<Tr> <Th_colspan="2"> External links </Th> </Tr> <Tr> <Th> Website </Th> <Td> www.cbs.com/shows/blue_bloods/ </Td> </Tr> <P> Blue Bloods is an American police procedural drama series that airs on CBS . The series is filmed on location in New York City with occasional references to nearby suburbs . The series debuted on September 24, 2010, with episodes airing on Fridays following CSI: NY before being moved to Wednesdays at 10: 00 p.m. Eastern and Pacific time and 9: 00 p.m. Central and Mountain time for a four - week tryout . After four weeks, it returned to its original Friday 10: 00 p.m. Eastern time slot, where it has remained since . On March 23, 2017, CBS renewed the series for an eighth season . The season premiered on September 29, 2017 . </P> <P> The series follows the Reagan family of police officers with the New York City Police Department (NYPD). Francis Xavier "Frank" Reagan is the Police Commissioner . Frank's oldest son Danny is an NYPD detective, his youngest son Jamie is an NYPD police officer, and his daughter Erin is an assistant district attorney . Frank's middle son Joe was murdered by a crooked cop in the line of duty in events that pre-date the series, when he was involved with the Federal Bureau of Investigation (FBI) investigating a group of corrupt NYPD cops . Frank's father Henry is a former NYPD beat cop who rose through the ranks to Police Commissioner . Each member of the family represents a different aspect of police work or the legal process: Frank as the commissioner, Danny as the detective, Jamie as the beat cop and Erin as the prosecutor . Additionally, while each person's story might occasionally interweave with another's, the show also follows the professional relationships with their respective partners and colleagues . Frank with Garrett Moore, the NYPD Deputy Commissioner of Public Information and later Sid Gormley, the Special Assistant to the Commissioner; Danny with Detective Maria Baez; Jamie with Officer Edit "Eddie" Janko; and Erin with Detective Anthony Abetemarco in the DA's office . </P>

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