Season 3 Episode 21

Title: The Dead Pool
Air Date: April 11, 2011 at 10:00 PM PDT

When a champion swimmer and Olympic hopeful is found dead in a training pool, Castle and Beckett dive in to investigate his murder, and uncover myriad secrets that might have led to his death. Also in the episode, crime fiction authors Michael Connelly and Dennis Lehane guest star, offering Castle their insights into the case over a game of poker. Read the full recap here.

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