Serija prati život obitelji Reagen, čija je glava obitelji Frank Reagan (Tom Selleck), policijski načelnik. Njegova kći Erin (Bridget Moynahan) je pomoćnik okružnog tužitelja, a sin Danny (Donnie Wahlberg) je viši detektiv. U obitelj su duboko utkani irski korijeni - domoljublje, strast i ljubav prema obitelji.
Uloge: Donnie Wahlberg, Bridget Moynahan, Will Estes, Len Cariou, Tom Selleck, Tony Terraciano, Andrew Terraciano, Sami Gayle, Amy Carlson, Abigail Hawk, Gregory Jbara, Marisa Ramirez, Robert Clohessy, Vanessa Ray, Jennifer Esposito, Nicholas Turturro, Steve Schirripa, David Ramsey, James Nuciforo, John Ventimiglia, Gameela Wright, Sebastian Sozzi, Stephen Sapienza, Matthew R. Staley, Laura Rothschild, Steve Rizzo, Craig Joseph Pisani, Jalesia Martinez, Collin Manley, Bob Leszczak, Edwin Ferrer, Susanna Farley, Frank Anello, Peter D. Singh Jr., Matthew Provenza, Tracey Lewis, Kathy-Ann Hart, Kevin K. Greene, Mahaleia Gray, Erika Gabriel, Christie Desir, Bill DeLorge, Domenico Del Giacco,
Uloge: Donnie Wahlberg, Bridget Moynahan, Will Estes, Len Cariou, Tom Selleck, Tony Terraciano, Andrew Terraciano, Sami Gayle, Amy Carlson, Abigail Hawk, Gregory Jbara, Marisa Ramirez, Robert Clohessy, Vanessa Ray, Jennifer Esposito, Nicholas Turturro, Steve Schirripa, David Ramsey, James Nuciforo, John Ventimiglia, Gameela Wright, Sebastian Sozzi, Stephen Sapienza, Matthew R. Staley, Laura Rothschild, Steve Rizzo, Craig Joseph Pisani, Jalesia Martinez, Collin Manley, Bob Leszczak, Edwin Ferrer, Susanna Farley, Frank Anello, Peter D. Singh Jr., Matthew Provenza, Tracey Lewis, Kathy-Ann Hart, Kevin K. Greene, Mahaleia Gray, Erika Gabriel, Christie Desir, Bill DeLorge, Domenico Del Giacco,
