Sherlock will be hiding in plain sight upon his season 3 return, so don't expect an elaborate disguise...
Contains a spoiler for the Sherlock series two finale.
A high-vis security guard jacket and dog collar aside, one aspect of Conan Doyle's character that the BBC's Sherlock has yet to fully exploit is the art of the Holmesian disguise, whereby the Great Detective would transform himself into an kindly tramp or buxom washerwoman with the help of a smudge of coal dust and a wide-brimmed hat.
That's all part of the creators' plan, reveals Mark Gatiss, "We made a decision right from the get-go that he would not do disguise in the traditional sense. He actually has a line in The Great Game which is 'The art of disguise is knowing how to hide in plain sight' and that was because, right from the start, I thought modern day Sherlock Holmes would not put putty noses on, he would basically be standing behind you now and you wouldn’t know he was there. Ben [Cumberbatch] has put on various costumes, but it’s more about being invisible.”
We presume that means that the character's return in series three won't follow too closely its corresponding story from the Conan Doyle canon, The Empty House, in which Sherlock (whom Watson believes dead) emerges from an elderly bookseller disguise.
Let the theorising recommence!