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.

When Jane and Maura are asked to present the case of serial killer Charles Hoyt at a symposium for law enforcement, Jane worries that her greatest challenge will be facing bad memories. However, as she and Maura begin a simulation of investigating Hoyt’s murders, they soon come across a horrifying discovery. In a matter of moments, the team finds themselves drawn into a lethal game of cat and mouse with a new and terrifying serial killer.

When a food truck chef dies suddenly, all signs point to poisoning; Tommy announces some big plans; Maura's birth mother tries to make amends with her daughter.

Jane works to solve the murder of a jogger; Jane tries to hide her pregnancy from her mother; Maura and Frankie face the aftermath of their kiss.

While Maura is away at a convention, Jane needs Susie's help to solve a murder; Korsak is forced to deal with painful unfinished business.

Jane and Maura find a man who died in a bathtub full of ice; while trying to stay cool during a heatwave, Angela discovers a spicy tea that brings unexpected romantic consequences.