'Sherlock' Trailer For Season 3 Is Here The long-awaited third season of Sherlock is just around the corner, and now the season three trailer has arrived. Two years after faking his death, Sherlock Holmes is back - and his once-devoted friend John Watson is mad ("I don't care how you faked it. I wanna know why"). The new season will premiere in the U.S. on PBS on Jan. 19 (viewers in the U.K. will get to see the first episode Jan. 1 on BBC). For devoted fans of Benedict Cumberbatch and Martin Freeman, it's not only going to be a merry Christmas with The Hobbit: The Desolation of Smaug's Dec. 13 release, but also, thanks to Sherlock's return, an extra happy new year.