Nucky's war with Luciano draws in Willie and Eli after Eli's son is kidnapped as Nucky tries to maintain his control in Atlantic City. Meanwhile, Maranzano's tenure as boss is nearing the end; Gillian sends a letter from the hospital; and in 1897, a young Nucky quarrels with Mabel about a runaway from Trenton and does a favor for the Commodore.moreless
Nucky doesn't get much time dealing with Margaret's affair when Gyp's men ambush him in the hotel. He flees with the wounded Eddie Kessler, and as there's nowhere safe to turn, it seems he'll be losing his last loyal man. With a price on his head, Nucky seeks refuge at Chalky's...
Gillian also has to suffer under Rosetti's willfulness when he chooses her club as a new headquarter, forcing her to lock Tommy in his room and finally even take measures against Richard, as she clings to her grandson against all common sense.
As Capone's cavalry rides in, the war starts: with firepower on the one hand and scheming to alienate Masseria from Rosetti, Nucky fights to get his business back and keep his life. Gillian takes on Gyp with her very own weapons, but sees herself overpowered; Richard poses as a one-man-army and seems to have more luck saving what's important. Meanwhile, Margaret has run off to face difficult decisions – not only about her unborn baby, but also about the future of her marriage.
Nucky heads to New York to hire a new lawyer after firing the last. After failing to get the black workers back to work, Jimmy asks Chalky for his demands and instructs Mickey to pay his debt to Manny.
Knox uses torture methods on Eddie, Al's brother is gunned down, and Nucky advises Willie to stick to his false alibi.
Eli begins to question the choices he's made, Richard goes hunting in the forest with no intentions of returning, and Nucky invites a surprise guest speaker to a war veterans Memorial Day.
Jimmy despairs because of his wife's murder which the police suspect him of committing. With Jimmy off the scene, his partners try to take his share.
Nucky and Owen end up trapped and hiding in a house from the feds after tracking down a thief who has been stealing from them.
Nucky makes some family changes on hearing about the death of his Father. Jimmy's current success causes him to rethink his relationship with Angela whom has made a feisty new friend at the beach.
Owen makes plans with Katie as well as with Margaret, but those will turn out a whole different way after Nucky sends him to take care of Joe. Nucky too makes promises to his wife, speaking of a better future while trying to sort out his current business situation – being troubled with this, he turns down Chalky, one of his few allies left. On the political side, Gaston takes further action.
Meanwhile, Gyp has to deal with the uncertainties of nature, and Nelson "George Muller" Van Alden with the nature of uncertain dealings.
Nucky himself reaches out for a powerful ally, while dealing with his mistress getting more attention than he's comfortable with. Meanwhile, Margaret has to concern herself not only with a living birthday present for her daughter, but also with some delicate feminine issues.
Agent Knox's plan to take down Nucky begins.
Jimmy takes drastic measures to prove himself. Margaret visits her family in New York, whilst Nucky deals with Lucy and Van Alden in Atlantic City.
Julia proposes to Richard much to his delight, prompting him to ask Nucky for work. Narcisse beats Maitland for her failure.
Nucky travels to Belfast in the hope of trading Thompson machine guns for Irish whiskey. Margaret receives some devastating news.
Rothstein asks Gyp to be his new supplier but has other plans in mind. Gillian worries about her business.
Chalky botches the hit on Narcisse and ends up wounded himself. Van Alden saves Al Capone when the building is lit up with Tommy gunfire, and Nucky is forced into dealings with Narcisse.
Nucky asks the Attorney General for a favor when the Commodore stops alcohol reaching Atlantic City.
To celebrate the New Year of 1923, Nucky decides to hold a flash New Year's Eve bash. Margaret helps him the hosting, despite their recent disputes. Tensions heat up when a hot-tempered gangster from New York arrives in town.
Nucky's attorney devises a plan that may help in Nucky's court case. Eli grows concerned over the Commodore's leadership abilities and Mickey's warehouse is next in Van Alden's sights.
Agent Tolliver hears what happened with Willie at the school and uses it to blackmail Eli. Narcisse arranges with Maitland to kill Chalky.
With Nucky's trial right around the corner, Jimmy tries to make amends, but is it too late? Margaret makes a life changing decision and Van Alden flees to the Midwest.
Insurrection rears its ugly head amongst Nucky's ranks. Chalky escapes death when he and some of his men are attacked by the Klu Klux Klan. Margaret continues to worry about Tommy's behavior and Van Alden takes his wife out on the town for their anniversary
Nucky investigates a theft on the boadwalk, Jimmy gets on the right side of Johnny Torrio and Margaret stands her ground regarding Lucy.
Nucky loses confidence in Rothstein as a partner. Willie plays a revenge prank on a fellow student that goes woefully wrong, and Federal agents continue to close in on Nucky's business.
Nucky reaches out to Joe Masseria after the battle with Rosetti. Gillian takes action to gain custody of her grandson. Eli's oldest son asks Nucky for career advice.
While visiting Tampa, Nucky finds himself attracted to a local bar owner. Willie tries to pinch some alcohol from Mickey's warehouse, and Richard's sister comes to his aid.
Gyp bribes the townspeople into silence while Nucky schemes to have him taken out of the picture for good. Gillian has words with James regarding Tommy.
Van Alden is ordered to keep an eye on the Capone's. Dr. Valentin Narcisse arrives in town with nothing but trouble with him. Eddie demands a promotion.
Van Alden's increasingly conflicted emotions start to interfere with his work. Nucky has words with Margaret in regards to her support. Also, Angela is taken aback when seeing Jimmy's violent side.
Nucky's St. Patrick's Day celebrations are cut short when Van Alden raids the establishment.
Margaret tries to help Madame Jeunet with her money troubles by speaking with Nucky. Jimmy is forced to return to Chicago to deal with the D'Alessio brothers and Nucky gets ready for war with a rival faction
Al and Jimmy negotiate with a supplier in Greektown. Nucky organizes a surprise party for a U.S. Senator, lobbying him to get more roads to Atlantic City. Chalky, with the aid of Elias, investigate Chalky's driver's lynching. Jimmy settles in with Al and his boss, Johnny Torrio.
Eli invites Nucky to Easter dinner in the hope of mending a few fences.
Van Alden battles with his conscience. Nucky's court case hits a hurdle while he tries to set up a liquor delivery to Philadelphia.
Chalky tries to help his daughter, Maybelle. Nucky's emotional state leads to Gyp getting the upper hand. Eli gets out of prison, and Margaret's concerns on the sanitary condition of the hospital are not taken seriously.
Still grieving for his brother, Al, in a fit of rage kills a policeman. Rothstein and Margaret unexpectedly run in to each other, and Willie drops out of college, enraging his father.
Election day arrives and Nucky prepares for change. Torrio sets up a potentially hostile deal between two bitter rivals.
Nucky gets troubling news while visiting the Republican National Convention in Chicago.
Jimmy becomes friends with a fellow veteran who lost half his face in the war. Luciano and Meyer Lansky make a deal with the D'Alessio brothers and Nucky deals with some unpleasant childhood memories.
On realization that he might be losing control over Atlantic City, Nucky endeavors to discover which one of his men betrayed him. Rothstein puts Jimmy on hold in New York, with Lansky and Luciano still looking to do business. Dunn Purnsley gets more than he bargained for when he gets in Chalky's face in prisonmoreless
Chalky and Maitland hide out at his old mentor's, Oscar Boneau. Gillian contemplates selling her business for a life with Roy.
Margaret starts a personal mission to start a women's clinic at the hospital. Nucky struggles with rumination over Jimmy. Van Alden finds it tough in his new position as a salesman.
Eli discovers Eddie's key whilst investigating his death, but can't access what it opens, and Nucky gets some nuckie with Sally.
The women's health clinic Margaret wants to set up runs into trouble. Gillian must make some changes to stay afloat and Van Alden finally come clean to his wife.
Jimmy finds himself in trouble when a dying witness fingers him for the murders in the woods. Chalky's deal with Nucky hits trouble when his driver is lynched. Margaret gets a job at a boutique.
Jimmy speaks with his father after nine years. Nucky has heated conversations with both Eli and Margaret regarding the business and the murder of Margaret's husband. Van Alden takes matters to the extreme with Agent Sebso and Angela's plans to flee to Paris are scuppered.
On the eve of Prohibition, January, 1920. Nucky Thompson, Atlantic City's Treasurer, condemns alcohol at a Temperance League meeting for women, however, behind closed doors he is telling his ward bosses about the huge amounts of cash they could get selling bootleg liquor.
Nucky is paid a visit by Agent Van Alden who feels a crime is being pinned on a scapegoat and wants some answers, forcing Nucky to close ranks on all his operations. He visits his old mentor, Commodore Louis Kaestner regarding the womens right to vote and later meets with Margaret Shroeder, still recovering from the beating she received from her now deceased husband, who has asked for help with her children.moreless