Forget about the mystery of how Sherlock survived that fall, last night's return of the BBC1 drama posed an even bigger puzzle – what's that bunch of people doing standing still in the back of the shot in Westminster tube station and what are they gawping at? Answer: a film crew shooting Sherlock, obviously, the station only partially cleared for the scenes in which Holmes and Watson go underground to save parliament being blown sky high (just after the one hour two minute mark, if you're asking). The perils of shooting in the capital, showrunner Steven Moffat explained at a preview screening of the show last month, although he was not entirely enamoured by the unfortunate inclusion being pointed out. Still, there's an easy way to rectify it – get Derren Brown to visit the show's 10 million odd viewers and persuade them they never saw it. There's 12 other ways to fix it, but no time to tell you.
