"I'm assuming they're having a season for each of the compilation books, which would mean Series 3 being based on Return of Sherlock Holmes and then there being a Season 4 for His Last Bow and Casebook."
"Well, the "wedding" is presumably John's marriage (either to Mary Morstan or the mysterious second wife of his), "Rat" could be the Giant Rat of Sumatra, the case mentioned but not expanded on in canon, and Bow is probably…"
"Haha i dont live in the uk i wish i did! Three teaser words were released to describe what the episodes in season three are going to be about. For example, the words for season 2 were woman, hound, and fall. So now (I think I was Moffat) who tweeted…"