When a woman finds her husband has been murdered, the ensuing investigation reveals that the victim may have been living a double life.

The squad works overtime hunting down a serial killer sniper. Maura befriends a witness to the crime, who happens to suffer from a mental condition that has him believing he is a wolf.

After a man is found bludgeoned to death on the side of the road, Jane and the squad team up with another detective who believes he is hunting the same roadside killer. Meanwhile, Maura discovers she has had her identity stolen and recruits Angela to help track down the culprit.

The squad is forced to join forces with an over-eager private investigator when a successful clothing designer is found poisoned and his wife reported missing. Jane notices Angela is spending too much money and asks Maura to teach her mom how to handle her finances.

When a severed human foot washes up on shore, the squad is called in to identify the victim and track down the murderer as more body parts are found. After an unsuccessful job hunt, Angela finds she enjoys helping out Korsak at the Dirty Robber.

After Jane jumps from a bridge to save a prosecutor suspected of his murdering his mistress, Maura is terrified that she has lost her best friend. The squad must now renew the search to find the real killer. Meanwhile, Angela enlists Frankie's help as she applies to new jobs.

Notable county prosecutor is arrested for murder, and as the case against him grows increasingly strong, Jane begins to doubt he did it. Angela nominates herself to educate Maura on the interests of kids today when she hears Maura is going to meet Jack's 12-year-old daughter.

In the middle of a heat wave, Jane and Maura find a man who died suspiciously in a bathtub full of ice. In trying to stay cool, Angela discovers a spicy tea that seems to be working, but it has unexpected romantic consequences.

The team helps Korsak investigate an old case that has gone very, very cold. Jane refuses to believe that she's not ready to go back on duty and takes some untraditional steps to stay involved.

Mummified remains of a woman put the team's investigative skills to the test. Jane works from her hospital room as she, with Maura's and her family's support, seeks to recover from a devastating loss.

The team races against time to find a young witness to the contract killing of a woman outside of a nightclub. Ultimately, Jane puts herself in the line of fire to save this witness' life.

The murder of a rare bookseller brings Jane and Maura into the world of Keltic writings and coded confessions, just as Maura is preparing Jane to meet her new man. Angela's relationship with Cavanaugh changes pace.

With Maura at a Medical Examiner's convention, Jane needs Susie's help and crime scene dioramas to solve the perfect murder. Meanwhile, Korsak is visited by the son of an old friend and forced to deal with painful unfinished business.

The team investigates the murder of a wealthy woman with terminal cancer and only a few months left to live. And when Maura teaches a class, she meets a man who might be her Mr. Right, but she is torn between the doubts of her scientific mind and the instincts of her heart.

When a man is found murdered inside his supposedly impenetrable doomsday fallout shelter, the squad must figure out how and why he was targeted. Jane finds it difficult to focus on the case when she discovers Korsak is looking into retirement and Frankie is keeping a secret of his own.

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.

Woman walks into the station covered in blood, carrying a gun, and saying she killed someone. Unfortunately, the trauma of what she did caused her to forget who she is or who the victim is. The team tries to unravel this bizarre case as they deal with the loss of close friend and colleague, Det. Barry Frost.

Solving the murder of a jogger takes on even greater urgency when Jane realizes that the motive was theft... of the woman's baby. As the investigation gets underway, Jane attempts to hide her pregnancy from her snooping mother, and Maura and Frankie face the aftermath of their kiss.