When did 24 Season 8 Episode 21 air?
24 Season 8 Episode 21 aired on May 10, 2010.


A lot can happen in a day.
Counterterrorism agent Jack Bauer fights the bad guys of the world, a day at a time. With each week's episode unfolding in real-time, "24" covers a single day in the life of Bauer each season.

With only four hours left, a rogue Jack Bauer stops at nothing to determine who is behind the day's most devastating events, and he uncovers an unexpected lead.
Direct answers for episode-level questions and details.
24 Season 8 Episode 21 aired on May 10, 2010.
This episode runs for approximately 45 minutes.
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