I’m auburn and that’s just not right for Sherlock. He’s a creature of the night. He’s got a dark, sociopathic side to him. The archetypal image of him is that he’s a slick-looking, dark-haired gentleman with aquiline features. The first thing my mum said when I mentioned to her that I’d got the part was “You don’t have the right nose.
Benedict Cumberbatch, on dyeing his hair dark for Sherlock, Esquire interview, July 2010 (x)