Sherlock walked around the box, trying to figure out how it got there.
"This wasn't here yesterday," Sherlock said.
"Well, how'd it get here, then?" John asked.
"That's what I'm trying to figure out!" Sherlock said loudly. And then the door opened. Rather than opening outwards, like what the 'pull to open' sign said, it opened inwards. Standing there was "John Smith".
"Oh, hello! Just wondering if you could keep it down. Thanks!" he went to close the door again, but Sherlock held it open.
"Sherlock, what-" Sherlock was staring over Smith's shoulder.
"Oh, yes, that. This is my TARDIS, she's bigger on the inside, as you can see. Do you want to come in?" Smith asked.
"But- that's impossible!" Sherlock said.
"Well, it's standing right in front of you, so it must be possible," Smith said.
"Who are you, actually?" Sherlock asked.
"I'm the Doctor!" 'the Doctor' said.
"I'm a doctor," John said.
"No, seriously, that's my name," the Doctor said.
"That's an even worse fake name than 'John Smith'," Sherlock said.
"If I let you in the TARDIS, will you believe me?" the Doctor asked.
"I highly doubt-" Sherlock stepped into the TARDIS.
"That- that's not possible!" Sherlock said, immediately going over and touching various objects to make sure that he wasn't hallucinating.
"Woah," John stepped into the TARDIS as well. The door shut behind him with a click.
"The TARDIS can travel through all of time and space," John noticed Rose sitting on the floor.
"What exactly do you do?" John asked.
"Well, we save the world," the Doctor said.
"Except more like the whole universe," Rose added.
"That's pretty cool," John said.
"Right, then, allons-y!" The Doctor said, running around the console, pushing buttons and flipping levers.
"Where are we going?" John asked.
"I don't know! I put her on random!" The Doctor said.
"What kind of time machine has a 'random' setting?" Sherlock asked.
"Mine!" The Doctor said.
"Hold on to something!"