www.thedailyshow.com/watch/thu-august-11-2011/michael-wallis If Nathan Fillion gains weight in his role as author Richard Castle, he could become like real author Michael Wallis. Or better yet, Michael Wallis (born 1945) could play the role of Richard Castle's long gone father. According to the video clip from the Daily Show, Wallis is the actor who played the sheriff with the deep voice in Cars and Cars 2 - www.imdb.com/name/nm0909274/