!['Brooklyn Nine-Nine' Sets Nathan Fillion for 'Castle' Role](http://townsquare.media/site/442/files/2017/02/brooklyn-nine-nine-nathan-fillion-castle-pic.jpg?w=980&q=75)
'Brooklyn Nine-Nine' Sets Nathan Fillion for 'Castle' Role
ABC’s Castle got a more abrupt ending than cast and crew were necessarily expecting, but Brooklyn Nine-Nine may give Nathan Fillion a little closure. The former Firefly star will guest star on the cop comedy’s fourth season in a role that should sound familiar to Richard Castle readers.