Mark Gatiss

From The Arthur Conan Doyle Encyclopedia
Mark Gatiss as Mycroft Holmes in TV episode The Empty Hearse (2014)

Mark Gatiss (born 17 october 1966) is a British writer, director, producer and actor who played Mycroft Holmes between 2010 and 2016 in 9 episodes of the TV series Sherlock with Benedict Cumberbatch as Sherlock Holmes.