The series follows the Irish-American Reagan family of police officers with the New York City Police Department.
Francis "Frank" Reagan is the Police Commissioner. He was a U.S. Marine and a Vietnam veteran before he joined the NYPD.
He is a widower who lost a son, Joe, "in-the-line-of-duty," leaving him three remaining adult children—Danny, Erin, and Jamie.
Season one kicks off with the Reagan’s weighing the rights and wrongs of vigilantism when a good Samaritan who has a police record takes action against a terrorizing subway criminal.
- Donnie Wahlberg
- Bridget Moynahan
- Will Estes
- Len Cariou
- Tom Selleck
- Amy Carlson