Nathan Fillion Signs up for More 'Castle'

Despite not yet getting a new season renewel, Nathan Fillion has signed up for an eighth season of 'Castle'

Although the show has continued to suffer this season with dropping ratings, it's still likely that 'Castle' will be renewed, possible for a final season. Another twist in the tale is that showrunner David Amann has 'stepped down' after only one season as he replaced series creator Andrew Marlowe last season. No word on a replacement yet