Ok, this is possibly my best idea ever! I was watching an episode of Doctor Who (Journey's End repeat), and I was thinking, if Rose could cross the dimentions once, she could do it again, but this time completely by accident! I don't think this would be classed as a crossover, because there is only one character from Doctor Who, who is no longer in it.

This chapter is mainly a prologue, so don't let it mislead you, keep reading, it's just to help it make a bit more sense. I DO NOT OWN ANY OF THE CHARACTERS OR THE SARAH JANE ADVENTURES!

"Rani! He's headed towards the top floor!", Clyde's voice echoed through her mobile phone.

"On it!", Rani reassured him, changing her direction and heading to the stairwell. They were chasing a Sontaran through a block of council flats. Not what a normal seventeen year old girl does on Saturday mornings, but Rani loved it. Taking the stairs two or three at a time, even though these could be her last steps, she wouldn't have changed it for the world. It sounded cheesy even in her head, but it was the truth. She flashed past Sarah Jane, who was keeping tabs on the Sontaran, all the way up to the top floor. Sarah Jane remarked to herself how fast her young crew was; she must be getting old. Nah, she thought as she too bounded up the stairs, still plenty of life yet!

Rani stood, panting, on the top of the flats, keeping a wary eye on the Sontaran. She had never met one before now, but had heard plenty about them on the way over. Like how they had a probic vent on the back of their neck, and if she could hit that just right, the Sontaran warrior could be rendered unconscious. As she looked around for anything she could use, Clyde and Sarah Jane burst through the door behind her. Loudly.

The Sontaran wheeled around, no longer exposing the only weakness.

"Ha!", he shouted, "Did you really think you could catch me? Me, an imfamous warrior of Sontar? You humans are pathetic, and I will wipe out all of the miserable little species! Sontar-Ha! Sontar-Ha!". He punched his fist against his other, open hand, in the war gesture of the Sontarans.

"Well, for a miserable little species, we defend this earth!", Sarah Jane stated proudly, "We've defeated you more that once, so why not this time?"

"Because I have a stratagem like no other! The Infoilable Sontaran Strategem, updated version! And nothing can stop me!"

Clyde decided he should probably say something; it was unlike him to remain silent for so long, "But everyone we've fought has always said that, and they've always been defeated by us, the 'pathetic' kids and the time traveller from Ealing, crushed 'em flat!"

Sarah Jane, Rani and the Sontaran, it seemed, looked a little taken aback by Clyde's mini-speech. Sarah Jane looked especially surprised, Rani looked at Clyde with a hint of admiration, and the Sontaran had recovered from his shock, and was now laughing.

"Such a cute speech, half-form!", he gloated through his laughter, "But the Sontarans are invincible!". His laughter died, and he suddenly looked serious, "But you have defeated my kind before, not you…", he pointed to Rani, who looked offended.

Clyde butted in for her, "Oi! She's just as good as us!", causing Rani to blush a little, despite the bitter wind at the top of the flats.

Clyde was a little surprised, he hadn't expected Rani to blush. Smile at him maybe, that was just one of the things he loved about Rani, her smile, but blushing? Had he been mis-reading the signs? Could there ever be more than just friendship between them…?

He was brought back to reality by the Sontaran's harsh bark of a laugh.

"You're all just as terrible as eachother!"

"Oh yeah?", Sarah Jane was getting angry now. "If we're all as bad as eachother, couldn't the same be said for all species, from all planets?"

"Of course not! We Sontarans are all just as good as eachother. We always win!"

"Ah, but you don't always win, that's the thing! You think you're so indestructible, with all your stratagems, which you say can't fail! But they can, and they do! And that's your other weakness, not just the probic vent on the back of your ugly neck! You don't always win! You lose, we win!", Sarah Jane had really worked herself up, and was sounding just like the Doctor when he was off on a rant.

Rani and Clyde exchanged looks. It was very unlike Sarah Jane to show this side of her; she hadn't done it very often. Only when she was feeling particularly protective of her planet. Which she was now.

Cutting in, Rani spoke up, "But what's the point of all of this? Why do you want to wipe out the humans?"

"Because any species that have defeated us before must be venged upon! You defeated out race, and now you must pay! In blood!" The Sonatarn was also getting very worked up.

"No!", Sarah Jane took everyone by surprise, "No! I'm saying no, no, no, no, no! You can't have this planet, you can't wipe out the humans, you don't win, and you wanna know why? Because you think you're so clever, with your plans and schemes, but you're just a bunch of clones, bred for killing. No moral, no nothing, just kill, kill, kill! You don't realise what someone may have up their sleeve!", Sarah Jane was bluffing, she didn't have a secret weapon. She was on her own, with Just Rani and Clyde, and a faint blue light in the distance…

The Sontaran was fuming, so he didn't notice the light, but Sarah Jane, and only Sarah Jane did. She didn't know what it was, but she carried on talking, trying to distract the Sontaran for long enough to let Rani or Clyde think up some kind of plan.

"Yeah, someone you least expect could just knock you out!"

No sooner had she finished speaking, than the Sontaran fell forwards, flat on his face, to reveal Clyde, looking extremely pleased with himself, and holding a DSlite.

He spoke to Rani, "I told your dad this would come in handy one day!"

They all laughed uneasily. Only then had they realised they had also been shaking, and not from the cold.

"Well, shall we just…", she pointed to the stairwell, and after disposing of the Sontaran, using his own weapons (They had no choice), they departed the flats.

On the journey home, many topics were discussed, including the Doctor, Sarah Jane's speech, the Sontaran, and Clyde's take-down with nothing but a gaming device. They had mixed feelings about the whole event, fright at the Sontaran himself, self-disgust at having to kill him, and elation about the fact that they had survived, triumphed again. Clyde was also thinking about Rani, her hair had come loose during the initial chase, and on top of the windy block of council flats, it had caught the wind beautifully. The reason, in fact, that he had not spoken much sooner during the incident was because he had been studying every inch of her face.

Rani was also thinking of Clyde, at his brilliance of knocking out a completely armoured Sontaran with nothing but a DSlite and his own quick-thinking. If only he put that thinking into school, her dad might be more approving of him, and that would make it a whole lot easier.

They exited the car, Sarah Jane thinking vaguely about the blue light she had seen, it would have happened somewhere around here…

They clattered up the stairs to the attic, talking loudly, but that talk, and laughter was cut off abruptly as they saw a stranger, a young blonde woman stranger, sitting on the swivel chair, spinning around. She stood up as soon as she saw them. The tension was so thick it could be cut with a knife, and then she smiled.

"Hey, Sarah Jane! I was wonderin' who all this alien tech belonged to!" Rose exclaimed, waving a 'hello'.