Cyrus Farmer

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.

Poot returns to the corner after a stint in prison--and is welcomed back by Herc and Dozerman. Carcetti engages in a testy budget battle with City Council President Campbell, rewards Daniels with a promotion, and hits a snag in his efforts to relieve Burrell of his duties. Bubbles fingers a witness for Herc, but the detective is slow to return the favor. While Prez is frustrated by the imposition of training for statewide tests in his curriculum, Colvin motivates his class by offering a dinner incentive to his student groups. Randy puts the math skills he's learned in class to work on the street; his success allows him to get Prez to bankroll his candy business. While Michael turns to Marlo for help with a problem, Old Face Andre turns to Proposition Joe for protection against Marlo.

Acting on Clay Davis's advice, Burrell seeks to burnish his reputation by ordering the department to double the number of street arrests. The mandate does not sit well with McNulty, who sets his sights instead on cracking a string of church robberies. Later, Davis shows he can play both sides of the political fence by making Carcetti an offer with long-term benefits for both. As the weather turns cold, school officials turn up the heat in Prez's classroom, and make it clear to Colvin that there are no exceptions to certain rules. After being apprehended, interrogated and released, Kevin is advised by Bodie to come clean about the incident to Marlo. Betrayed again by Herc, Bubbles decides to get even with the unwitting help of a local minister. Busted by Carver, Namond spends the night in the precinct, then is released to Colvin's home, where he proves, surprisingly, an exemplary guest. Donut's latest joyride ends badly; Randy is stigmatized at school; Chris takes care of Michael's problem.

After Reggie Wilson (Cyrus Farmer), a witness in a former case of Erin's, asks her for help shutting down a drug operation in his apartment building, she makes it her mission to make the building safe for his family. Also, while investigating a teen's suicide, Danny and Baez uncover information that suggests the death was a homicide, and Frank looks into potential misconduct in the Mayor's office.

Castle is captured and forced to work with strangers to solve deranged puzzles and mind games, while Beckett and the 12th Precinct race against time to rescue Castle and catch a killer.