McNulty, reassigned to the marine unit, sticks City Homicide with the body he fishes out of the harbour. Nick negotiates a deal to steal a container from the docks but The Greeks end up reneging on the deal, leaving Russell to discover the bodies of 13 women in the aban

Rawls tries to pawn off the shipyard investigation to another jurisdiction after McNulty sends it his way. Valcheck goes after Sobotka and his union with a little help from above. Bunk, Freamon and Russell end up having to track a container ship to Philadelphia.

Bunk and Freamon chase their crime scene, a container ship, to Philly, where none of the crew finds it useful to speak English. Elsewhere, Lieutenant Cedric Daniels, disgusted with his exile to the evidence control unit, lets it be known he's going to leave.

Sobotka reprimands his nephew Nick for stealing the cameras and orders him to bring the cargo back before it's too late. Meanwhile, McNulty is on a self-assigned moral mission to identify his floater, but his old partner, Bunk, says they have a more pressing matter.

Ziggy loses his prized Camaro to drug dealers who aren't buying his alibis about not paying up. Meanwhile, unable to dump the homicide investigation on other police agencies, Colonel Rawls decides to lay the blame on Bunk if the cases go unsolved.

Trying to let go of work and return to his marriage, McNulty gives up on identifying his Jane Doe. Elsewhere, in their investigation of Sobotka, the detectives discover a pattern and explain the connection to Daniels, but he's still not convinced.

Sobotka gives his lobbyist abuse over the status of port legislation. Russell then tells Sobotka the investigation is over but a port computer is cloned and when a container goes missing, the detectives follow.

McNulty is back to his old self, on a drunken binge. Meanwhile, urged by fellow stevedores to fight Maui, Ziggy is again humiliated, but has a moment of redemption later at the bar. Elsewhere, Bunk is worried about McNulty so he asks Daniels and Rawls for their help.

Bodie's effort to improve sales ends disastrously, forcing Bell to rethink his strategy. Meanwhile, Ziggy pulls Johnny Fifty into a new caper that should have the Greeks paying off big, and McNulty, undercover and outnumbered, awaits 'rescue'.

Bodie is unhappy that Proposition Joe's people are slinging on his turf, but business flows until a new face from New York arrives... so Stringer Bell looks for an unlikely solution to the problem. Meanwhile, The Detail uses satellite technology to its advantage.

With the clock ticking, The Detail makes a desperate move and Daniels furiously rebukes Landsman for dropping the ball. Meanwhile, Nick's deceit is out in the open, and Sobotka is overwhelmed by bad news.

The Detail has a setback and needs a new co-operator, whilst Russell and Bunk visit Philly, looking for evidence. Elsewhere, Brother Mouzone talks with Stringer Bell regarding their agreement, leaving Bell to deal with Avon Barksdale.

Four boys from West Baltimore, Michael, Namond, Randy and Dukie, play out their summer vacation in the streets. The boys are then stirred into action when Dukie is beaten up, leaving Randy to concoct a retaliation plan against the rival gang.

Herc's soft-duty job with the mayor takes an unexpectedly hard turn. Meanwhile, despite the potential damage to her career, Pearlman provides Freamon and Sydnor with subpoena ammunition for their 'grizzly bear' hunt in City Hall.

With his poll lead shrinking, Royce resorts to extreme measures to stall Carcetti's momentum. Meanwhile, Michael proves adept as a runner, alerting both Bodie and Marlo, and Rawls replaces Asher with 'company man' Charles Marimow, who pushes a new agenda on the detail.

With Freamon and Greggs moved to Homicide, Herc and Dozerman join Marimow in the stripped-down Major Crimes Unit. Meanwhile, Cutty gets a 'custodial' job at Tilghman School mopping up truants, but can't make any headway in his efforts to mentor Michael.

Valchek leaks details of the Braddock case to Carcetti, who contemplates how to best leak it to the press... with the ensuing negative attention turning Royce against Burrell. Meanwhile, at school, Prez's reward and punishment programme meets with mixed results.

With Election Day near, the three mayoral candidates make last-minute appeals, with Carcetti seeking votes as he responds to a potentially devastating smear. Elsewhere, whilst following through on a promising video lead, Herc finds out just how elusive Marlo can be.

With the election finally over, Royce and Carcetti make their peace and contemplate their respective futures. Meanwhile, Marlo looks to identify his pursuers, infuriating Herc, who begs Carver to help; and Omar, who has a bounty on his head, calls in a favour to Bunk.

To monitor the pulse on the street, Carcetti makes the rounds with members of the force. Elsewhere, Herc, who has Marimow on his case, decides to resort to strong-arm tactics to retrieve his stolen camera, but Marlo isn't impressed.

After being in prison, Poot returns to the corner and is welcomed back by Herc and Dozerman. Meanwhile, Carcetti engages in a battle with City Council President Campbell; rewards Daniels with a promotion; and hits a snag in his efforts to relieve Burrell of his duties.

Acting on Clay Davis' 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 though, who instead sets his sights on cracking a string of church robberies.

After flexing his muscles around the city, Carcetti faces his first dilemma when a group of ministers protest Herc's mistreatment of one of their own. Meanwhile, Michael and the boys enact an elaborate revenge plot on a mean cop, and Namond takes a leap of faith.

On the trail of missing bodies, Freamon turns to a higher authority after being rebuked by Landsman. Elsewhere, Colvin approaches Deacon and Watkins to help keep his experimental class funded, and Bubbles considers taking extreme measures to rid himself of his nemesis.

The bodies from the vacants continue to pile up while Burrell offers his support to Daniels and forgives Rawls for crossing him. Elsewhere, Bubbles' revenge plan backfires, and Proposition Joe looks to the Co-op to pay shipment losses... but finds them uncooperative.

Whilst McNulty and The Detail continue staking out Marlo's crew, Sergeant Carver faces a cauldron of discontent from officers coping with unpaid overtime. Meanwhile, though he wants to keep his promise to lower crime, Mayor Carcetti is strapped by his pledge to schools.

Although he tells Sydnor the Davis investigation could be a 'career case', Freamon keeps a wary eye out for Marlo, who strikes a business deal with Barksdale. Meanwhile, Carcetti throws the police a bone by removing the cap on secondary employment.

Carcetti's master plan for the police is leaked to the press, sending the brass into a panic. Meanwhile, McNulty shares some inside info with Alma, but her subsequent story doesn't cause the splash either envisioned. Undaunted, McNulty looks for a new ally in Freamon.

The newspaper scramble to confirm surprising news from City Hall, but fear losing the scoop to TV media. Meanwhile, Proposition Joe pays his last respects to a fallen colleague, and prepares to make himself scarce in anticipation of a showdown.

Marlo forges an alliance with a drug connect who shows him a new communications trick. Meanwhile, McNulty's case is getting increased attention from the newspaper, thanks in large part to Templeton being added to the reporting team.

Mystified by Omar's disappearance, Marlo and Chris ramp up their efforts to locate their nemesis. Elsewhere, after attending a sparsely attended waterfront ceremony, Carcetti fires away at a larger press event and recasts himself as a champion for the homeless.

An unexpected call puts Templeton in the spotlight and gets McNulty more attention than he expected. Elsewhere, Omar sends Marlo a message, Carcetti proves he's still an adept fundraiser, Carver gift-wraps a witness for Bunk, and Bubbles shows a reporter the ropes.

Baltimore's renewed police commitment brings fresh recruits to Daniels and McNulty, starting with Carver. Meanwhile, as the Pulitzer season winds down, Haynes approaches Templeton about his sources, and Carcetti is forced to make some dangerous political deals.

With Steintorf ordering Rawls to initiate remedies for the rising crime rate, Freamon's vigilance pays off, sending Sydnor and the department into overdrive. Although Daniels is originally delighted, a further probe with Pearlman reveals some troubling information.

Carcetti maps out a damage-control scenario with the police in the wake of a revelation from Pearlman and Daniels. Meanwhile, with his leads drying up, McNulty asks Landsman to pull police off the homeless case - until a fresh homicide ramps up the investigation.