When did The Flash Season 4 Episode 21 air?
The Flash Season 4 Episode 21 aired on May 8, 2018.


The fastest man alive.
After being struck by lightning, CSI investigator Barry Allen awakens from a nine-month coma to discover he has been granted the gift of super speed. Teaming up with S.T.A.R. Labs, Barry takes on the persona of The Flash, the Fastest Man Alive, to protect his city.

With DeVoe's Enlightenment device nearly complete, in order to disable it The Flash and his team must put their faith in an unlikely ally – Amunet Black. Meanwhile, Harry hits an all-time low when the "Council of Wells" kicks him out but then Cisco introduces him to the "Council of Harrisons."
Direct answers for episode-level questions and details.
The Flash Season 4 Episode 21 aired on May 8, 2018.
This episode runs for approximately 42 minutes.
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