Watch Marvel's Avengers Assemble Season 5 Episode 19 Online. Best and Free Online streaming for Marvel's Avengers Assemble TV Show. We picked the best sites to stream s05e19. 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 Marvel's Avengers Assemble Season 5 Episode 19 s05e19 at the top of the list.