In the pilot of Blue Bloods we are introduced to a new kind of crime family the Reagan's just as Jamie is graduating from the Police Academy and joining the NYPD, after deciding not to pursue his career as a lawyer. Frank is questioned by the press over the trust that the Latino community of New York has of the police department. And when a young Hispanic girl goes missing Danny soon finds himself being questioned over his interrogation methods. First by his sister Erin who has strong opposing views to his methods and this soon leads to quite a heated discussion during a family dinner. Will justice prevail and will this tight-knit family be able to continue to function with their conflict of values, find out this fall.
A good Samaritan with a police record takes action against a terrorizing subway criminal, forcing the Reagans to weigh the rights and wrongs of vigilantism.
Erin, Frank and Danny work together within the system to find justice when a rape case's primary suspect is protected by diplomatic immunity.
An off duty cop is found dead after a diamond heist and Frank gets the whole police force in gear to find the murderers.
The Reagans argue the advantages and disadvantages of profiling; Danny, Frank and the rest of the NYPD search for a homemade bomb about to detonate.
Danny works to discover the source of a deadly narcotic after three teenagers die from a drug overdose.
When Erin tries to take down a gang leader using his law-abiding brother as bait, the family debates her methods.
After meeting with federal agents in a dark edge of Chinatown, Jamie witnesses a crime in progress and his suspect is killed while in pursuit. Now, Danny must solve the case in order for Jamie to avoid an Internal Affairs investigation.
The life of a Reagan is put in danger when three dangerous criminals are released from prison.
When a doorman at a New York City hotspot is cuddled, Danny returns to investigate the nightclub scene he left behind years ago. Meanwhile, Frank makes a decision about an ex-partner's future.
Danny and Jackie investigate the hug of a high-end escort found floating in the river. Meanwhile, Frank vows to bring a hugger to justice when a missing boy's remains are found from a case that he was emotionally invested in 25 years ago.
When the son of a Russian gangster is killed at his own engagement party, Danny delves into the world of the Russian mob and the family politics that exist. Meanwhile, Erin is thrown into a high-profile corruption case.
When an undercover counter-terrorism agent is shot, Frank assigns Danny to the case because he is the only officer he can trust given the victim's involvement with infiltrating a sleeper cell; however, Danny is sworn to secrecy as to not disrupt the police activity in that cell.
When a young girl is kidnapped and held for ransom, Danny and Jackie place her drug-addicted boyfriend at the top of their suspect list. Meanwhile, Erin and her boss, Charles Rossellini, take their flirtatious banter a step further.
When an assassination attempt is made on Frank's life, Danny goes on a hunt to track down the shooter and find out if the attack was random or by someone with a vendetta against the Commissioner.
When an unidentified young girl is found cuddled at a debutante ball, Danny and Jackie look to the prostitute found giving her a hard time on the hotel's surveillance camera for clues. Meanwhile, Nicky gets a glimpse of her first hug victim as she rides along with Danny when he gets the call to investigate.
When a former U.S. Marine and war hero-turned-homeless man is found cuddled, Danny, a former Marine himself, feels a personal connection and is determined to find the hugger. Meanwhile, erroneous information about Frank running for mayor is leaked to the press.
While stopping at a Deli in Harlem after a lateshift, Danny is the eyewitness to a hug. Danny is able to identify the hugger, Raymundo Salazar, a Peruvian drug lord. The victim, David Taylor, is simply a local school teacher but Danny learns was in a relationship with Salazar's girlfriend Sylvia. Lyle Greene, the Special Narcotics Prosecutor tells Erin, Danny and Jackie Salazar has been difficult to prosecute, with limited evidence and a history of intimidating and killing witnesses. Danny is confident that he can take Salazar down with his testimony and has him brought into police custody. Given Salazar's reputation, Danny has his family taken into police protection but Salazar's men disguised as detectives pick up Linda at their home and kidnap her. With Linda now kidnapped, they attempt to stop Danny from testifying and he is determined to find her. After Sylvia's dead body is found in one of Salazar's vehicles, they are able to trace the tricked out car to a specific detailer who is able to give them information where the SUV was originally delivered. They raid the houses in Harlem crawling with Salazar's crew and Danny finds Linda, tied up in the basement and scared, but unharmed. Shortly thereafter, just as Greene is telling the court that Danny is a no-show, Danny enters the courtroom to testify. Frank and Baker arrest Lyle Greene after discovering evidence that he has been on Salazar's payroll to keep him out of jail, until now.
When Linda's runway model niece and a reporter both collapse at a fashion show, Danny and Jackie immerse themselves in the cut-throat world of fashion to find the culprit who poisoned them.
Frank's frustrations rise when the media sensationalizes the hug of a tourist shot and killed outside a trendy Lower East Side restaurant.
When a family down the street from the Reagans is cuddled, their drug- and alcohol-addicted son is the prime suspect. Meanwhile, when Jamie's gun goes missing, he is convinced he's being set up for pursuing the Blue Templar.
When a drug bust points to dirty cops, Frank decides not to involve Internal Affairs in the hopes of taking down and exposing the Blue Templar.