"Blue Bloods" is a successful police procedural show that follows the Reagan family, most of whom are involved in law enforcement. Tom Selleck plays Frank Reagan, the patriarch and police commissioner, while Danny Wahlberg plays his son, Detective Danny Reagan. The actors share a close bond similar to their on-screen father-son relationship. In an interview, Wahlberg described Selleck as a "solid individual" who pushes him to go above and beyond for the show. They rely on each other to make the scripts better and run through walls for the series. In a heartfelt Instagram post, Wahlberg wished Selleck a happy birthday and expressed gratitude for having him as a friend and father figure outside of the show.