During a series of rolling blackouts, the team tracks a serial killer in Los Angeles who targets families.
The team investigates the murder of a wealthy woman with terminal cancer; Maura meets a man while teaching a class.
A popular high-school teacher is killed in a hit and run; Jane is preoccupied with Lt. Martinez's apparent favoritism toward his own drug unit.
A statue breaks open to reveal a dead woman inside; the squad gets a new homicide detective; Dennis Rockmond returns to Boston and tries to woo Maura; Lydia goes into labor.
Jane and Maura must piece together clues when the bodies of young women dressed as dolls are found on the public transit system; Angela makes changes at the cafe; Jane learns more about Casey's injury.