What if (multi-fandom)

Chapter 1- its missing

It was 7 in the morning. Sherlock had been browsing the internet for unsolved mysteries. He didn't care how ridiculous they sounded he just wanted something to do.  Sherlock would't listen to John when he told him to stop looking into supernatural mysteries and story's about a magical blue box. That brings light and hope to its surroundings.
But in every article sherlock found that mentioned this blue box also repeated another word over and over 'Doctor'.
" John" Sherlock said not even looking away from his computer screen. There was no answer. " John" still no answer. Finally Sherlock looked away from his computer screen to find he was completely alone.
Sherlock saved his research onto his desktop before leaving his computer. He only started to save his discoveries last week when they were working on a murder. Turned out the maid committed the murder and her confession was on Sherlocks laptop,he was going to show the team investigating the murder but accident deleted it.

The sound of the flat door opening echoed through the silent flat.
"Sherlock." There was know answer, but this was not unusual for Sherlock he often ignored John. John slowly walked around the corner to see Sherlock sat in his chair with his fingers together in front of his face. "John.." Sherlock broke the silence. " yes."
"Why didn't you tell me you were going out I was going to ask you to go and buy some-"
John interrupted" Jaffa cakes. Already got them" " uh, brilliant" John handed Sherlock the packet and he opened it and started to eat the first one when he noticed John was watching him. " what?" " can you not eat that with out pulling it apart first" John asked. "it taste better" Sherlock answered simply. "does it, really" John was being sarcastic.

"Oh John I wanted to ask you something"
" go on"
" well I was searching this mysterious Doctor when I came across an addressed. I knew I recognised it then it hit me. That's were you use to live."
John leaned in closer to the screen "oh yeah, so is that we're this mystery doctor is living. I could give him a though tips on how to get the boiler working." John laughed.
" John don't you see, this is the perfect cover. You just go and knock on the door and say ' I use to live here, do you mind if I take a look around'. Simple" Sherlock explained.

" you know that won't work right, he's not just going to allow a stranger into his house."
" it's not his house, well it is but he doesn't live there. His friends do, so we can ask them where he is."
John sighed " and what makes you think there going to tell you?"
Sherlock grinned " wait and see" sherlock grabbed his cote and scarf and walked over to the door." In your own time John..."
John looked confused. " wait what.were are we going"
Sherlock just smiled and opened the door before gliding down the stairs while John tried to keep up.

Once sherlock was on the ground floor he wasted no time and immediately opened the door and walked out onto the street before calling a cab. John fallows closely.

A black cab pulled up almost instantly. And Sherlock and John climbed in.

Sherlock handed the driver a small folded peace of paper. With directions on John assumed.

Shortly after the cab pulled up at the history museum.

" what are we doing here?" John asked
Sherlock didn't answer just stepped out the cab leaving John to pay.
John just handed the driver a handful of change that looked to add up to £ 8. 26.
The driver took the money then just looked at it confused.

" thank you." John said before stepping out the cab and closing the door.

John tuned around but Sherlock was know where to be seen.
" uh Sherlock, always leaving me behind. Doesn't care what I think I might as well not be here." John muttered
" uh cheer up. If you weren't here I would have no one to rant to" Sherlock said while standing behind John.
" where where you?"
" paying the cab"
" but I just paid the cab"
" uh the little, well he took it"
" so now we have no money for the museum"
" I'm Sherlock they have to let me in..." Sherlock said rather smug before strolling to the front door.
-----------------------

" uh why won't you let me in... I'm not going to steal anything... Probably" Sherlock complained after about five minutes of trying to persuade the security guard to let them in.
" sorry sir you have to pay"
" fine" Sherlock said before storming out of the museum
" can we go home now." John asked
" no we're going to break in round the back"
John sighed " we're going to get arrested aren't  we."
" quite possibly" Sherlock said opening a window and climbing in. Before John followed.

Sherlock and John had been wondering round the museum avoiding security for about ten minutes when Sherlock stops in his tracks. Before walking backwards.

" Sherlock what are you doing?" John questioned him with a puzzled look on his face but Sherlock continued to look confused. Sherlock walked up to a glass case and looked inside. He could tell that something was missing, But what.

" you see it too don't you" came a voice from behind them. Sherlock turned around to find a tall man with brown hair. " see what... Sorry who are you?" John asked the man.
" I'm the Doctor" the man said
" doctor who?" John asked narrowing his eyes at him.
" just the doctor..."
" oh come on you have a real name everyone has a real name some people have a terrible really name. If that's the case than I'll let you off." Sherlock said rather quickly before turning to look back at the glass case.
" nice trench coat" the doctor complimented Sherlock.
" yes" was all Sherlock said still looking in the glass box.
" he means thank you. He has trouble with manners" John explained
"No I don't. People just don't understand" Sherlock complained.

" it's been removed." Sherlock said " without the glass case being broken" the doctor finished. " meaning whoever took it must work here" Sherlock said " meaning they would have access to the keys." The doctor finished again.
" what...?" John interrupted
" someone that works here stole it, do keep up"Sherlock said.
" stole what?... What's missing?" John said hoping for an answer.
" a book. It's called a bestiary." The doctor explained
"What's so important about an old book" John said with a confused expression.
" it contains greek mythology on supernatural creatures " the doctor explained.
" but supernatural creatures don't exist so why would someone steel the book" John complained
" you say they don't exist, what you should be saying is anymore..." The doctor said with a series face.

" there's still a page in here... It must of fallen out.... Get ready to run" Sherlock opened the glass case setting off all the alarms. He grabbed it and closed the glass case but the alarms were still going off.

" follow me." Shouted the doctor as he started running. Sherlock and John followed closely.

They followed this strange man who calls himself the doctor to a blue box. The doctor ran to the doors and searched through his pockets frantically searching for his key.
" found it" he said excitedly before putting it into the lock and going inside.

Sherlock and John just stood there confused as to why he would hide in a small box.

The doctor ran back out.
" come on." He said waving his hand

John could hear the security guards coming closer.
" Sherlock we need to go now..," John said before walking into the big blue box. All Sherlock heard was. " wow" this made Sherlock quires so he decided to join John and the doctor in the weird blue box.

Sherlock walked into the box and his eyes widened. "It's bigger on the inside."
" yep"
" wait. Your the doctor. The doctor" Sherlock asked"
" yep."
" John don't you see it... This was who I was going to hunt down"
" hunt down" the doctor interrupted looking extremely confused.
" yes I got board"
" I see. Oh we've got to go. security guards are outside"
" go where"
" anywhere" the doctor smiled, " hold on"the doctor said pressing some buttons until they disappeared from the London museum.