A stabbing death has Danny investigating a voodoo community. Garrett discusses a dark secret with Frank. Jack and Sean head out with Erin and Nicky for some trick or treating.
Danny helps out Erin by playing bodyguard to her key witness after he's almost killed in a hit and run. Jamie and Vinny bust a drug operation.
Danny's on the hunt when a Malaysian drug lord takes a recently decorated NYPD detective as his hostage. When Henry goes on a ride-along, Jamie is introduced to other ideas about how to do his job.moreless
Danny and Jackie's investigation into a drive-by murder is reassigned when they are needed to protect a central American president who's been targeted for assassination. Jamie begins to question his new partner's methods.moreless
When two separate murder victims are found to be part of a group charged with gang rape, Danny considers the possibility that the same person killed them both. Erin faces off in court against her ex-husband Jack Boyle.moreless
Danny and Jackie investigate when an injured woman recants after making a domestic violence claim against a councilman, who also happens to be a friend of Frank's. Danny has to adjust when Linda goes back to work.moreless
A dangerous criminal that Danny put away seeks his revenge by kidnapping Jackie. Jamie gets a new partner. A young officer accidentally shoots an innocent man.
Unbeknownst to his family, Frank must deal with a potential biological weapon's attack on New York City as they celebrate Mother's Day. Danny and Jamie's long standing dispute comes to a head.
The death of a free spending and extravagant investor looks suspicious to Danny and Jackie. Jamie is placed under house arrest when a hit is placed for "Jimmy Riordan".
Danny and Jackie discover a leak in the NYPD after an attempt is made on their witness in protective custody. Erin has a chance to work with Frank when she's offered the job as deputy mayor.moreless
When a 12-year-old boy insists Danny reinvestigate the suicide of his firefighter father, his gut tells him to listen. Jamie's heroic actions at a building fire have him concerned his undercover work could be put at risk.moreless
A gun buyback program has a "no questions asked" rule but when a gun returned is linked to a robbery, Danny must decide whether to follow the rule or arrest the suspect.
While Erin is prosecuting a murder case, the defendant's attorney is murdered. Danny is assigned to investigate but things get tense when Erin questions Danny on the stand.
A high-profile reporter, who happens to be a close friend of Frank's, is in town and almost assaulted. Jamie's undercover case reaches a critical stage.
Danny and Jackie investigate the murder of a Reagan family friend who was an undercover detective. Danny's family starts to worry as the persistent search takes an emotional toll on him.
After family is robbed and beaten and the assailant is shot and killed, the Reagans discuss how far they'd go to protect their family. Frank is conflicted with charges brought against a girl arrested at a rally when her identity is revealed.moreless
After a wealthy woman dies of a heart attack, Danny and Jackie must investigate when her daughter claims God told her that her stepfather actually murdered her mother. When the archbishop comes asking for Frank's support for the canonization of a local priest, Frank decides to check into a rumor about the priest back when he protested the Vietnam War.moreless
While out in the car with his family, Danny becomes involved in a shooting when a man running from a gunman crosses the path of the car. Frank says goodbye to an old partner and friend.moreless
When Bugs is nominated a Nobel Peace Prize, his new award leaves him with the need for a nice shelf to put it on, but his quest for a perch is easier said than done, and he encounters problems all along the way.moreless
Danny and Jackie investigate when a uniformed officer is seen fleeing the scene of a murder at a diner.
Danny and Erin must work together to find out who killed her informant.
To obtain leniency for his son, an ex-mobster helps Danny on some cold cases. Jamie is working undercover to find a secret about the Sanfino family.
Henry's heart attack on Thanksgiving eve leaves the family contemplating a future without him. While Danny and Jackie look into a suicide that may not be what it seems, Frank and the mayor disagree about a threat to the city.moreless
Daffy believes that he has finally found his true calling and decides to enroll in cosmetology school to learn how to become a hairdresser. Meanwhile, Porky tries to display rhythm while taking dance classes.moreless
When a killer starts targeting prostitutes, Jackie goes undercover as an escort. Erin meets a guy whose interests coincide with hers.
A political crisis ensues following a 911 call at a religious center. Jamie and Renzulli are injured when they attempt to enter the center to respond to the call.
Even while on a case, Danny tries to swing a romantic weekend with Linda. Jamie's undercover assignment involves a crime family.
Frank made an arrest in a rape case 18 years ago and Erin decides to reopen the case. Danny and Jackie have to deal with the murder of three teenagers for which there appears to be no motive.moreless
Danny discovers that a former cop is one of the men who attempted to rob a bank. Jamie gets a new partner.
Internal Affairs starts an investigation after Danny accidentally shoots a cop. The big question they look into is his personal state of mind at the time of the shooting.