Dan Stevens
as
Detective Inspector Jett Howards
Will Estes
as
Jameson "Jamie" Henry Reagan
Tom Selleck
as
Police Commissioner Francis "Frank" Reagan
Donnie Whalberg
as
Daniel "Danny" Fitzgerald Reagan
Bridget Moynahan
as
Assisstant District Attorney Erin Reagan
Len Cariou
as
Retired Police Commissioner Henry Reagan
Amy Carlson
as
Linda Reagan
Vanessa Ray
as
Officer Edit "Eddie" Marie Janko
Sami Gayle
as
Nicole "Nicky" Reagan-Boyle
Tony Terraciano
as
Jack Reagan
Andrew Terraciano
as
Sean Reagan