As crime fiction writer turned crimefighter Richard Castle, Fillion has solved plenty of mysteries. At the end of last season, though, he seemed to have finally cracked his greatest case: how to finally get together with his police (and potential life) partner Det. Kate Beckett (Katic). And now that they’ve hooked up, TV’s sexiest crime solvers seem set for some serious undercover work. "Castle" Returns September 24 at 10/9c on ABC. Watch Full Episodes, Set Your DVR and Add to Queue here.
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