Murder in the First

Two students open fire on a school bus in the middle of the city; San Francisco's finest must work quickly to end a deadly shooting as one gunman is captured and the other escapes.

Tensions mount as the manhunt for the missing shooter proves to be difficult; Terry is promoted to acting Lieutenant.

A newly appointed district attorney promises justice for the victims of the school bus tragedy; Terry receives new evidence about the death of a cop; Hildy delves into the dangerous world of drugs and gang politics.

Raffi worries that Hildy's investigation of the grow house murder will impact her case; Dustin's defense team enlists the help of an acclaimed attorney; new evidence suggests that an inspector was murdered.

Terry and Hildy are pressured to discover who is behind the cop killings; Jamie makes an unexpected move in her defense of Dustin; Navarro reunites with his brother; Raffi gets an anonymous tip.

Terry and Hildy begin investigating people in their own department; Jamie looks into Dustin's past; Suger searches for answers as someone close to him disappears.

The truth about Navarro leads Terry and Hildy to Mexico; Suger prepares for war; Jamie uncovers a painful event from Dustin's childhood; Raffi's investigation takes an unexpected turn.

Junior reveals new details which may give Terry and Hildy the upper hand in their investigation; the trial of Dustin Maker begins; Suger gets new information about his sister.

Terry and Hildy's investigation is dealt a lethal setback; Raffi's loyalty is questioned; Suger contemplates the future of Potrero; the stress of the trial takes a toll on Jamie.

While Jamie deals with the fallout from her tirade, witnesses begin to take the stand in the case against Dustin; Hildy makes a vow when her family is threatened.

Terry and Hildy take a high-ranking officer into custody; Suger faces a new threat to Potrero; Molk uncovers unsettling information about a potential prostitution ring.

Terry and Hildy race to close in on a murder suspect; Fatty B lobbies to take Potrero in a new direction; a verdict is reached in Dustin's trial.