Watch Project Blue Book Season 2 Episode 4 Online. Best and Free Online streaming for Project Blue Book TV Show. We picked the best sites to stream s02e04. 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 Project Blue Book Season 2 Episode 4 s02e04 at the top of the list.