 According to overnight data provided by the Broadcasters ' Audience Research Board ( BARB ) , the highest overnight figure from the first series of Sherlock was 7 @.@ 5 million for the opening episode , " A Study in Pink " , whereas the second series averaged over 8 million viewers . The three episodes of series two were the three most watched programmes on iPlayer , the BBC 's video @-@ on @-@ demand service , between January and April 2012 . Its opening episode , " A Scandal in Belgravia " , attracted controversy from the tabloid newspaper Daily Mail , which reported that Irene Adler 's nude scene early in the episode had been met with disapproval from some viewers who were concerned that it had been shown before the 9 : 00 pm watershed hour , before which adult @-@ orientated content is not supposed to air . Some critics also took exception to Moffat 's treatment of Irene Adler , arguing that she was sexualised , an argument rejected by others , including Moffat . The series ' conclusion , " The Reichenbach Fall " , in which Sherlock fakes his suicide by jumping from St Bartholomew 's Hospital , led to speculation on forums , social networking sites and in newspaper articles about its resolution . 
