“Consulting detective.”

There was a pause as they waited politely for John to introduce himeslf. “I’m his doctor.”

And the crazy man in the top hat only smiled and said:

“Doctor who?”

“Do not follow me under any circumstances.”

They waited for the doctor to leave, then Sherlock turned to John and cocked him a smile.

“After you?”

“Not so much the dark lord after all, eh?” 

“I will burn you.”

“Well that killed the mood…”