Disclaimer: Still own nothing.
Sarah was on the verge of laughter. This strange man walked into her living room and had promptly offered her a trip back through time. The idea of time travel wasn't what she found so amusing. Sarah Jane was more than a bit clear on the reality of just how fragile time could be
Her amusement came from the fact that this total stranger had just offered her exactly what her heart desired most—and what's more she hadn't had to tell him. He told her. This strange man in black had sat down on her sofa, told her exactly what she wanted most in the world, and that he could give it to her.
It was just so perfect that all Sarah Jane could do was laugh. She wasn't a stupid person by any means, and her time with the Doctor as well as on her own had given her considerable knowledge about the world she saw every day–as well as the world she didn't. Still despite that rational part of her brain insisting to her that listening to another word would surely be setting out on the path to certain disaster, she kept listening. Because years spent alone tend to take their toll on a person. Sleeping alone night after night because no other man will ever be able to make you happy the way he did.
Sarah Jane listened and found herself more than intrigued by what she was hearing. Could it really be possible? Did this man or alien or whatever he was really know how to take her back there? And even if he could, wasn't there an old saying about being careful what you wished for?
"So, what do you think?" Sarah Jane realized that her companion had finished speaking and was waiting for her to make a reply. "Um...well, what you've sounds...like exactly what I've wanted for ages, but no-one gives something for nothing. What do you get out of this?"
The man's tone was slightly offended. "I can't believe that you'd even ask such a thing. I enjoy helping people get the things they desire out of life, and if it means helping an old friend of mine out in the process, well then all the better I suppose."
"We've never met before." The man laughed. "My dear, I didn't mean you." Now Sarah Jane was confused. He knew the Doctor? Well, she reasoned, the Doctor was just the sort to know...anyone.
She sighed and was silent for a moment. "I'll take that as a yes, then Sarah." Before Sarah Jane could protest the room was filled with a blinding light, and then it was filled with darkness.