There's this great line in Sherlock Holmes: The Final Adventure where Sherlock, talking about Moriarty to Watson says,
We are two men who share a shadow; our every move betrays us—one to the other.
It has sort of inspired my staging and our production of the show as the story weaves in and out of various locations (Baker Street, Briony Lodge, the Stepney Gas Works, a train, etc....). Essentially nothing is as it seems as the very fragmented scenery is used in various ways to move in and out of these locales. One minute a chair might be in Holmes study, and the next that same chair might be in Briony Lodge. We're having fun pulling it together, and working to make the concept clear in the telling.
Here's hoping we succeed.