Frank is the younger son of Henry (Len Cariou) and Betty Reagan, born in Bay Ridge, Brooklyn, New York in the early 1950s.
Paula visits Frank and reveals the news in an effort to get her son, a young detective in the firearms unit, assigned to a less dangerous precinct.
On the job for 15 years (as of season 1), Danny took a leave of absence from the New York City Police Department to serve two tours in the Iraq War as a Marine.
[19] Erin is on the short list to become District Attorney in the season 11 episode "In the Name of the Father", after her boss, DA Samar Chatwell, is arrested on corruption charges.
[21] He is described in one source as "grizzled family patriarch Henry Reagan, a retired NYPD police commissioner who saw military action in World War II and Korea".
Henry's childhood was hard due to his father, Charles, an Irish immigrant, World War I veteran and former police officer, being an alcoholic and unable to hold a job.
[23] In "Stomping Grounds", it was mentioned that Henry, during his days as a Detective with the Vice Squad, transferred out of the unit when he started to see every woman on the street as a hooker.
Jamie's partner and eventual wife, Officer Edit Marie[31] "Eddie" Janko Reagan (first name pronounced "eh-DEET[32]") is of mixed Hungarian and Serbian descent.
[33] Her Hungarian-born father, Armin Janko (Michael Cullen), was a financial advisor before his company was revealed to be involved in a Ponzi scheme, ruining a lot of good people.
In Season 9 Episode 1 "Playing With Fire", however, after Frank contemplates issuing an official written rule because of his concerns for such an arrangement, Eddie tells Jamie that all she wants is for them to be a couple.
Despite this, she quickly changes her mind after visiting Jamie at the 29th while in civilian clothes and overhearing several patrol officers disparaging him in his absence, as well as hearing from some of the other transferees how rough their new assignment at the 29th is.
Eddie subsequently partnered with Officer Rachel Witten (Lauren Patten), whom Frank had dismissed for racial profiling and then reinstated after a few months.
The Season 9 finale, "Something Blue", ends at the start of the wedding Mass with Archbishop Kearns (Stacy Keach) officiating; as Armin remains incarcerated, Frank walks Eddie down the aisle at her request.
In "Manhattan Queens", Baker was harassed by Suffolk County Police Department Deputy Chief Sam DeLuca, who had a romantic interest in her.
In "By Hook or by Crook", Brian is shot and critically wounded by a drug dealer who was released on bail after a murder conviction in Mexico was missed by a background check.
Brian recovers, but in "True Blue", he shows signs of PTSD, which strains their marriage, and he is suspended and investigated by Internal Affairs after being caught on camera roughing up a suspect he was arresting.
He lives in New Hyde Park with his wife, Sheila (Cady Huffman), has a son Brendan, a currently unnamed daughter, and, according to the certificate in his office, is a graduate of New York University.
[52] In "This Way Out", he's shot in an assassination attempt during a town hall meeting by a mentally-challenged teenager who was tricked by a member of the Los Lordes gang operating out of the Bitterman Housing Projects.
He does add one condition: that Frank replaces Garrett Moore as DCPI with a more hardline deputy commissioner from a list of candidates provided by Chase.
In the season 4 finale, Peterson tells Commissioner Reagan about her intent to resign, after finding that she does not have enough "professional animosity" toward the NYPD due to becoming too close to Frank.
In "With Friends Like These" (Season 6 Episode 4), a brawl between police and firefighters at a crime scene escalates into open unwillingness of both departments to cooperate with each other.
Detective 1st Grade Jackie Curatola was Danny's previous partner; she is divorced and is regularly the recipient of passes or ogling from her uniformed colleagues and perps alike, much to her annoyance.
She transferred back to Internal Affairs after the arrest of Captain Derek Elwood (Nestor Serrano), who framed Danny for possession of narcotics in order to prevent him from discovering his gambling problem.
[24] Before transferring to the 54th Precinct, Maria fell hard for Detective Jimmy Mosely (Johnathon Schaech), but their relationship fizzled out when he refused to leave his wife for her.
In the season 12 finale "Silver Linings", Baez adopts a newborn baby girl, whose biological mother Elena Marquez was assassinated with a bomb on the orders of Arturo Muñoz, whom she was testifying against.
When Erin finds the case in a cold-case pile, she runs DNA found at the scene, which reveals what McBride already suspected but was afraid to confirm: that his father had been responsible.
He is married, and has a side job painting to make extra money; he is also a gambler, but quit after Frank bailed him out of a $3,000 debt (with it made clear that this is a one-time offer).
Captain Robert Espinoza is the Commander of the 29th Precinct and Jamie's immediate superior starting in Season 9 Episode 2 "Meet the New Boss", who requested his assignment as new blood to help clean out corruption in the ranks of the patrol officers.
An obnoxious community social-activist preacher, who feels it is his duty to protect people of color (particularly those in his neighborhood) from the brutality and racial profiling of the NYPD.
Potter, seeking to further his own agenda, relocated a young witness and his entire illegal family, and demanded to Commissioner Reagan to have his son take an early retirement.