Jane and Maura’s friendship suffers following the shooting of Maura’s biological father, gangster Paddy Doyle. Jane also finds herself in the middle of an Internal Affairs investigation. And her relationship with Agent Dean is exposed.

When a statue breaks open to reveal a dead woman inside, Jane and Maura must find the killer quickly as the body count begins to rise. Back at headquarters, a new homicide detective is named to the squad. Meanwhile, Dennis Rockmond returns to Boston after disappearing on Maura and tries to woo her back. Lydia goes into labor.

Tensions continue to mount between Jane and Maura, causing those close to them to be caught in the middle. But they must put aside their differences when they investigate the case of a college student who died in a tunnel. Meanwhile, Frankie Sr. returns with news that upsets Angela.

Dr. Hope Martin returns to ask Maura for a life-altering favor. Jane worries about the impending spinal surgery for Lt. Col. Casey Jones (guest star Chris Vance), and Tommy shows off baby T.J. But all gets shoved to the side when a building collapses, trapping loved ones inside.

A woman walks into the station and confesses to killing someone; the team tries to unravel a bizarre case while dealing with the loss of a colleague.

A bride is killed right before she walks down the aisle, and Jane and Maura must figure out if the groom’s ex-girlfriend is a suspect, or if there’s a deeper connection to the bride’s European roots. On the homefront, Jane has a new neighbor who captures the attention of Angela, Frankie and Frost.

A boy band star returns to his roots for a show and winds up murdered. Jane and Frankie, who grew up with the victim, work hard to solve the case. Meanwhile, Jane and Maura must decide if it’s time to tell Angela the truth about Lydia’s pregnancy just as Angela prepares to throw her a baby shower.

When a former college football player is stabbed inside a carwash during a fundraiser for his alma mater, Jane, Maura and the team must piece together clues to track down the killer. Meanwhile, Frost's mother visits Boston with some unexpected news. And Lt. Col. Casey Jones bumps into Jane and is forced to reveal some startling news of his own.

The facts don't add up when a dead man is found handcuffed in his home. As the Bon Voyage party approaches, everyone makes a video to say goodbye. In the series finale, everyone says farewell and plans for their next adventure.

After an undercover cop working a narcotics-smuggling sting is shot dead, the killers next turn their sites on Boston homicide headquarters, leaving Jane, Maura and Frankie Jr. trapped in a fight for survival on their home turf. It's a situation that will force Maura to challenge herself like never before. On the home front, Jane's parents are excited that their oldest child, Tommy, is being released after serving time in prison.

When an old watch is found inside a balloon of cocaine in a dead woman’s stomach, figuring out it’s significance becomes the key to protecting Jane -- and the people she loves.

A serial killer claims to have clues about the murder of another prisoner; Frankie Jr. prepares to take the detectives exam.

The virtual world and the real world collide when a microbrewer is killed. Angela tries to move on from a failed romance by seeing someone new. And Jane and the team begin to mentor underprivileged teenagers, a move that ends in near disaster.

Maura becomes the key suspect in a homicide case when Maura’s date turns up dead – and Maura can’t remember their evening together. As the shocking evidence against Maura piles up, Jane struggles between protecting her best friend and doing her job.

When Maura is abducted, nothing will stand in the way of Jane and the team bringing her home. Far away, Maura discovers a conspiracy that is bigger than just her kidnapping, with Jane as its ultimate target.

Jane goes under cover in a county jail to draw out a killer who committed a brutal murder.

When a warehouse fire kills a firefighter, Jane and Maura must investigate whether it was arson or an accident. But the investigation hits a snag when a hit-and-run leaves someone in the hospital. Guest star Billy Burke returns as FBI Agent Gabriel Dean, who hopes to rekindle his relationship with Jane. And guest star Jacqueline Bissett reprises her role as Maura’s mother, Constance Isles.

The murder of a crime tech sends shockwaves throughout the team. When suspicions arise that the tech had tampered with evidence for BPD cases, Maura is suspended from her position. Jane is determined to catch the killer and clear the department so Maura can be reinstated.

The Boston Marathon turns into a crime scene when a shooter begins targeting runners. Racing to catch the killer before another shooting, Jane and Maura must conduct their investigation in secret so as not to cause a mass panic.

On the first day of Paddy’s murder trial, Maura gains insight into her father from Hope. Korsak opens up about Cavanaugh’s tragic past. And in an unexpected twist, Maura must decide which side she’s on when she and Jane unravel a shocking secret about Paddy and Hope that affects them all.

The team works to solve a murder with explosive consequences; Ron offers to take Angela on a romantic getaway.

When a mailman is killed, the team must work with a brash, eccentric postal inspector, who believes the mailman's murder is part of a larger conspiracy. Maura continues to struggle with the ramifications of her injury, and Angela intervenes when she discovers Korsak has gotten Kiki a terrible birthday present.

When a bicyclist appears to spontaneously combust, Maura proves his death is actually a murder; Jane is invited to teach a class of FBI recruits at Quantico.

On the morning that Jane is supposed to testify in a murder trial, she discovers that a key piece of evidence has been stolen; Frankie decides to learn some magic tricks to impress Nina.

Jane and Maura work to solve two murders -- one from the past and one present day -- that have deep personal connections for Korsak. Jane gets a surprise visit that might lead to romance, and Maura gets upsetting feedback on her novel.