Blue Bloods — Characters & Cast

To maintain the integrity of the NYPD and protect his city and family without compromising his moral convictions.

Begins as a seasoned Police Commissioner carrying grief over the death of his son Joe and wife Mary. Over 14 seasons, he weathers multiple mayoral administrations, internal scandals, and shifting cultural perceptions of policing, growing into a revered elder statesman who places institutional integrity and moral duty above political expediency.

To bring immediate justice to victims and protect the innocent at all costs.

Starts as a volatile, decorated Iraq War veteran and first-grade detective prone to bending rules to capture criminals. Across the series—particularly following the tragic death of his wife Linda—he matures emotionally, learning restraint, developing deep vulnerability, and leaning on his partner Maria Baez while remaining the relentless protector of victims.

To ensure procedural justice is upheld and the law applies equally to all.

Navigates the legal arena as an Assistant District Attorney (and later Bureau Chief) while balancing single motherhood. Frequently forced to serve as the voice of procedural constraint against her brothers' policing methods, she wrestles with political ambition, ultimately prioritizing judicial fairness over high-office politics.

To serve the public directly on the ground with empathy and fairness.

Leaves a promising career as a Harvard Law graduate to join the NYPD as a patrol officer. He moves up the ranks from beat cop to sergeant and field intelligence officer, marrying his partner Eddie Janko while embodying the blend of legal acumen and street compassion.

To keep his family unified, honor police heritage, and remain useful in his golden years.

Serves as the spirited former commissioner whose mid-20th-century policing worldview contrasts with contemporary legal frameworks. Throughout the series, he provides Frank and the grandchildren with historical perspective and candid counsel.