Castle Season 4 Two-Part Episode Spoiler: Nathan Fillion Wears a Wetsuit!

We're beyond excited for Castle's two-part episode arc beginning on February 13 with Episode 15, "Pandora," and ending on February 20 with Episode 16, "Linchpin."So far, we know that Rick Castle and Kate Beckett will pursue a ruthless killer who is part of an international conspiracy. Guest star Jennifer Beals will play Sofia Conrad, a sexy CIA operative, and Josh Stamberg will join the cast as intelligence officer Martin Danberg.Keeping in Castle tradition, "Pandora" and "Linchpin" will feature...


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