( Jennifer Esposito ): Danny’s detective partner. DVD & Physical Media Features
(Will Estes): A Harvard Law grad turned rookie cop. Blue Bloods - Season 1
: A season-long arc follows rookie cop Jamie Reagan (Will Estes) as he investigates a secret society of corrupt officers called the Blue Templar , who were responsible for the death of his brother, Joe. ( Jennifer Esposito ): Danny’s detective partner
(Len Cariou): Frank’s father and a retired Police Commissioner. Blue Bloods - Season 1
(Donnie Wahlberg): A hot-headed detective and Iraq War veteran.
: Each episode balances individual cases handled by Detective Danny Reagan ( Donnie Wahlberg ) and legal battles overseen by Assistant D.A. Erin Reagan-Boyle (Bridget Moynahan). Cast & Key Characters
(Tom Selleck): The Police Commissioner and family patriarch.