Someone asked for this, so I’m posting a ton of links to spoiler videos shot on set.
There are several theories regarding these:
1) they’re legit and actually give clues as to how Sherlock faked his death
2) they are red herrings filmed specifically to throw off the fans
3) they are various theories that characters in the show (John, Mycroft, in-universe fans) came up with and are being filmed to go along with a verbal explanation
4)They are John’s nightmares/hallucinations/paranoia
Nobody knows at this point, but as a reference to Moffat’s character, he has filmed red herrings before for Doctor Who (even writing fake scripts to throw off the crew) so none of these theories are out of the question.
These are various and assorted videos, most of which are major spoilers, so click at your own risk. You have been warned.
Mad Libs with Moriarty
While this is, thus far, a small meme, it is the first true meme I have seen that is born of “A Scandal in Belgravia” (i.e. something that is not self-explanatory, such as Sherlock in a bedsheet).
Near the beginning of “A Scandal in Belgravia,” Moriarty receives a very poorly-timed phone call. While it is clearly implied that the call was from Irene Adler, and while we hear Moriarty’s side of the conversation, it is never revealed precisely what Irene said. This has left a gap into which the fandom has characteristically poured as much crack as possible by filling the blank spots in the conversation. While the call was canonically from Irene, Sherlockians have also imagined that it might have been Sebastian Moran, characters from other shows, and in one case, the Baker Street Pastry Shop.
Examples to follow.