Sherlock is a British-American crime drama television series based on the Sherlock Holmes detective stories written by Sir Author Canon Doyle. Sherlock is created by Mark Gatiss and Steven Moffat, and is written by Mark Gatiss, Steven Moffat and Stephen Thompson. It stars Benedict Cumberbatch as Sherlock Holmes and Martin Freeman as John Watson. Sherlock was first released 25 July 2010 with the first season consisting of 3 episodes, with a total running time of 265 minutes. The second season was released 1st January 2012, the third season was released 1 January 2014 and the 4th season is to be released in 2017. Sherlock is a television crime drama based on the two main characters Sherlock Holmes who is a sociopath and a recovering drug addict and John Watson an ex veteran from the vietnam war, as they go around London solving murder based crimes that the police cant solve.