Kevin T. McCarthy

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.

Sarah, Tommy and Saul make a crucial mistake while trying to retrieve funds to save the family business; Nora overcompensates over the holidays.

The team reopens the 1953 murder case of a 19-year-old aspiring rock 'n' roller when new evidence suggests he was not killed where his body was found.