Megan Anderson

When a witness who testified against D'Angelo Barksdale is discovered murdered, McNulty and the detail take the opportunity to link the killing to Avon Barksdale's drugs crew.

Herc's job with the mayor takes a hard turn; Prez prepares for his first day as a teacher; Carcetti drops a bombshell on the mayor during a televised debate.

Four West Baltimore boys wrestle with what to do with the rest of their summer vacation as the new school year approaches.

Brother Mouzone returns to Baltimore; Colvin puts off a reporter; Burrell delivers news to City Hall; Pearlman and Daniels plead their case.

Carcetti maps out a damage-control scenario, McNulty asks Landsman to pull police off the homeless case, Haynes' concerns about Templeton fall on deaf ears, and Dukie seeks out an old mentor for a loan.

Herc discovers a blast from the past, Omar grapples with guilt, Bunk receives a gift-wrapped surprise, and McNulty tracks Terri to Washington.