As "Sherlock" season 3 finishes filming, fans have gotten glimpses of what's in store with set photos taken of exterior filming. Through this, we've seen some interesting glimpses of season 3, including flashback scenes with Moriarty, the return of Mycroft (Mark Gatiss), and of course, Sherlock and Watson, played by Benedict Cumberbatch and Martin Freeman. So without further ado, here is the gallery of "Sherlock" season 3 set photos.