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When someone starts using his books as the blueprints for brutal murders, a mystery novelist begins assisting the NYPD with some of their homicide cases, whether they want his help or not.

Starring: Nathan Fillion, Jon Huertas, Seamus Dever, Stana Katic

Episodes are available for 28 days.

Please note that Castle is only available to watch on desktop or laptop computers and is unavailable on mobile and tablet. This is because we do not have the rights to show the program on mobile devices. Apologies for any inconvenience caused.

An offer forces Beckett to reconsider what she wants out of her job and relationship with Castle. Meanwhile, the body of a young woman is found floating inside the water tank of a skid row flop house.

As Castle and Alexis travel to London, their routine flight turns deadly when the plane's air marshal is found murdered. Can they find the killer before he carries out his fateful plan?

When Homeland Security inexplicably seals the crime scene of a car bombing, Castle and Beckett find themselves with two mysteries on their hands.

A mysterious recurring dream drives Castle and Beckett to seek answers about the two-month period when he went missing. But their search for the truth has deadly consequences.

When Beckett is assigned to protect Erik Vaughn, a charming billionaire entrepreneur whose life is in danger, she's forced to reflect on her relationship with Castle.