Jane, Maura, and Frankie witness a sniper shooting at a Senator's rally. Jane receives a surprise visitor, and some shocking news.

Jane has to fight with the State Police over jurisdiction when the body of a young woman washes up on the beach.

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).

Dr. Isles becomes the suspect in the murder of a mysterious guest of a charitable fund-raiser.

The first day of Paddy's trail ends prematurely when a key witness is killed in a car crash. Maura learns more about Hope and Paddy, despite Hope's unwillingness to talk about the past.

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

A high school science teacher is killed in a hit and run, using the school's driver's ed car.

"Sports rage" and angry hockey parents are the focus of the investigation of the murder at a youth hockey game.

Jane and Maura are asked to speak about Hoyt at a seminar on serial killers for law enforcement. However, the scene they are are to use to demonstrate investigative technique is rather more real than expected.

Homicide investigates the death of a street racer. A friend of the Rizzoli's is a witness, but is less than helpful in the investigation.

A federal judge dies during a mock trial. Meanwhile, Jane worries about her mother's financial issues, which she still hasn't shared with her kids.

Two puzzling murders share a surprising link that could be the key to finding the perpetrators. Meanwhile, Jane and Casey come to a crossroad; and Maura becomes the caretaker for Patrick Doyle Sr. when he's released from prison.

The Boston Police department is haunted from the past when a man in a clown costume almost kidnaps a little boy. Is it the same person that has molested and kidnapped boys in the 1980s?

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.

A food truck owner, philanthropist and renowned chef collapses and dies while eating at his own truck. Tommy has some good news for the family.

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.