Benedict Cumberbatch, the star of Sherlock, has given fans a somewhat gloomy update on the future of the series, hinting that the return of the famous detective would require a hefty investment.

Andrew Scott as Sherlock's malevolent nemesis James Moriarty, and Lara Pulver as the enigmatic and astonishingly capable Irene Adler. Upon its release, Sherlock was met with rave reviews from ...