Solar System: A Sherlock and Doctor Who Crossover

Ahoy, Mateys!

Sherlock dashed towards the blue box that was appearing in his front yard.  For two years he had secretly hoped for the Doctor to return, but he knew that he wouldn't.  Now that he had, he couldn't believe it.  He was so excited to go on more adventures through time and space-

The door to the TARDIS flew open and Sherlock stopped in his tracks.  "Who are you?" he asked stupidly.

There was a stranger standing in the doorway, whom Sherlock did not recognize.  His hair was floppy, and... where were his eyebrows?  And was he wearing... a bowtie?  The man's face lit up.  "Sherlock!  It's so good to see you!"

"Who are you?  Where's the Doctor?" he demanded, and the man chuckled.

"Look into my eyes and tell me who I am."

Sherlock stared into his dark bluish green eyes, which were a completely different color than the Doctor's brown.  Yet somehow, there was something familiar about them... Just like the Doctor, his eyes looked much older than the rest of his face.  They were eyes that had seen many things and many tragedies, but they had also seen many happy times.  They were not the Doctor he knew's eyes, but somehow, he knew they were still the Doctor's.

"You recognize me, don't you?" the stranger asked with a sad smile, "Oh, Sherlock, it's still me.  It's still your Doctor."

"But... how?"

"You see, it's... It's like... I sort of regenerate instead of dying, so my body changes.  But that's the only thing that does change.  I'm still the same old me from... How long has it been?"

"Two years.  But I'm sure you barely remember me, since you've been doing fabulous things in those two long years." Sherlock pouted and Redbeard nuzzled his side.

"Oh, no, it's not that," the new Doctor replied, "You're forgetting that I'm a time traveller, so I don't live my life in the same order that you do.  I coud never forget about you, Sherlock Holmes."

Sherlock's face lit up.  "So are we going on another adventure, then?"  

"Would I be here if we weren't?" the Doctor smiled and walked into the TARDIS.  "Well, come on in, then.  And who's your friend?"

Sherlock looked down at his dog, who looked back up at him with his tongue sticking out.  "This is Redbeard.  Redbeard, this is the Doctor."  Redbeard walked into the TARDIS and barked, wagging his tail as the Doctor walked up and began to pet him.

"So where are we going this time?" Sherlock asked excitedly, "You know, we're learning about Ancient Rome in school, imagine how much I'd know about that if I actually went-"

The Doctor chuckled.  "Actually, I had something in mind for you.  Shall we?"

Sherlock jumped up in down as the familiar sensation of the TARDIS throwing him towards the ground as it took off, flying him into the unknown.  

When it finally landed, Sherlock lept to his feet, the familiar combination of thrill and adrenaline in his chest.  "Where are we?" he asked excitedly.

"Wait and see," the Doctor smirked and threw open the door.

"Woah!" Sherlock cried, running out the door, "Is this a pirate ship?  Mycroft says pirates are silly, but I think they're cool-"

The Doctor looked troubled.  "What's wrong, Doctor?"

"No, no, no, this is all wrong!" the Doctor frantically spun in a circle, taking in his surroundings.  "This isn't where I wanted to go!"

"Why would the TARDIS bring you some place that you wouldn't want to go to?" Sherlock asked, slightly freaked out by the Doctor's freak out.

The Doctor looked back at Sherlock.  "Oh, Sherlock, you're a genius!  You always have the right questions.  So, yes, why would the TARDIS bring me some place I wouldn't want to go?"

Sherlock shrugged.  "I don't know, it's just a dumb box."

The Doctor's jaw dropped open.  "Oh, no, no," he turned to his most trusted companion, "He didn't mean that, you're not dumb, and you're not just a box."

"What?" Sherlock asked.  Travelling through time and space was one thing, but a box that wasn't actually a box was a whole different thing.

"The TARDIS is very much alive.  The box is only her outer appearnce.  She only would have landed here if..."

"If what?" Sherlock eagerly asked, thoroughly intrigued.

"If there's danger, or something that needs to be resolved." 

"Can we be pirates?  Pirates are dangerous!  And cool!  Let's be pirates!  C'mon, Redbeard, how cool is this?"

"No!" the Doctor shouted, and Sherlock's smile slid off his face.  "No, Sherlock, you don't know the kind of danger I get myself into.  I want you to stay in the TARDIS.  Nothing can harm you there."

Sherlock sighed and drooped down, but he knew better than to argue with the Doctor.  "Fine.  Come on, then, Redbeard." he and his dog slumped into the TARDIS.

"Okay, stay there, I'll be back in a jiffy.  If I'm not... Oh, I will be."  The Doctor ran off, leaving Sherlock and Redbeard to sit alone in the living blue box.

Nearly an hour passed before Sherlock heard any noise.  He was waiting for the Doctor to show up in the doorway, but instead he heard something quite different.  It was a scream, coming from just outside the door.  "Doctor?" he called out, "Is that you?"

Another scream.  In that moment, Sherlock made a spur of the moment decision and ran out of the TARDIS to see what the noise was.  He had barely gone five steps when a pair of large, hairy arms grabbed him from behind and threw him to the ground.

Sherlock looked up to see a man with an eyepatch and a tricorne (and a very mean expression) pointing a long, curved sword at him.  "Who are you and where do you come from?  What is that thing?" the man growled in a gruff voice, making Sherlock shiver.

"I so want to be a pirate," Sherlock murmured under his breath as he contemplated how he was going to get out of this.