VIDEO : Nathan Fillion Says Goodbye To Castle

(Photo: ABC) On Thursday, ABC announced several surprising cancellations in the programming lineup. One of the shows killed was the long running and beloved Castle. Series star Nathan Fillion took to Twitter to address the cancellation and thank the fans who stuck with the show and those who he had the pleasure of working with during its run. Thank you all. ? Nathan Fillion (@NathanFillion) May 13, 2016 Always the comic, Fillion seems a bit optimistic about his future.