Nathan Fillion had this to say about the 'Castle' series finale, which served an ending to audiences not many were satisfied with.

Actor Nathan Fillion wasn’t out of work for too long after the Castle series finale. He migrated to another hit show in The Rookie, whose success matched and perhaps even surpassed Castle’s. But ...

ABC’s Castle may have had a dramatic cancellation, but that hasn’t stopped fans from loving the show. The series is now streaming completely for free. Starring Nathan Fillion and Stana Katic, the ...