Joe Urla

The team try to find a bike messenger who has kept a video diary of his troubles with women, before he can commit another violent act. The new deputy chief calls Benson's leadership into question.

As McNulty and the detail continue to stake out Marlo's crew, newly elected Mayor Carcetti is finding he is stuck between keeping his promises on education and his promises on law and order.

Marlo takes care of some unfinished business and strikes a deal with Avon Barksdale. Meanwhile, Mayor Carcetti's Chief of Staff blames Royce for the Campbell revelation.

Baltimore's renewed police commitment brings fresh recruits to Daniels and Carcetti is forced to make a dangerous political deal. Meanwhile, Haynes approaches Templeton about his sources.