spattered with grease. "We didn't do anything!"
"Who are you?" The Doctor sputtered at the pair. "How did you get on my TARDIS? The door's locked!"
The girl turned to look at him, seemingly noticing him for the first time. "This….is not good."
The boy was picking his bag from the console floor when an irritated Clara popped her head up over the floor, mere inches from his nose. "What the bloody hell did you do, Miri…"
"Nothing!" The girl replied, cutting him off. "This is not my fault!"
"Oh, it's always you're fault." The boy responded, taking a step back.
"Says The Dark Lord." She replied, her voice heavy with sarcasm.
"Okay, wait, sorry, who are you?" Clara asked, confused.
The boy held his hand out to her. "Alfie Owens, but everyone calls me Storm."
"Ickle Stormageddon?" The Doctor said, face exploding into a grin. "Look at you! But you should barely be a toddler. And whose you're friend?"
"I'm Miri." The girl said, holding her hand out to The Doctor. "We travel with you, Clara, Craig, and Sophie…but you're older then, I think."
"The two TARDISes must have fused together somehow, vaulting you into this control room." The Doctor said, considering this. "Not the first time something like this has happened. Actually, for once it's not a full on paradox."
Clara shook her head, climbing into the control room and pushing the offending lever. "I told you to keep ahold of the lever." She smiled conspiratorially at the teenagers. "This is why I'm the boss."
"No, no you're not!" The Doctor argued.
"Yes she is." The two teenagers replied in unison, as if in response to an old argument.
