Sherlock - Season 4

Based on Sir Arthur Conan Doyle's Sherlock Holmes detective stories, the BBC and WGBH Boston produce a series named Sherlock that first airs in 2010. Ten episodes have been produced and a special espisode is aired on 1 January 2016. It contains a special: Mark Gatiss: A Study in Sherlock - 30-minute "making of" documentary, and Production Diary.