Note: I dunno, this might be thing, but I don't think anyone would read this so ehh...
"John! It's impossible!" Sherlock snarled.
John sighed, seeing that apparently he can't watch tele in peace. Getting up from his comfortable position on the chair, walked over to the Sherlocks desk, it was littered with newspaper articles, prints out, and photographs.
He pointed at a man in a trench coat"That man appears randomly in all parts of history, in all parts of the world. It just not possible!"
John sighed "Look Sherlock , it's possible. Maybe they just look alike, perhaps even descendents"
"Oh yes , like your going to wear exactly what your ancestors wore, a trench coat, a suit, and the same pair of glasses. Be logical John!" Sherlock spat
"Sherlock, you need to stop. I know we haven't had a case in forever but your just driving yourself up the wall!"
"Shut up! I'm busy, don't bother me!"
"Dean look at this."
"What is it Sammy?"
"Here." Sam said handing some photos, some being old, and feeling they could be ripped at the touch, others being new, recently developed.
"What exactly am I supposed to be looking at?"Dean asked
"Look at that man, in the trench coat and suit." Sam said pointing at the pictures.
Dean looked over all the pictures, each of them had a single similarity, that man.
"Well, what do you think it could be?" Dean said turning to Sam.
" I dunno, how far apart each of these occurences are, are unnatural. Hunters and Men of Letters had been around when this man had occurred, they would've killed him surely."
"Maybe a warlock, or a familiar of a witch?"
"I don't know, there isn't enough for me to material to study and analyse." Sam said shaking his head.
"Or maybe, he's some sort of time traveler." Dean chuckled.