Melvin Jackson Jr.

Chris lets a neighborhood kid ride his bike, despite Julius's warnings, and he takes off with it.

Chris fails math but he changes the grade on his report card before showing it to his parents.Julius recovers from the gout by staying at home and watching soap operas.

Fed up with getting a daily butt kicking from his classmates, Chris asks Julius and Rochelle if he can attend the local middle school instead of Corleone Junior High, but when they say no, Chris tries to get himself expelled.

Responding to an officer's call for help, McNulty and Prez turn down the wrong alley, with unanticipated results. Under orders, a Barksdale crew violates the long-standing, but unspoken, Sunday truce with gunplay, increasing discontent among the New Day Co-op members. Stymied by the bureaucracy in his effort to open a gym, Cutty is surprised to find help from within Baltimore's power structure. Omar decides to go it alone against Avon and Stringer Bell, who are pressed by Brianna for some answers. Bubbles is wired up and sent into Amsterdam to help make the case against the Barksdale organization, while Pearlman and Daniels confront a cell-phone company over its foot-dragging on wiretap orders. Proposition Joe goes to Vinson in an effort to broker peace between Marlo and Avon, while a murder in Amsterdam presents new challenges and further divides the Western District troops and their allegiance to Colvin. Councilman Gray tells Carcetti he's running for mayor and offers him the council president's slot on his ticket.

Brother Mouzone returns to Baltimore on a mission of revenge and casts a wide net in his search for Omar, who has his own plan for vengeance. Colvin manages, for now, to put off a 'Sun' reporter inquiring about Amsterdam, while Burrell delivers news to City Hall, and the reaction is surprisingly mixed. Carver learns how much he doesn't know about good policing, while Pearlman and Daniels plead their case for a new kind of wiretap to Judge Daniel Phelan. Carcetti is about to launch his campaign, but struggles with its effect on his friendship with Council colleague Tony Gray. Stringer falls out of the loop with Avon and is given an ultimatum by Prop Joe and New Day Co-op crews. Cutty's initial approach to teaching boxing ends up alienating the corner boys, while Marlo raises the stakes against the Barksdale gang. Bubbles provides Freamon with entree into an undercover cell-phone hustle.