Watch The Flash Season 3 Episode 21 Online. Best and Free Online streaming for The Flash TV Show. We picked the best sites to stream s03e21. 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 The Flash Season 3 Episode 21 s03e21 at the top of the list.
Barry Allen is Savitar! He comes from 2054 from the voicemail he sends to the legends of tomorrow on the 4-night crossover. It's like Reverse Flash said " Now who is the villain flash ....... now who is the villain " or when Savitar told him " I am the future flash "