CBS' "Blue Bloods" has defied expectations by lasting for 13 seasons and lead star Donnie Wahlberg is grateful for its longevity. Wahlberg believes the show's focus on family sets it apart from other police procedurals. He appreciates that "Blue Bloods" portrays police officers going home and spending time with their families, which adds an intimate and relatable aspect to the series. Wahlberg is amazed by the show's success and credits a combination of luck and audience support for its enduring popularity.