'... when it's not your turn.' - McNulty.

Baltimore homicide detective Jimmy McNulty gets into hot water and winds up assigned to a detail of narcotics outcasts charged with investigating drug lord Avon Barksdale and his powerful operation in Franklin Terrace. Meanwhile, Avon's nephew D'Angelo is fresh off beating a murder rap, but he finds himself demoted upon his return to the gang.

"The king stay the king." - D'Angelo.

The early-morning 'field interviews' by Herc, Carver and Prez result in a minor riot, a boy losing an eye and some bad publicity for the department. On the other side of the law, D'Angelo teaches Wallace and Bodie how to play the game (chess) and later impresses Bell with his 'take' from the low-rises.

"all in the game..." - Traditional West Baltimore.

Every crew has weak links--including Avon Barksdale's. With the heat turned up in the high-rises, Daniels and McNulty turn to a higher authority in an effort to crack the case wide open. Season finale.

'The world is a smaller place now.' -- The Greek

Bodie's effort to improve sales ends disastrously, forcing Bell to rethink his strategy. Ziggy pulls Johnny Fifty into a new caper that should make the Greeks pay off big. McNulty, undercover and outnumbered in the brothel, awaits 'rescue.' Daniels and Pearlman stay cool as Valcheck fumes over the change of targets--and Burrell pulls the rug out from under him.

'It pays to go with the union card every time.' -- Ziggy

The Detail uses satellite technology to its advantage. Bodie is unhappy that Proposition Joe's people are slinging on his turf, but business flows--until a new face arrives. Stringer Bell looks to an unlikely solution to the problem. Valcheck visits the FBI in an attempt to get real results on the docks. Ziggy's deal with Double-G goes bad in a big way.

'I need to get clean' -- Sobotka

With the clock ticking, the Detail makes a desperate move, and Daniels reams out Landsman for dropping the ball. Nick's deceit is in the open as Sobotka is overwhelmed by bad news. The Greeks ease out of an encounter with the Detail, and Omar's suspicions are validated. The Detail hopes to find Vondas's boss, and Nick hopes to repair relations with the Greeks.

'Business. Always business.' -- The Greek

The Detail has a setback, while Russell and Bunk revisit Philly to look for evidence. Brother Mouzone talks with Stringer Bell about their agreement, leaving Bell to contend with a dissatisfied Avon Barksdale. Bubbles and Johnny pull another caper and McNulty and Greggs return to the Westside, where they discover new connections.