A/N: Yes! WHO!LOCK KID!LOCK! MY PLOT BUNNIES ARE MAKING ME FLAIL SO MUCH! …Sorry. So, I know I mentioned writing a parent!lock in my previous fic, but this latched on and wouldn't let go. So…I went on a road trip where we had like, over 5 hours in the family van, I had a pencil and paper…and…12 CHAPTERS OF THIS WERE MADE. And I thought, might as well give all those wholock fans some treats. And, because I am totally obsessed with kidlock right now, I made it kidlock to.

When Sherlock's birthday came around, he insisted that he and John not make any plans around the week in question, even and especially for his own celebration. "I have a friend who's coming to visit, but he tends to have…scheduling problems, so he could come at any time." And that was all he would say about the subject, much to John's protest. "Sherlock, we should at least plan dinner out somewhere! Is it really so terrible to want to do something nice for you?"

"No, John, but I have a friend—"

"Who can't keep track of time, I know. But surely no one's so bad at keeping track of time they need a week of window space?!" Sherlock appeared to be ignoring him. His head was cocked to one side, listening. There was a faint groaning and wheezing noise in the distance. "Sherlock, is that—"

"Ssshhh!" Sherlock looked over at John. "He's here. John, he's here!" John was stunned. He hadn't heard that noise since-

The door burst open. "Sorry, Sherlock, I think I missed your birthday—again." John stood with his mouth open. The man looked as gangly and awkward as he was back in Afghanistan. He looked the same right down to his bow tie and suspenders! "D-Doctor?!"

The Doctor took a good look at him. "John? John WATSON?! I haven't seen you in years! You know Sherlock?!"

Sherlock looked over at him. "John? You know the Doctor?"

"I was just about to ask you the same thing, Sherlock."

The three men just stood there in silence a moment, then burst out laughing. "Small world!" John said.

Sherlock heaved a big gulp of air as he said doubled over, "Small galaxy!"

The Doctor had tears in his eyes as he exclaimed, "Small UNIVERSE!"

As they calmed down they went over to the chairs to sit down, or in the Doctor's case, sprawl out all over the couch, and they exchanged stories of how they met. John met the Doctor briefly in Afghanistan on a particularly hard night. "He saved so many people by keeping every single one of us awake. He had to come over to wake me up 3 times, but I didn't lose one patient that night."

Sherlock met him during what appeared to be a mock werewolf case that turned out to be anything but. When John asked about the werewolf, Sherlock just smiled and the Doctor muttered something about the royal family and national security. John didn't press the matter further.

The Doctor finally jumped up and started pacing, saying, "Yes well that's all fine and good…but how do you two know each other?"

So Sherlock and John explained "A Study in Pink" to the Doctor, who looked briefly at John at the mention of killing a man. But he understood that it was the cabbie or Sherlock, and he wasn't about to want Sherlock to die, so he let it go. He put a bottle of something on the table that didn't quite look like wine or water, but something in between. John looked at it carefully. "What's in there?" But by the Doctor's smile he knew he wasn't about to get an answer. "I'll be right back with some glasses. Don't. Try. Opening and or drinking that until I get back. I want to share your birthday gift with you and John, okay, Sherlock?" Sherlock rolled his eyes. "Fine, fine, Doctor. Just get on with it."

"Be back soon!" He said as he shut the door.

"Well, out of all the things I could have been expecting, that certainly wasn't on my list." John said, leaning back.

Sherlock just hummed as he went to the kitchen. "Sherlock? What are you doing?"

He produced two glasses from one of the cabinets. "We're going to find out what's in that bottle!"