"Blue Bloods" has become a long-running and successful police procedural show on CBS, with over 300 episodes and 13 seasons. The key to its success lies in its solid characters and character-driven storytelling, as noted by star Tom Selleck. The cast members have a great time working on the show, evident from their blooper reels. Among them, Donnie Wahlberg is considered the biggest clown on set, often making the most mistakes during filming. However, this lightheartedness is a necessary break from the dark subject matter they deal with on the show.