Tensions mount as the manhunt for the missing shooter proves to be more difficult than expected.
SFPD inspectors Terry English and Hildy Mulligan investigate a series of murders that could rip the city apart.
As the city reels from the school bus tragedy, Terry receives new evidence about the recent death of a cop, leading him to believe it may have been of a more insidious design.
When new evidence suggests an inspector was murdered, Terry fears it may be connected to someone within the Hall of Justice.
While the pressure mounts on Terry and Hildy to discover who's behind the cop-killings, an anonymous tip gives Raffi a potential connection for her case against Suger.
While Terry & Hildy investigate people in the department, Jamie digs into Dustin's past to understand him and Suger makes a shocking discovery when someone close to him disappears.
As an angry Suger prepares for war, the truth about Navarro leads Terry and Hildy to Mexico.
As Dustin Maker's trial begins with opening statements, Junior reveals new details which might finally give Hildy & Terry an upper hand in their investigation.
Terry and Hildy's investigation is dealt a lethal setback -- forcing them to close their case.
As Jamie deals with the fallout of her tirade, witnesses take the stand against Dustin.
Terry and Hildy take a high-ranking officer into custody, while Suger faces a new and unexpected threat.
Terry & Hildy close in on a murder suspect, while Fatty B lobbies to take Potrero in a new direction. And Dustin Maker's trial reaches a climactic verdict.
