A woman, 75, seeks justice for her murdered son, who was the victim of a gay-bashing incident in 1963.
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.
Dr. Bobolit makes Christian an offer he cannot refuse; Julia discovers Jude may not be the person he appears to be; Sean takes the next step in his relationship with Megan O'Hara; Liz helps Sofia Lopez.
Ben reveals the details of his past to his therapist and his training officer; when Dewey (C. Thomas Howell) is star-struck by a famous, self-absorbed actor (Tom Sizemore), he decides to party with him instead of booking him.
Medavoy and Jones suspect a Pakistani girl was murdered by her father to "save face"; a married insurance adjuster is suspected of stabbing a transvestite prostitute.