Daniel Fitzgerald “Danny” Reagan is the oldest child of Frank and Mary Reagan, and the older brother of Erin, Joe and Jamie. Danny is an investigator of New York City's 54th Precinct’s Detective Squad, specializing in Major Crimes, and doing what needs to be done to serve justice in the fight against crime.


Danny and his siblings grew up in Bay Ridge, Brooklyn. He was happily married to Linda from 1996-2017, and they have two sons, Jack and Sean. They lived in Staten Island, at 1712 Amboy Road until the house was firebombed. During high school, he dated Marianne Romano, who was described by his partner Maria Baez as “the queen bee, super good looking, a little crazy, and dynamite in the sack” to which he agreed. As a young man, Danny and Walter Harrison Beene worked construction.

For a class project of Nicky’s, Danny mentioned that when he was three, he wanted to be a fireman for Halloween, but his grandfather Henry swore that as long as he was alive, no Reagan would ever be a member of the New York City Fire Department. Henry then got him into a police uniform, and he “never took it off” until he made Detective.

Danny is a tireless worker and a highly skilled detective with keen instincts and years of experience who firmly believes that good old-fashioned police work is the best strategy to utilize when trying to catch a suspect. He has made more collars than any other detective in his precinct. His hard-nosed nature and short temper often exacerbates the situations and causes him to go above and beyond the rules to close cases by taking advantage of his power, and he has a tendency to act brutal towards the criminals he collars, a tactic that is almost criminal itself, - which, in turn, makes it harder to bring a clear case against them in court, and sometimes gets him suspended. For example, in one episode he held a suspect over the edge of a building and threatened to let him fall if the suspect didn't "come clean". Danny's old-school, authoritarian style clashes with those of his more moderate, fair siblings Jamie and (even more so) Erin. It also occasionally causes rifts between him and Linda, who becomes concerned and angry when Danny becomes unwilling to drop certain cases.

However, above all Danny is devoted to his family; many of the situations in which he most significantly loses his temper are when others have threatened his siblings, wife or children. Despite his gruff and aggressive nature, Danny is quick to sympathize with others and easily talked into action or taking on a case, regardless of circumstances. Outwardly he is self-assured to the point of arrogance and quick to assert his authority, yet Danny has been shown to be insecure and self-doubting, referring to himself as just a grunt on one notable occasion. He was close with his late brother, Joe.

Physical Characteristics

Danny is 5'10" (177cm)[1][2], approximately 160lbs (72.5kg)[3], and physically fit with hazel eyes. In most lighting his hair is brown. He has a pronounced widows peak and prefers to keep his hair cut very short. While most of the family are right handed, Danny has the distinction of being a lefty.

Distinguishing Marks

Danny has two tattos: Semper Fi over his heart, and a faded emblem on his shoulder.[4]


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. Danny saw combat in Fallujah, and was the only member of his platoon to come home alive (resulting in some post-traumatic stress). During his time in the Marines, Danny was decorated for heroism.

He is old-school; his hotheadedness and harsh methods of detective work sometimes get him in trouble, which his father worries about. When asked if his son “crosses the line” and violates procedure from time to time, Frank answered, “I think he walks on the line.” Danny is hard on other policemen and detectives when he feels they are unprofessional or not doing their duty to its utmost. He is currently assigned to the Detective Squad of the 54th Precinct, and partnered with Det. Maria Baez. It is mentioned that he leads the Manhattan South Detective Borough in both collars and complaints[5]. In “Love Stories”, he and Baez are awarded the NYPD Medal for Valor for their actions in “Partners”.


As a detective with the NYPD, Danny carries a Kahr K9 in 9×19mm as his duty weapon. He also owns a Glock 19 in 9×19mm, and previously used a Smith & Wesson 5946 in 9×19mm. Originally he drove an eighth generation (model year 2000-2005) blue Chevy Impala, plates ANO-2594 which changed to ANO-2595 between Episodes 10 and 11 of Season 2. Between Seasons 3 and 4 their assigned car changes to a new model grey Dodge Charger, plates NUQ-1724.

Danny's personal vehicle is a first generation (model year 1993-1998) dark green Jeep Grand Cherokee, plates AOC-8963 (Pilot) which changed to AWQ-2538. The Jeep was shot a few times and recently replaced with a fourth generation (model year 2006-2010) silver Ford Explorer XLT, plates SQR-5635.


Over his career, Danny has had numerous partners to the point even he acknowledges that he burns through partners and gets very protective of the ones who stick around.

  • Detective Demarcus King (Season 1 Episode 1)
  • Detective 3rd Grade Ava Hotchkiss (Season 1 Episodes 2, 3, and 5) was his first partner at Major Case and initially they did not get along.[6]
  • Detective 1st Grade Jackie Curatola – From Season 1 Episode 4 (2010) until Season 3 episode 7 (2012). In 2012, Jackie took early retirement from the NYPD after starting to show signs of burning out.
  • Detective Kate Lansing – Assigned to replace Detective Curatola in 2012 (Season 3 Episode 7), Detective Lansing worked with Danny for almost three months. She transferred back to Internal Affairs after the arrest of Captain Derek Elwood, who framed Danny for possession of narcotics in order to prevent the discovery of his gambling problem[7].
  • Detective Candice “Mac” McElroy – A temporary addition to the 54th Precinct, Detective Candice McElroy briefly served as Danny’s partner in 2013.
  • Detective Maria Baez – Danny’s partner since 2013 (Season 3 Episode 17). Detective Baez previously spent three years with the NYPD’s Joint Bank Robbery Task Force until it was disbanded in 2011.

Awards and Decorations

The following are the medals and service awards fictionally worn by Detective Reagan on his dress uniform.

  • American Flag Breast Bar
  • World Trade Center Breast Bar
  • NYPD Medal of Honor
  • NYPD Combat Cross, w/1 gold award star (2nd award)
  • NYPD Medal for Valor
  • NYPD Commendation or Commendation—Integrity
  • NYPD Meritorious Police Duty

Officer-involved shootings


  • Danny once took out a suspect by throwing an umbrella[8]


  • In 2x14 Danny says he's been married 12 years but in 3x04 he says they are celebrating their 16th Wedding Anniversary.


  1. Season 2 Episode 9 "Moonlighting"
  2. [1]IMDB Donnie Wahlberg
  3. Season 2 Episode 9 "Moonlighting"
  4. The tattoo on the shoulder is Donnie Wahlberg's real tattoo. Though faded, artists have tweaked it to bring it back to life. Part of the crest-like tattoo appears to bear his last name. It is unknown if the producers decided not to cover it due to it's faded illegibility or if there was a explanation created for what it is to Danny.
  5. Season 5 Episode 6 "Most Wanted"
  6. Season 1 Episode 2 "Samaritan" Deleted Scenes
  7. Season 3 Episode 12 "Framed"
  8. Season 1 Episode 3 "Privilege"