Mark Gatiss: A Study in Sherlock [507046] Released: 2016-01-11 Revenue: $0 Budget: $0 Profit: $0 Runtime: 28 mins Popularity: 0.3583 Vote Average: 7.3 Vote Count: 6 Overview: Mark Gatiss, who co-created "Sherlock" and plays Mycroft Holmes, discusses the show with Benedict Cumberbatch, Martin Freeman, and others in the cast. Cast [6] Mark GatissHimself Benedict CumberbatchHimself Martin FreemanHimself Una StubbsHerself Rupert GravesHimself Steven MoffatHimself Trailers