After a young dockworker is killed, evidence surfaces that the mob has connections to dock operations, which brings up questions regarding involvement by Maura's biological father. Jane does everything she can to get out of sensitivity training. Meanwhile, Maura and Tommy start spending time together.
In the thrilling season finale, Callie's hospital is on lockdown when a pair of ex-con brothers take hostages. Longworth and Callie work together to ensure the safety of the hostages, but things take a turn for the worst leaving Longworth to defuse the situation before it explodes.