Watch American Dad! Season 16 Episode 18 Online. Best and Free Online streaming for American Dad! TV Show. We picked the best sites to stream s16e18. 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 American Dad! Season 16 Episode 18 s16e18 at the top of the list.