Preview: Season 4 | 40s

"You know why I’m here.” Here’s a brand new trailer for Sherlock, Season 4. A new season of #SherlockPBS premieres January 1st on MASTERPIECE on PBS.

Aired: 01/01/17

Rating: NR

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