I still don't own these shows, this fanfic is all fiction and I made it up in my head. The actual characters belong to various different people and not me, but you knew that already. :)

**Two Days Later**

The Doctor was in the middle of saving Aristotle from a few rogue Slitheens when Clara gave him the message.

"Doctor!" she shouted breathlessly, after running from the TARDIS to tell him. "I've got a note! I'm pretty sure it's for you..." She held it sideways, unable to read the handwriting. "At least, I'm pretty sure..."

They were stood in the courtyard of an Ancient Greek building, which was open on all sides to the Slitheen attacks. The monsters wanted Aristotle to wear as a skin suit, because people saw him as powerful. The Doctor wasn't about to let that happen.

The Doctor looked from Clara to Aristotle, and back. "We should probably finish this first, Clara." Both men had already ran over two miles, trying to get to the TARDIS before the Slitheens, acting as Athens people, caught up with them. Aristotle was old, and the Doctor was seriously concerned for his friend. He wasn't sure he could run much more.

Aristotle noted the exchange and shook his head. "No, you go," he said quietly but firmly.

The Doctor looked at Aristotle, shocked. "But, Aristotle, old friend... Not much longer now, the Slitheens!"

Aristotle gave a knowing smile. "Go help your friend." He nodded at the note in Clara's hand. "Remember, you will never do anything in this world without courage. It is the greatest quality of the mind next to honour. I have a feeling you're going to need both."

The Doctor grinned, recognising the phrase. He gave his friend a hug. "We'll be back for you, of course," he whispered in the man's ear.

Aristotle broke the hug first. "I don't doubt it," he smiled. "Now go!"

The Doctor gave one last nod to the great figure, and turned to Clara. "C'mon then!" He was saddened he couldn't take Aristotle, but he knew his friend couldn't run any longer, and vowed to come back for him soon. He grabbed Clara's hand, and they set off running the next mile towards the TARDIS. Why were they always running?

**Meanwhile**

Sherlock was getting fidgety in the flat. He had nothing else on except the traffic case, which he was completely stumped on. He had an idea for who was responsible, but until the Doctor arrived, Sherlock had nothing to do but wait. For God's sake, Sherlock thought, the man has a time machine, why isn't he here yet?

Once again, Sherlock found himself examining his skull, remembering when its owner was alive. A childhood friend, he was. But now he was dead. Still, the skull was great for bouncing ideas off, as long as he wrote them all down. Otherwise, he had a habit of forgetting the ideas after a while. Still, Sherlock had nothing better to do while John was away.

His phone rang again, for what must have been the 7th time this morning. Sherlock didn't answer it, because he knew it would be Anderson, ringing about the case. Sherlock imagined how it would pan out if he did, but decided against it, since he was quite fond of his mobile phone, and didn't want to throw it out of the window when Anderson ultimately annoyed him too much.

It went to voicemail, and, Sherlock, out of pure boredom, decided to listen to it. Anderson's voice filled the apartment: "Erm, hi, Sherlock, it's Anderson here." Sherlock sighed. "I just wanted to know, I mean it's no rush or anything, just-" There was a rustling sound on the other end of the phone, and the next voice Sherlock heard was Lestrade's, which made him smirk. "Look, Sherlock, we need anything you've got. We don't know when this will happen again, and..." Sherlock heard Lestrade sigh, and noted the stress in his voice. "Just... Come in as soon as you can." The phone clicked and the message was finished.

Well, Sherlock thought, that was... interesting. Still, where was the Doctor?

**1 Hour Later**

"Aaah!" The Doctor shouted in frustration. He'd been analysing the handwriting on the note for the past hour, but couldn't trace it to a time or a place. He'd hoped the handwriting might make the job easy, but so far even the TARDIS couldn't recognise the scribble of the person who needed him so desperately.

Clara was sat next to the TARDIS console when the Doctor turned to her. "Tell me again how you came across the note?" he questioned. His eyebrows knotted and he looked at Clara hopefully.

She sighed. "This man came on the screen, and he looked important, and he said he had the note of someone who needed your help. I think he was from the government or something, but I don't know. I asked him who'd sent it, but the man said he didn't know, he was just instructed to give you the note. So he scanned it into his computer, and the TARDIS printed it out. I read it, then ran straight to find you in case it was important. That's it." She inhaled heavily, having said the story quickly to the Doctor.

The Doctor wrung his hands, pacing backwards and forwards in the wide space of the TARDIS's main room. "Did you say the man looked like he was from the government?" Clara nodded. "And he had no idea who it was from?" Clara shook her head sadly. The Doctor sighed, collapsing into a chair next to Clara, putting his head in his hands.

Suddenly, the TARDIS console gave an obviously meaningful bleep, and the Doctor sprung out of his chair. He ran over to the elevated screen, and gave a small chuckle. "Clara, ever wanted to go to a parallel universe?"

Clara stood up and walked over to next to where the Doctor was, fiddling with buttons and levers frantically. "But you said that was impossible now..?" She trailed off curiously.

The Doctor continued to work, and said: "Ah, you're right, but..." He twisted two levers "if I get this right," he pressed six flashing buttons in quick succession "the signal from the note looks strong enough, paired with the communication with the parallel UNIT leader..." He pulled a final lever, and the TARDIS shuddered, setting off. The Doctor stepped back proudly, and looked to Clara, smiling.

"Ever wanted to meet Sherlock Holmes?"

**10 minutes later**

Sherlock paced the flat, becoming more and more irritated. He couldn't do this without the Doctor, but it looked like he wasn't coming. Sherlock dreaded the thought of having to do this alone. If his theory was right (which it usually was) he wouldn't be able to do this without someone with experience. He was sure he'd come across this sort of thing before, but this was different. Very different.

Sherlock hated to ask for help.

He'd texted John in the past couple of days, finding out that actually, John was staying for a week with his girlfriend. This annoyed Sherlock a lot. Admittedly, he was slightly jealous of John's girlfriends. Whenever John got another one of his air headed playthings, Sherlock was kicked to the kerb until they kicked John to the kerb. It made Sherlock feel second rate, at best.

This was another thing Sherlock hated about having to rely on other people. They were unreliable, and Sherlock couldn't work at his own pace. He had to wait around, and that led to thinking about feelings. Sherlock much preferred facts.

Suddenly, a screeching noise filled the flat. Sherlock chuckled at the familiar sound, watching the blue box materialise in the centre of the room. The door swung open, revealing a tall man in a bow tie and a smaller girl, with wide Bambi eyes and a large grin on her face. Sherlock sighed. "It's about time, Doctor." He walked over briskly to shake the man's hand.

"Hello to you too, old friend," the Doctor replied.

**5 minutes earlier**

Clara walked back into the TARDIS control room, wearing a deerstalker and a tweed jacket. She couldn't wait to meet the great Sherlock Holmes, whose stories she'd devoured as a child. Alright, maybe these clothes and the pipe she was carrying were a bit much, but it was just fun, really.

The Doctor spotted her change in outfit and laughed out loud, shaking his head. "He's not going to like that. Not at all." He laughed again, forgetting to concentrate on maintaining the signal, and the TARDIS swerved violently. He turned quickly back to the controls, but Clara noted he was still smiling.

She bit her lip. "Should I change, then?" She didn't want to make the wrong impression.

The Doctor looked at Clara in alarm. "No, don't! It will be great."

Clara had wondered if there was some sort of rivalry between the men, as both thought they were super geniuses with a less clever sidekick, of sorts. She supposed she was about to find out, because at that moment, the TARDIS came to a loud stop. They opened the TARDIS door, and Clara noted the surroundings while half listening to the exchange between the men. The room was cluttered, but still well organised. A varied book shelf contained everything from Darwin to Dickens, and a fairly new TV stood in the corner, which suggested the Sherlock Holmes of this universe wasn't from the same era as Conan Doyle's.

She saw the men shake hands and felt slightly out of the loop. "So," she piped up. "When are we going to solve this mystery?" She looked between the two men, who both looked exasperated at her for ruining the moment. "What?" She asked. It felt like she was dealing with two Doctors all of a sudden, and wondered if her entire time here would be like this.

She had a feeling this was just the beginning.

A/N So, that was that then. I hoped you liked that chapter, it had a bit more Doctor Who in. Hopefully, a bit more action starting now. A note on timings: a few times in this chapter, I mention things like that present day Sherlock is happening at the same time as the Doctor saving Aristotle. Obviously, these events aren't happening at the same time, but in terms of the timelines meeting, they are happening at the same time in the Doctor and Sherlock's respective timelines. If that makes sense. Sorry if it doesn't.

Thanks to the wonderful Sherlockreader, Misplacedhyperquill, Eta, BloodLily16 and Tabby Dreamer for reviewing the last chapter. As always, I appreciate everyone who bothers to read my terrible ramblings, especially the whole way through the Author's Note. New chapter maybe next week, maybe the week after, maybe longer, depending on stuff in my life. Please review if you liked it, that would be lovely. Wow, that was a long note. Sorry about that. 3