Watch The Flash Season 5 Episode 21 online via TV Fanatic with over 5 options to watch the The Flash S5E21 full episode. Affiliates with free and paid streaming include Amazon, iTunes, Vudu, Netflix, and The CW.

Episode Details

On The Flash Season 5 Episode 21, the team is on high alert after Cicada II threatens to unleash a dangerous virus that would put all meta-humans at risk.


Unrated
Show:
The Flash
Season:
Episode Number:
21