Mark Gatiss on Filming Episode 1

Clip: Season 4 Episode 1 | 52s

Sherlock Writer/Co-Creator Mark Gatiss on filming Season 4, Episode 1 of Sherlock. Season 4 continues Sunday, January 8th, 2017 at 9/8c on MASTERPIECE on PBS. #SherlockPBS

Aired: 01/08/17

Rating: TV-14

Funding for Sherlock, Season 4 provided by: Viking Cruises, Farmers Insurance, The Masterpiece Trust and PBS Stations.