“ExtraTV.com” sat down with Bill Skarsgård, Sissy Spacek, Jane Levy and Melanie Lynskey as they promoted their new show “Castle Rock” at Comic-Con in San Diego. Bill teased the show, based on stories by Stephen King, saying, “It’s a spooky show. Things are not what they seem.” The cast also dished on their characters. “Castle Rock” premieres on Hulu July 25.