Watch Sherlock Season 4 Episode 2 Online. Best and Free Online streaming for Sherlock TV Show. We picked the best sites to stream s04e02. Simply pick a site below and click "Watch Now!" button next to it. Some of the links may be broken, please upvote the working and good links so other users see those links for Sherlock Season 4 Episode 2 s04e02 at the top of the list.