"He's a what?"
"A timelord," answered Sherlock, treating the answer as though it wasn't crazy.
"What is a timelord? Sherlock, is this a joke?" John said, becoming angry with Sherlock and this Clara. They were talking nonsense as though it made perfect sense!
"Don't you dare say that. He was a joke for such a long time, but he has saved planets, worlds even, and I love him. So shut up and let Sherlock and I explain," said Clara, rather huffily. She seemed more riled up than usual in Sherlock's eyes. When he had met Clara they were in fact at a conference with the Doctor, but the Doctor suddenly got whisked in to the Centre of the T.A.R.D.I.S., causing him to be sent who knows where. Sherlock was very calm about it but Clara was very upset. She would come up with the worst scenarios on where he'd been sent too until she finally broke down and cried. Sherlock tried to comfort her which ended in a very awkward hug between the sociopath and the impossible girl.
"Okay fine, but still I'll need proof on this 'timelord' thing. What does he do?" asked John, putting on a calm face.
"He's an... alien," said Clara, stopping to allow Sherlock to reassure John that this was true, "He comes from a planet called Gallifrey in the constellation called Kasterborous. He is a race called the timelords, they can do this thing, it's called regenerating, and when they die they regenerate into a new face and body that is healed. He has two hearts and he only has 12 regenerations, though the doctor has more because his wife gave him hers, she's half human." Clara finished abruptly and sighed, knowing that John thought her completely crazy and that she would have to do something painful.
"Sherlock, I'm sorry but your friend Clara? Yea, she's a loon," said John, looking at them both incredulously. Sherlock looked at Clara, telling her that now would be a good time to do the thing.
"Alright, Mr. Watson, I know this all seems crazy but it won't in a minute. The Doctor showed me how to do this, and it hurts a little bit but I think you need more background." Clara placed her nimble, but strong, fingers on John's shoulders and bashed her head into his. They both cried out in pain but John couldn't for long for his brain was being flooded with images and the entire life story of a timelord called the Doctor.