CBS's long-running police procedural drama "Blue Bloods" faces unique challenges in keeping the show fresh and engaging. Showrunner Kevin Wade describes the show as a "closed-end procedural" without serialized stories or cast replacements. Despite not relying on real-world headlines, the show aims to tell fresh stories while exploring deeper layers of its existing characters. Wade emphasizes the importance of providing material for the talented cast members to sink their teeth into. Now in its 13th season, "Blue Bloods" continues to captivate audiences.