"Are you seriously trying to tell me that this blue box is a TIME MACHINE? Do we have to go see Molly again?" John had a look of exasperated disbelief on his face, and his arms were firmly crossed across his jumper.
"John, calm down. I'm not going to make you do anything. Just drink your tea. Everything will be okay."
John did as he was told, but soon regretted it. "This... this is why I can't trust you." For the second time that day, he collapsed, unconscious.
Sherlock had to work quickly to choose the correct destination. Shakespeare? Overdone. The future? Bad idea. Finally, he decided. "John. John. JAWN WAKE UP!"
"Hm? What? I'm awake!" John bolted up and analyzed his new surroundings. This room, with a tall, futuristic control panel in the center looked vaguely familiar. Was he, once again, inside that mysterious blue box. "Sherlock, where are we?"
"This is the TARDIS. And I can prove my story to you. Just peek out the window."
John stared at him, clearly unamused.
"Oh, go on, humour me."
John got up, stretched, and, cautiously, walked towards the front of the room.
"Afghanistan or Iraq?"
John squinted. He blinked rapidly. He scratched his ear, as if he believed his ears weren't properly working.
"Sorry?"
John glanced towards Sherlock, who was smiling smugly at him.
"Which one was it, Afghanistan or Iraq?"
"I told you it was a time machine."
"Is this... how did you learn how to do that?"
"Afghanistan. Sorry, how did you know..."
"That woman left a video. She travelled around in the TARDIS with a bloke called The Doctor."
"A doctor, eh? Seems like I might fit in just fine."
Sherlock blushed.