Carcetti spends time in the homicide department, while at the school Prez hits a wall and Colvin makes a breakthrough with the corner kids.
With Burrell's help, Daniels opens up the row houses and the reality of the city's drug trade hits the headlines. Season finale.
At the Baltimore Sun, city editor Gus questions Scott's sources. Meanwhile, Bunk is horrified by McNulty's actions at a crime scene.
Marlo meets Vondas, who shows him some tricks of the trade. Meanwhile, McNulty's serial killer makes front-page news.
The penultimate episode of the crime epic. Marlo sends Snoop to collect Michael, who grows suspicious over their intentions.