Watch ‘Sherlock’ season 3’s finale online Last night PBS premiered Sherlock season 3, episode 3, “His Last Vow,” in the United States, and you can watch online for free starting today. February 3, 2014
‘Sherlock’ season 3 finale airs tonight: The detective meets his match Tonight the Sherlock season 3 finale will air on PBS in the United States, and in Benedict Cumberbatch’s own words, his character is about to hit real trouble. February 2, 2014