John

John sat in the black car one crisp early morning in London. It was the usual kind of day for John Watson. Sherlock had left the flat earlier in the night to do god knows what and left John with no note or anything to help identify where he may be. John was rather used to this by now however. He just shrugged off his flat mate's running off as nothing more than just a case or something. Either way, John knew that today was the day he could sit around the flat and read, watch telly, or blog like any normal person. He was completely and utterly wrong, though. The very second he got to his chair and opened up a book sitting on the pile on the floor his phone bleeped. It was of course from the British Government himself and now here he was; on his way to the Diogenes club. There was a heavy driver on the wheel and the man constantly glanced back at John. John didn't understand why. It wasn't like he was going to jump out of the fast moving car. No, he had learned his lesson after jumping out of one with his flat mate.

"John," Mycroft said, nodding for the good doctor to sit down as he walked into the room, not hiding the grumpy look on his face.

"Mycroft, just spit it out. I don't have time for-"

"Where is my brother, Dr. Watson?" Mycroft asked suddenly. John stared at Mycroft for a moment, noting that the man must have broken from his diet. He seemed fairly plumper than usual and the room was an over powering smell of…bad breath? He must have forgotten to visit his dentist as well. "Where is my brother?" Mycroft repeated, breaking John from his observations. The good doctor simply shrugged.

"He went out last night. Just the usual," John replied.

"I see." Mycroft sat straighter in his chair, his eyes dull and lifeless. John frowned into them. Where was the clever spark of light? John ran his eyes over the elder Holmes again. Something was wrong. He didn't know what, but he refused to stick around and find out.

"Well, I'll let you know if I find anything Mycroft," John stated, stepping quickly to the door. Just as he was about to step out of the office a metal door slammed shut, blocking his way. John's heart thudded in his heart.

"I can smell it on you, Dr. Watson. I can smell the lies," Mycroft spat, but it wasn't his voice any longer. The voice was deeper and well…just not human. John argued with himself not to turn around; not to look at the elder Holmes. John's curiosity was stronger than his reason, however and he couldn't help but to sneak a peek. John instantly regretted the action. A suit of skin now lay on the floor. John had to use every inch of power he had to keep from gagging at the sight. Standing on top of the skin were two large green feet with long claws and connecting to that was the body of a dark eyed monster.

"Wha…What are you?" John stammered, stepping back until he was pinned against the doorway. The creature chuckled lightly, blinking at John with its inhuman eyes.

"We are the Slitheen," a new voice chuckled from the other side of the room. The driver who had escorted John into the room was now a pile of skin as well. Now only a green monster stood in his place. John's heart hammered in his chest and he watched in terror as the creatures came closer, lifting their claws up to John's throat. "Where is Sherlock Holmes?!" they ordered him. John pursed his lips, shaking like a leaf. Why did they want Sherlock? Had he done something…What was he thinking?! If Sherlock knew little…big green creatures were real he would have told him, right? Either way, he didn't know where Sherlock was and even if he did he wouldn't say a thing. With a quick breath John stared at the green monsters, clenching his fists until his knuckles turned white.

"That's for me to know and for you to never find out!" The creatures hissed in outrage by John's answer and lifted their claws to slash into his flesh. John squeezed his eyes shut, a soft prayer running along his lips. That's when he felt the breeze ruffling through his hair and kissing his skin. A noise like no other hummed in his ears. He could have sworn he heard the creatures hiss at the noise; repeating one word. Doctor. John forced open his eyes to see a blue box sitting in the office. The green monsters were no longer looking at John now. All their attention was on the box. John shook his head. He must be going mad. All these late nights and crime fighting must finally be getting to him.

Clara

"Doctor, what are you doing?!" Clara shouted as The Doctor slammed down a few switches on the T.A.R.D.I.S council. The Doctor was beaming away with a wild smile. She didn't understand what was happening. One second they're on their way to the 5609 Olympics, and the next The Doctor gets a strange message on his psychic paper and they are blasting away through time. "Doctor?!" Clara shouted again, holding on for dear life as the T.A.R.D.I.S whipped them back and forth violently. The grumpy old cow! Why can't she just fly smoothly for once?! Just as The Doctor opened his mouth to answer her, the amazing time machine jerked to a halt and the two of them flipped over onto their backs.

"Earth! London!" The Doctor chanted, bolting from where he lay and pulling open a floor panel.

"Yeah, I'm alright, thanks for asking," Clara huffed, picking herself off the floor of The Doctor's time machine. She stepped over to The Doctor's side, watching as he pulled out a plastic spray bottle marked with black lettering: Vinegar.

"HAHA! Here we are!" The Doctor shouted, shoving the bottle into Clara's hands and straitening his bow tie.

"Doctor-"

"Clara, now listen to me. In this bottle is a deadly substance-"A scream rattled off from outside. Clara flinched; her eyes, flying towards the doorway. The Doctor's face instantly dropped from its peppy flourish of excitement to a fierce and terrifying look that sent shivers down Clara's skin. "Stay close, Clara," he stated simply, marching over to the door and swinging them open. Clara followed him without hesitation and found herself face to face with large green monsters and a man with blondish hair and a jumper. One of the creatures had its long claw above the man's head, ready to strike him at any moment. The Doctor smiled at the sight of the creatures.

"Well, now! Raxacoricofallapatorians! The Slitheen family I presume?" stated The Doctor. The creatures made a growling noise in their throats.

"Yes, Doctor and we know you as well."

"Well, yes. Who could forget this gorgeous face? Well…this one and several others."

"You are the destroyer of our kin!" snapped the one that was not threatening the very pale looking man in a jumper. The Doctor simply shrugged, leaning against the TARDIS casually.

"You threatened the people of this planet. I gave you a warning and you ignored it." The Doctor's eyes then scanned over to the man being threatened by the Slitheen's claw. He frowned at the man for a moment and then his eyes widened in realization. The Slitheen both chuckled to themselves as they glanced between the man and The Doctor.

"Well, isn't this a sweet reunion?" they chortled.

"John…" The Doctor breathed, looking absolutely surprised. "What..."

"Who are you people?!" the man known as John shouted, stepping farther back from them, but there was a door in his way.

"John, I'm sorry. I know this is hard for you to understand at the moment but…" The Doctor paused, taking in the terror gleaming in John's eyes. "Where is Sherlock?" Clara frowned at the name. Wasn't that a detective from some book? She glanced at the man called John, noticing that his eyes were overflowing in protectiveness and fear.

"I…I don't know…" John slurred, falling to his knees. Everything must have been starting to become too much for him. Clara stepped forward to stop his fall, but the Slitheen's arm came down at her.

"Clara, use the vinegar!" The Doctor screamed at her as the claw came closer to her throat. Clara heard herself scream as she lifted the bottle and sprayed the green monster. The creature paused for a second and glanced at the other.

Splat!

Green gunk erupted all over them. The living Slitheen screeched at the sight of its brother splattered along the walls and The Doctor quickly jumped into action. He dashed to Clara, who was trying to lift the unconscious man. They carried him into the T.A.R.D.I.S, ignoring the screams of the Slitheen as they flew away in their time machine.

"Doctor, what happened? Who is this and why did those…those things want him?" Clara asked, as The Doctor draped his coat overtop of John. The Doctor bit at his lip, staring down at the man that now lay on the floor of the T.A.R.D.I.S. He took in a deep breath and pointed at John with his pointer finger.

"This is Doctor John Watson and those things want him in order to hunt down the most cunning mind on Earth." Clara frowned at The Doctor.

"Who's that then?" A smirk crossed The Doctor's face, but another voice answered her question. She looked down to see John very much awake. His eyes looked a bit dazed, but other than that he looked fine. Slowly, he sat up and looked Clara in the eyes and stated simply,

"That man would be my friend Sherlock Holmes."

So this is just a simple crossover with Sherlock and Doctor Who I've been arguing to myself about for ages now. It'll keep going if I get some good feedback and if you guys enjoy it of course. I'm not used to writing Crossovers, but I had an idea and I just thought; "What the hell." I'll try anything. So...anywho, I hope you all enjoy it and don't forget to leave a review!