This takes place way before 221B Baker Street, possibly when Sherlock was a teen.

I don't own Sherlock

Sherlock POV

Around town, I'm fairly well known for my particular ability to solve mysteries. But in London, not many people know me, so it's harder to get a case. Why was I in London, you may ask. I had to take 'a break', as Mother put it. I was going to see a long time family friend, Mickey Smith. He had moved to London after his father wandered off and his mother was deemed not fit to care for him to live

He greeted me at the door with a frown on his face. "Finally Sherlock, I thought you would never come." He welcomed us into his house and already he had cookies out. Mickey had the best cookies on the face of the planet, a recipe from his late grandmother. We ate them while they were still warm, and discussed why I was here. He had been accused of killing his girlfriend, Rose.

"You're going too think I'm mental, but what I say is the truth. Rose ran of with a time traveler."

"And?"

"You know last Christmas when a hole bunch of plastic mannequins came alive? That wasn't actually students like they said. It was the Nestene Consciousness, a big plastic blob. And this man, he calls himself The Doctor, says he's a 'Time Lord', was trying to stop it. But he was a little too late. All of those plastic creatures came alive and I got kidnapped and Rose came to save me, but ran of with The Doctor. He has this blue police box from the sixties, and calls it TARDIS, and claims it can time travel. I have no idea where she is and I don't even know if she's alive."

"You're going to have to come up with a better story than that. No adult is going to believe you."

"But you do, right?"

"You're story is all I have to go on, but it's a bit extreme. I have too believe you for the sake of progress. I already have some evidence that you didn't do it. But I need to speak with Rose's mother." Mickey took us the Jackie Tyler's flat, walking distance from where he lived.

"Do you think that Mickey killed Rose?" I said as soon as she opened the door.

"No. Who are you? Police? How old are you? Why are you asking about Rose?"

"That's all I needed." I turned around and walking away. Mickey was apologising to Ms. Tyler incessantly. "Come on Mickey! We have work to do." Mickey came running back and we went back to his flat. He gave me all the pictures of Rose and told me everything he could possibly remember and I began my work.

After about five minutes, I deduced this: Hypothetically speaking, if she really had run of with a 'Time Lord', with a time traveling 'TARDIS', then this 'TARDIS' could be malfunctioning, or something could have been miscalculated. It's time travel, so while it might be a few days to her, it might be a year to you. It could also be the other way around.

The body of the man she was giving the lottery money to was never found. It could have been blown up up the explosion blast, which, in Mickey's story, had been set of by the Doctor. She could have very well murdered him, then set of the explosion blast, felt guilty, so ran away and took up a new identity.

Rose could have also just ran away, for whatever reason, which was the most plausible explanation. But Mickey needed a story to get him out of being sent to jail for murdering his girlfriend.

So I constructed this: Rose ran off. I suggested she was disliking her current dull life, and probably wanted something new. After all, working as a department store assistant just have been boring. Another story would be that because she had no experience the blast traumatized her. She she had to get away. She also might have been injured and trying to hide it, but not wanting to worry her mother she went away to a hospital that helped her. Mickey said the first one was what closest to the real story. So so I made a little script.

It went like this: 'Rose was tired with everyday life. She started looking for 'The Doctor', a figure of her very active imagination. She ran away looking for him and left me a note. Soon enough she will realize that he is not real and will come back.' Mickey was to stick to this story. Of course I had written the note, but I'm a master at copping people's handwriting, so I think everyone could really believe it was her. He went in to question two other times the few weeks I was there. I stayed in the spare room and library most of the time, but other than that, I was walking around the great city of London, where I wanted to live when I was older. Mickey got off the accusation and I went home with another case under my belt.

A year later

I picked up my ringing cell phone and my family friend, Mickey Smith was on the other end. I remember the case that I had done a while back when he had been accused of killing his girlfriend. He claimed she had run off with a Time Lord but no one no one believed him so he had asked me to get him off the accusation.

"She came back, Sherlock and you won't believe who she's with!" He said.

"Rose, is she back with that Time Lord?" I said, an educated guess.

"Yes, and you won't believe it! Come quickly!"

"I'll be there as soon as possible." I said, then hung up. I pulled on my Belstaff coat Mycroft had given to my for my birthday, and went into the garden, where Mother was weeding.

"I'm going to be out for the rest of tonight." I said to her.

"I'll won't expect you for dinner then. Where are you going?" She asked.

"Mickey Smith's. His girlfriend came back. Want me to meet her."

"Be safe, Brilliance!" She called, using my childhood pet name. I left the house and headed for the nearest bus stop that would take me to London.

London, of course, was bursting with people, feverish, scared, people. Newspapers were screaming headlines like 'DOWNING STREET BLOWS UP' and 'ALIENS CONFIRMED?'. I went to the arranged address that Mickey had given me. It was Rose and her mother's flat, and the Doctor was there too, I was told. I was dubious about this 'Doctor' but I wasn't going to mention it. Some crackpot thinking he could time travel, I wanted to see him.

I knocked on the door to the flat and it was opened by Jackie Tyler. "Do I know you?" She asked.

"Yes we spoke once, about Mickey murdering your daughter. I was told she was back."

"You're the bloke who who helped Mickey! Of course, come in." She is here me into the living room and three people were stand there. One was Mickey, the other was Rose, and the third was presumably the Doctor. I shook there hands and introduced myself.

"So you got Ricky away from some time in jail, eh? Did you believe his story?" Asked the Doctor.

"I would like to see more proof of this 'TARDIS'."

"I'll show you if you can prove yourself."

"You have a Binary Vascular System, and a supreme intelligence. Tan lines show you where the same outfit everyday and work in a variety of weather conditions. You have married several women in your lifetime, but never wear rings. And you have one daughter, but she's not biologically yours. You've just been in a big war, were many people you loved died. You have to have a constant friend do to have a constant companion. Now you do me."

"Alright. You're going into the university. You are the youngest of three children. You live out of town with your family, and high intelligence is almost a family trait. You love bees, and plan to be a detective when you get older. You have already solved some cases, some big, some small. You also have a strong attachment to the family pet. Would you like to see my TARDIS?"

"Yes." The Doctor took me outside and behind the group of flats, where there was a 1960s police box just sitting there.

"And let me guess, it's bigger on the inside." I said sarcastically.

"She is, actually."

"I know a good mental hospital, if you need one."

He laughed, and unlocked the door. I opened it and looked around and took a deep breath, and started walking around. Almost immediately, I started to feel light headed. The thing was bigger on the inside. I layed down on the grated floor and closed my eyes. It was bigger on the insides. But what about physics? What about the laws of science? My breath started coming faster. My vision started to spin. My brain, so logical, seeing this clearly bigger on the inside, it was over loaded, how could this be possible?

"You alright?" It was Rose. She had entered the TARDIS, and was leaning over me, with a concerned look on her face.

"Absolutely not. How does it work?" She shrugged.

"I don't know. The Doctor never really answers questions, so I just stopped asking them."

"Boring." I said, getting up. "How does it work?" I asked the Doctor

"Well if you know how it works, it destroyed the purpose of theories."

"Theories. I don't care about them. I want to know how it WORKS!" The last word came out as a shout, as I realized how frustrated I was at not knowing how something worked.

"I really don't know." He shrugged.

"I don't believe you. Tell me how it works! Now!

"You really are persistent, aren't you? I don't know exactly how it works. I know how to use and fix it, but I don't know how she works."

"Ugh, fine. I need to get the next bus home. Good bye." I started to walk out, but the Doctor called after me, "This is the TARDIS, it can take you home in seconds." I crossed my arms and turned around. "Prove it." He smiled like he had something up his sleeve and started pushing buttons and pulling levers. "Hold on!" He yelled. The entire machine started to shake and move. A second later, it stopped. The Doctor opened the door and I stepped out onto my yard. Sure enough, I was back home. I sat down on the steps of my house and looked around. It was like only a few hours had passed. I turned around to face the Doctor and Rose. "Keep in contact!" Yelled the Doctor, and he shut the door to his TARDIS and it disappeared with a sound like a keys being scraped along the wires of an upright piano.

I walked into my house a new person. Everything I knew about science was changed. So many other things were possible. I went to my room and stayed up all night, changing my mind palace to the new information I had learned from the Doctor.

And that's how Sherlock met the Doctor. I think they would have stayed in touch over the years and become friends. Thanks for reading and hope you enjoyed!