Castle Season 3 Finale Promo: Who Killed Johanna Beckett?

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Coming off a decent, albeit not spectacular episode, Castle will air its third season finale next Monday.

Titled "Knockout," the hour will bring to the forefront new intel on the murder of Beckett's mother. Information comes to light for this detective when a hitman with knowledge of the crime escapes during a court hearing.

How will the episode turn dark? On what cliffhanger will it conclude? Tune in on May 16 and get excited for the finale via the following official preview:

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Castle Quotes

Sometimes the hardest things in life are the things most worth doing.

Castle

The moment we met my life became extraordinary. You taught me more about myself than I knew there was to learn. You are the joy in my heart. You are the last person I want to see every night before I close my eyes. I love you Katherine Beckett and the mystery of you is the one I want to spend the rest of my life exploring. I promise to love you, to be your friend and your partner in crime and life till death do us part and for the time of our lives.

Rick Castle