Benedict Cumberbatch has played detective and monster, barrister and scientist, politician and painter, comic and spy. Still only in his thirties, and with a string of starring and supporting roles, he has portrayed contemporary icons, historical figures, and fictional favorites, from Stephen Hawking, to William Pitt the Younger, to Frankenstein. But inevitably, he is still best known for his idiosyncratic and boldly 21st century incarnation of Sherlock...