Disclaimer: I don't own BBC's Sherlock or Doctor Who

Sherlock looked around, taking in every single detail of the seemingly-magical room he just entered.

"But Doctor, my mother, my brother, they will see the Blue Box. Mycroft will be curious, he will come looking for me. He will find us, he will know! He always knows." He looked to the tall, scrawny man stand before him who now had a goofy-looking smile plastered on his face.

"Oh, look at you! A mad man drops out of the sky with a magic blue box, says it's time machine and you go on and follow him. Sherlock Holmes, eleven years old, yet still as genius and curious as ever! Brilliant!" The Doctor shouted, clapping his hands together before twirling around and smashing his fist down repeatedly on a flashing orange button. "Oh, Amelia! We have a guest!" Sherlock, no longer standing near the doorway, was circling around the control room, taking in the TARDIS and all her beauty.

"A guest?" A Scottish voice carried throughout the TARDIS, making it unclear which direction the voice was coming from, but then he saw her. Tall and skinny, with flaming hair, a round face and pale skin. "What d'you mean a- Oh, hey there." She shot a glance at the Doctor, who was now running around the control pressing buttons and pulling levers like the mad man he is. "I'm Amy. So what's your name then?" He looked her up and down a few times, as though sizing her up, before standing up straight and looking her in the eyes. He remembered what Mycroft had told him some time ago, Everyone is an enemy until they prove to be an ally.

"Sherlock. Sherlock Holmes."

"Well then, Sherlock Holmes, what year is this?" He gave her an incredulous look. Surely, this was a dream. They couldn't really expect him to believe this was a time machine. But, when you have eliminated the impossible, whatever remains, however improbable, must be the truth.

"It is the year 1988."

"Oh, Doctor, you're no fun. I'm not even born yet!" She said with a pout. Not born yet? This had to be a joke.

"Is Mycroft behind this? Did he put you two up to this to mock me?" His brother is the only person who would do this to him. He was still angry about Sherlock borrowing his umbrella. He didn't mean to set fire to it. It was only an experiment.

But the Doctor looked oddly hurt by his accusation. Who was this Mycroft? The Doctor will have to visit him in a few years, figure out why Sherlock was so suspicious of him. He was about to ask Sherlock why Mycroft would do such a thing but Amy beat him to it.

"No, no Sherlock. I don't even know who Mycroft is, the Doctor doesn't either. Or, well he's never mentioned him before." She reached down, hesitating slightly before placing a hand on his arm, but he shrank away from her touch with a look of disgust, very obviously unused to physical contact. What kind of child was disgusted with human contact like that? She frowned at the thought and looked to the Doctor. The sadness in his eyes nearly broke her heart. She wanted desperately to gain this boys trust. What would an eleven year old want to see? "Say Sherlock, what do you want to be when you grow up?" He looked up at her with a new, gleaming excitement in his eyes that had been, so far, absent.

"A pirate! Oh, I want to be a pirate very badly! Or a detective! Or a pirate detective! Pirates are my favourite, they don't have any rules to follow, or dance classes to go to, or boring dinner parties to attend for Mother. They don't have to behave properly ever, and can do whatever they want, and they have lots of friends and family that love them.." He broke off suddenly, flushing. Amy and the Doctor felt a wave of sadness for this poor, lonely little boy. But the Doctor jumped at the Sherlock's words, this was how he could get Sherlock to trust them. "And why do you want to be a detective?"

"Well, I'm good at solving puzzles. I observe things and I make deductions based on my observations."

"Oh ho, you are brilliant! You really are." Sherlock flushed again, and Amy giggled at the Doctors reaction. It was an amused giggle, so unlike the mocking laughter Sherlock was used to. He allowed a small smile to show, but it grew larger as her laughter grew louder once the Doctor had begun to do a little "happy dance".

"Well, Sherlock Holmes, I'll tell you, I've met pirates! And Amy was a pirate for a very, very short while. And they were the best pirates I've ever known! And, at times, we can be something like detectives. And I think I can say we've made a rather fun job out of it." The Doctor and Amy both laughed lightly at their memories.

Sherlock eye's darted between the pair, looking for even the smallest hint of a lie, of denial. When he found none, he allowed his smile to grow even wider still. He liked to hear his two new friends laugh. The realization startled him slightly, the casual thought of having friends was alien but not unpleasant to him.

"Though, Sherlock, the Doctor and I, we haven't been entirely truthful." Amy spoke softly, hoping that Sherlock wouldn't jump to the wrong conclusions too fast. "See, this isn't just a time machine. The TARDIS is the Doctor's space ship too." Sherlock jaw went slack as he stared at Amy in disbelief. A time machine/space ship? The Doctor pulled one last lever and stepped forward to Amy and Sherlock.

"So, Sherlock Holmes, all of time and space, everything that ever happened or ever will, where do you wanna start?"

"Doctor, how will have we been travelling together?" Sherlock asked quietly. The three of them were lounging in the control room, piles and piles of books surrounding them. The Doctor looked up from his Harry Potter book for a moment before setting it down next to him.

"About three months, why?" The Doctor already knew the answer to his question and the fact that Sherlock's eyes were glued to the floor was just a confirmation. Amy stopped reading as well, she had been expecting this. Recently Sherlock had seemed lost in his own thoughts. She knew he thought he ought to go back home.

"I don't want to go back, Doctor, but I have to. Mycroft will now that I'm older, even if by just three months. He'll know. He always knows." Sherlock brought his knees up to his chest. Stupid Mycroft. He always got in the way of things, always ruined Sherlock's fun.

"I'll take you back. You'll only have been gone five minutes to everyone else. No one will even notice you were gone." The Doctor's sadness was obvious in his voice and it was mirrored in Amy's eyes. They had both grown rather close to Sherlock, gotten used to his small tantrums, his sarcasm, and his omniscient personality. But he was right. If Mycroft was anywhere near as intelligent as Sherlock was, he would be able to note Sherlock's, physical and mental, growth. Sherlock had to go home.

The trio sat in silence as the Doctor set the date and coordinates for Sherlock's bedroom, five minutes after they had left. When the TARDIS came to a lurching halt, Amy was the first to rise, pulling Sherlock into a tight hug and kissing him on the head. Sherlock held onto her tightly with the knowledge that he may never see her again. When they finally pulled away from each other, she placed a hand on his cheek and laughed quietly, tears threatening to fall. Sherlock couldn't stop the small, sad smile from growing slightly. He would miss Amy dearly, she had come to be like a sister to him. He slowly turned to the Doctor, who was staring at the ground with tears in his eyes.

"Will you tell anyone, tell them our stories? 'Cause they were great you know. We were something spectacular, the three of us." Amy turned her head away slightly, trying to wipe her eyes and hide a slight sniffle. "But who can I tell, Doctor? Who will believe me?"

Amy had been thinking about this, long and hard, trying to remember the name when it finally came to her. "Watson. Harriet Watson." She spoke quietly, almost to herself, and started again, louder. "Harriet Watson. She had a fling for a while with Mels, right when we were leaving high school. She has a brother though, John. They're five years apart, so if Harry was 27 then, she'd be about 8 right now, and John would be about 13!" She grasped Sherlock's arms suddenly, teary-eyed and smiling down at him, he couldn't help but smile back at her. "Sherlock, John was the sweetest boy, he was patient, loyal and kind and he's exactly the type of friend you need. The type of friend you'll be able to keep with you! It's perfect!" Sherlock looked sceptical of a real person wanting to be friends with him, especially someone 2 years older than him. What if this John Watson wasn't how she remembered him being? He supposed all he could do was hope for the best. They looked back up to the Doctor, who was now unashamedly crying. He looked like a proud father, watching his two children- and Sherlock thought that maybe in the Doctor's mind that's exactly how it was. He wondered if he would ever be able to find another father figure as the Doctor has been.

"But Sherlock, remember this always, it is of the utmost importance. If you do befriend John and tell him of us and our adventures, he can never tell anyone, especially not his sister, not if she's going to meet Amy. Because if he does, everything could change and none of this might happen. Do you understand?" The Doctor said, his tone unusually serious. But after Sherlock nodded emphatically, the playful tone came back once more. "Alright come on then, one last group hug." He shouted happily, pulling his small family into a tight hug. "Don't ever forget about us, Sherlock. This is not our last adventure."

"Will you come back, Doctor? In five years time, come back on this exact date to this exact spot. I will make sure I'm here. Maybe, I'll even bring John with me. But be here, please? I need you to prove that this actually happened. That when I step out of this box, I won't be waking up from a dream. Please, promise me this?" Sherlock's voice was so small, it reminded the Doctor of when they first met, how Sherlock had doubted Amy and himself, thinking it all to be a joke.

"I promise you Sherlock. We'll be here." The Doctor said ruffling Sherlock's hair, one last time before opening the doors to the TARDIS, revealing Sherlock's bedroom.

He walked slowly to the open door, turned in the door way to wave at his friends for what will be the last time for five, long years. Tears now streamed down both Amy and the Doctor's face as they smiled and waved back at him before he close the door and watched to TARDIS disappear.

He sighed quietly, before curling up on his bed, refusing to let the tears fall.

The next morning, Sherlock grudgingly asked Mycroft to look up the address of John Watson and bring him there. He knew Mycroft was curious as to why this random stranger was so important but was silent on the drive to the Watson's home. When they arrived, Sherlock jumped out of the car, and knocked on the door, asking a small girl, Harry, if John was home. A short boy with sandy blonde hair and slightly thick, muscular build came to the door, confusion etched clear on his face. "Hello, er, sorry who are you?"

Sherlock looked the boy up and down before offering his hand, "Sherlock. Sherlock Holmes. Do you like mystery stories?"

"Yes..?" John answered hesitantly. He had no idea what this boy wanted with him.

"Well then I've got some stories you'll find hard to believe." Sherlock smiled at John, and John smiled warmly back at him. It seems Amy was right about him.

If you guys want I might go somewhere with this, so please tell me what you think and thanks so much for reading!