To monitor the pulse on the street, Carcetti makes the rounds with members of the force. With Marimow on his case, Herc resorts to strong-arm tactics to retrieve his pinched camera, but Marlo isn't impressed. While Proposition Joe shows off his vocal range, Chris shows Snoop how to expose, and dispose of, New York infiltrators. At school, Prez struggles to fit a test-practice mandate into his curriculum, and Colvin figures out a way to involve Namond and other 'corner boys' in problem-solving. Not buying into Old Face Andre's account of a homicide, Bunk tries to convert Holley and Crutchfield to his way of thinking. A newly sober McNulty attends an Irish cop's wake--with a not-so-sober Bunk. Daniels gains the mayor's confidence, while Rawls confirms Burrell's suspicions of collusion. Randy finds himself on a short leash; Dukie learns that computer skills breed popularity; and Michael is dismayed by the unexpected return of a missing family member.