The Boston Pilgrims baseball team is co-owned by a man and his estranged wife. Rizzoli and Dr. Isles probe the mysterious deaths of the team's coach and a star player. Tom Rizzoli, a home burglar now out on probation, is misunderstood.

22 year old Melissa finds her dock-working father's work place injury fishy. Her subsequent murder has the mob's M.O. But, an injured Doyle, the mobster and Isles' father, claims innocence. Rizzoli frowns on Isles' chess game with Tom.

Jane's younger brother Tommy seems to be settling down. He's getting work here and there and is moving into his own apartment. He still sees Maura from time to time but she would like to keep their relationship a platonic one. Meanwhile, the homicide squad investigates a bank robbery where the manager was shot by one of robbers for no apparent reason. They immediately cross swords with the FBI who also have jurisdiction and Det. Barry Frost in particular seems to have it in for the Special Agent in charge, Anna Farrell. This is the second robbery committed by these men and they soon find the getaway vehicle with one of the robbers inside, shot to death. It all becomes very personal for Jane when her brother Tommy's fingerprints are also found in the vehicle.

Jane and Maura still aren't on speaking terms but are forced to work together when a college student, 25 year-old Rachel Lawson, is found strangled in the university's underground tunnels. She had also been renting a car every weekend for the last 20 weeks and was aware that her parents has separated. She had also spent a good deal of money on yoga in recent months. The yoga master, Sensei Matta, has recently bought 20,000 acres in Western Massachusetts and has a secret - one that lead to the death of Rachel Lawson. Meanwhile, Jane is surprised when her father knocks on her door. He has big news: he's going to be remarried - to a 28 year-old - but wants a church wedding so needs to have his marriage to Angela annulled. Tommy, who introduced his Dad to the woman, is having his own particular problems with the nuptials.

Frankie's promotion to detective goes to someone the detectives have a history with. The man Maura saved in the morgue returns to a cold reception. The case of the week is a body encased in plaster on public display on a fountain and it's not the first or the last.

The murdered man is in AA with Vince's ex-wife-he is not her husband. He lost his high-paying job in a pharmaceutical company and now is just a lowly pharmaceutical rep with a conscience, a past, and a plan for redemption.

Hope is ready to talk to Maura about a kidney for Cailin. Jane pays an unannounced visit on Casey. A substandard building related to a murder investigation endangers Jane's friends.

Baby TJ's christening turns grim when a body is discovered in the church. Jane almost abuses her power in order to protect her brother Tommy (COLIN EGGLESFIELD).

A reclusive hoarder becomes the subject of an investigation into the murder of a city sanitation employee.

A mock trial advisor (A'DA ALISON WOOLFOLK) dies during a competition. Meanwhile, Jane is concerned that Angela may be hiding financial issues. DOUG SAVANT also guest stars.

A musician is stabbed in a bar and the squad realizes that the stabbing victim had something to hide. Jane's father returns with shocking news.

When a food truck chef dies suddenly, all signs point to a suspicious poisoning, but many questions remain unanswered. Meanwhile, Tommy announces some big plans that have Angela very excited. And Maura's birth mother, Hope, takes a bold step toward making amends with her daughter.

Homeland Security steps in when a senator's daughter is found murdered. The squad rushes to solve the case, which could put national security at risk. Meanwhile, Tommy and Frankie get into a fight after Tommy starts slipping back into bad old habits. And Jane reveals some shocking news that could change her life forever.

A killer is using online ads to find the perfect candidate for murder: men no one will notice are missing. Meanwhile, Jane discovers that keeping her pregnancy quiet will be a tough assignment.

A mortician's body is found in one of his own funeral home's caskets; Tommy visits with his son, TJ; Jane's loved ones react to her job news.

A mock trial advisor (A'DA ALISON WOOLFOLK) dies during a competition. Meanwhile, Jane is concerned that Angela may be hiding financial issues. DOUG SAVANT also guest stars.

Jane's younger brother Tommy seems to be settling down. He's getting work here and there and is moving into his own apartment. He still sees Maura from time to time but she would like to keep their relationship a platonic one. Meanwhile, the homicide squad investigates a bank robbery where the manager was shot by one of robbers for no apparent reason. They immediately cross swords with the FBI who also have jurisdiction and Det. Barry Frost in particular seems to have it in for the Special Agent in charge, Anna Farrell. This is the second robbery committed by these men and they soon find the getaway vehicle with one of the robbers inside, shot to death. It all becomes very personal for Jane when her brother Tommy's fingerprints are also found in the vehicle.

The murdered man is in AA with Vince's ex-wife-he is not her husband. He lost his high-paying job in a pharmaceutical company and now is just a lowly pharmaceutical rep with a conscience, a past, and a plan for redemption.

The Boston Pilgrims baseball team is co-owned by a man and his estranged wife. Rizzoli and Dr. Isles probe the mysterious deaths of the team's coach and a star player. Tom Rizzoli, a home burglar now out on probation, is misunderstood.

Hope is ready to talk to Maura about a kidney for Cailin. Jane pays an unannounced visit on Casey. A substandard building related to a murder investigation endangers Jane's friends.

Baby TJ's christening turns grim when a body is discovered in the church. Jane almost abuses her power in order to protect her brother Tommy (COLIN EGGLESFIELD).

22 year old Melissa finds her dock-working father's work place injury fishy. Her subsequent murder has the mob's M.O. But, an injured Doyle, the mobster and Isles' father, claims innocence. Rizzoli frowns on Isles' chess game with Tom.

Jane and Maura still aren't on speaking terms but are forced to work together when a college student, 25 year-old Rachel Lawson, is found strangled in the university's underground tunnels. She had also been renting a car every weekend for the last 20 weeks and was aware that her parents has separated. She had also spent a good deal of money on yoga in recent months. The yoga master, Sensei Matta, has recently bought 20,000 acres in Western Massachusetts and has a secret - one that lead to the death of Rachel Lawson. Meanwhile, Jane is surprised when her father knocks on her door. He has big news: he's going to be remarried - to a 28 year-old - but wants a church wedding so needs to have his marriage to Angela annulled. Tommy, who introduced his Dad to the woman, is having his own particular problems with the nuptials.

Frankie's promotion to detective goes to someone the detectives have a history with. The man Maura saved in the morgue returns to a cold reception. The case of the week is a body encased in plaster on public display on a fountain and it's not the first or the last.

A reclusive hoarder becomes the subject of an investigation into the murder of a city sanitation employee.