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

After taking a bullet in the Season Finale during a siege of the precinct, Jane Rizzoli is honored as a hero at a public event. The celebration is short-lived, however, when disaster strikes. The ensuing case reunites Jane with an old high-school flame, Sgt. Major Casey Jones, who may be just the person she needs to heal her emotional scars.

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.

The world of competitive dance turns deadly when the mother of a star performer is stabbed to death at a competition. Jane and the team search for clues, but they soon realize something is off about the woman’s history. Korsak has his hands full when his stepson is accused of shooting a cop. Guest star Lolita Davidovich returns as Korsak’s ex-wife Melody.

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.

When a 16-year-old girl is murdered and left in a cage, Jane and Maura must overcome the ethical dilemma of a psychiatrist and the stiff opposition of a fussy prosecutor to find the killer. Meanwhile, Jane has couch issues, and Frankie is seeing UFOs.

When the jeweler to Boston's super cool and famous dies, the investigation leads us to a member of the Isles family. That leads to a secret Maura has been keeping for almost all of her life.

The murder of a college student takes an odd turn when Jane and Maura discover he had 32 girlfriends. Uncovering who killed him and why leads them into a world of app developers, virtual boyfriends and relationships built on lies. Meanwhile, Korsak finally introduces everyone to the new woman in his life.

When a dog trainer is found dead at home, her champion Rottweiler is the prime suspect. As the team investigates this unlikely killer, Maura has a peculiar interaction with Kent.

After a body turns up in Boston with links to another murder in Los Angeles, Jane and Maura pack up their sunscreen and hop on a plane. With the girls out of town, Angela and Korsak plan a double date with Kiki and Ron.

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 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.

Jane and Maura investigate after the coach of the Boston Pilgrims baseball team is found dead in the locker room. The death comes as a star player and the team owners battle for control of the team. Meanwhile, Jane's brother Tommy returns home after being released from jail.

A Revolutionary War re-enactment becomes the scene of a real killing when a soldier turns up dead. Maura's extensive knowledge of American history becomes important as she and Jane try to solve the case. And Maura's brilliant mother, Constance Isles, comes to Boston for an art exhibit.

Jane and the team investigate what appears to be a modern-day witch hunt in Salem. Meanwhile, Frankie's old girlfriend returns to town with a surprise, and Jane has no problem speaking her mind about the situation.

Jane and Maura investigate a family's background when a man is killed; Jane suspects that Maura is hiding something.

When a young dockworker is found dead, the team discovers that there are mob connections; Jane tries to avoid sensitivity training; Maura starts spending time with Jane's brother.

The shooting of a community activist brings out a witness who's willing to testify. TV host Bill O'Reilly airs his disapproval of the police department.

Boston Homicide teams up with the FBI after a bank manager is shot during a robbery. Jane’s brother Tommy may be facing more trouble just as his relationship with Maura begins to grow. Tessa Thompson guest-stars as by-the-book FBI Agent Anna Farrell, who has a complicated history with Detective Frost.

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.

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.