Nucky makes a deal with Rothstein as his war with Gyp Rosetti reaches its climax. Season finale.

Gyp makes his move in Atlantic City, forcing Nucky and Eddie to seek refuge with Chalky. With the Artemis Club overrun by Rosetti thugs, Gillian contemplates a business future that includes an unwelcome partner. Luciano makes a deal he’ll come to regret. Harrow loses his house privileges.

Eli braces for the worst as Agent Knox launches his plan to bring Nucky down. Capone and Torrio reach an agreement in Cicero. Chalky looks to settle scores. Richard steps forward to save Tommy, at Gillian’s expense

Nucky faces a difficult, bottom-line business decision.

Nucky plans to relocate to Manhattan; Margaret impresses Nucky and a grain company stockholder.

With Margaret pondering the consequences of sin, Nucky prepares her for a worst-case scenario as Esther Randolph plays out her trump cards. Jimmy revisits his college days with Angela and Gillian. Mickey Doyle chafes at sharing his liquor profits. Eli refuses to cop a plea. Nelson's past comes back to haunt him, tipping the scale in Nucky's favor.

Nucky tries to hold onto his assets in Atlantic City; Willie and Eli become involved in Nucky's war.

Nucky enlists Eli and Agent Knox to check the cargo in the Florida shipments; Margaret considers making a deal with Rothstein; Capone grows suspicious of Torrio; Nucky faces a dilemma.

Nucky tries to keep Jess Smith quiet and neutralize Gyp's alliance with Joe Masseria; Margaret considers an alternate future; Van Alden's side business backfires; Gyp's shipment is short; Chalky sees an opportunity.

Nucky heads to Philadelphia; Agent Knox detains Eddie Kessler to obtain information about Nucky's organization; Gillian tries to score a fix; Van Alden is recruited by the Capones.

Gillian makes her peace with Jimmy's death; Van Alden attends a meeting with Capone and Torrio; Nucky makes an offer to Andrew Mellon; Margaret makes a stand on birth control; Nucky and Owen shop for a pony; Billie considers a future in film.

Undercut by Nucky, who has a new source for alcohol, Jimmy and his partners look to cultivate a new revenue stream in Atlantic City. With the peak tourist season approaching, the Commodore’s crew faces a choice in dealing with the city’s striking workers; either negotiate or fight back. Fearing that sin has led to misfortune, Margaret approaches Father Brennan with an “act of devotion.” Nucky gets a new lawyer. Van Alden faces an uncertain future. Manny Horvitz takes exception to a debt payment.

Nucky faces Election Day in Atlantic City and pulls out all the stops to keep power in Republican hands. Torrio brokers a discussion between Nucky and Rothstein to resolve their growing gang war, as well as Rothstein's looming federal indictment over the World Series. Both Jimmy and Eli voice their growing resentment towards Nucky, and find they have an ally in the Commodore. Van Alden seeks a sign on whether or not to leave Atlantic City, but receives unexpected news from Lucy. Margaret weighs new information about Nucky's first marriage and her uncertain future to make a final decision on her role in his life.

Federal agents enlist the help of Eli and Van Alden to take down the Capone organization.

Despite being publicly embarrassed by legal trouble, Nucky's biggest concern may be holding on to his private army in a battle for control of Atlantic City. Meanwhile, Jimmy pitches a business deal to Arnold Rothstein in New York, but may have more in common with Meyer Lansky and Lucky Luciano. Margaret draws on past experience to retrieve some valuable information, Chalky clashes with a fellow inmate, and an Irish nationalist comes to town looking for support.

After a dispute with his enemies, Nucky brings in a surprise guest speaker at a Memorial Day dedication for war veterans. Running out of options, Eli questions his allegiances, but it ends up sending him deeper into the hole. Nucky hires a new lawyer. Jimmy is taught a lesson by one of the Commodore's men that he won't soon forget. Richard decides to go hunting in the forest.

Nucky vows to eliminate his nemesis. A high-profile bootlegger is arrested. Emily's birthday party is scaled down. Gillian blames Harrow for Tommy's trouble. Gyp decides to buy a town's silence.

Nucky heads to Tampa to work out details of his land deal with Bill McCoy; Richard Harrow returns to Atlantic City; Agent Knox tries to gain Eli's trust; Chalky takes out his frustrations on Daughter Maitland.

Eli confronts Nucky after Willie makes an unpopular decision. Margaret has a surprise encounter at her job on Wall Street. Joe Masseria orders Lucky Luciano to return to Tampa and deal with Vincenzo Petrucelli. Gillian goes cold turkey, with Roy Phillips’ help. Still seething over his brother’s death, Al Capone tries to get Johnny Torrio to turn on rival gangster Dean O’Banion. As Chalky White and Daughter Maitland’s relationship deepens, Valentin Narcisse exerts his control over Dunn Purnsley and the Northside.

An unlikely witness to the woods massacre threatens to expose the perpetrators, sending both Eli and Van Alden rushing to the hospital. Margaret starts a new job at an upscale French dress shop at the Ritz, while Chalky's team pays a heavy price for taking over Mickey Doyle's bootleg operation.

Nucky is detained in Washington; Margaret copes with Teddy's demons; Owen investigates a suspicious fire; Richard makes a connection with a veteran and his daughter.

Nucky reminisces about catching the Commodore's eye; Nucky joins Sally Wheet in Cuba; Margaret finds herself in the hot seat; Chalky tries to extricate himself from a difficult situation; Lucky Luciano sets a bold plan in motion.

Nucky deals with the fallout from Jimmy's rogue heist, sending Eli to sow the seeds of doubt in the mind of Margaret, who seeks help in the wake of her husband's demise.

Mixing business with pleasure in New York, Nucky bristles at the collection tactics of Gaston Means, a “special investigator” with ties to Attorney General Harry Daugherty. At St. Theresa’s, Margaret is troubled when her altruism is met with resistance by both a patient and an idealistic doctor. Gyp extends his stopover in Tabor Heights, a town halfway between Atlantic City and New York, with an eye towards establishing a strategic foothold. Chalky and his daughter Maybelle (Christina Jackson) fail to agree on her future with Samuel (Ty Michael Robinson); Eli gets a new boss and faces new realities at home; a major liquor shipment takes an unexpected detour.

Nucky pays a visit to Johnny Torrio; Eli and Van Alden must recoup money lost during a federal raid by Eliot Ness; Willie has a job interview; in 1884, young Nucky deals with the death of his sister.

Chalky heads in a new direction; Margaret finds herself in a quandary; Nucky hosts a prospective partner from Boston; Luciano and Siegel meet with Narcisse in Harlem; in 1884, young Nucky flirts with a girl.

Nucky visits Chicago for the Republican National Convention, where he finds himself intrigued by the candidacy of Warren G. Harding over more established candidates. The D'Alessio gang moves in on Nucky's territory at the expense of Eli, who has been watching over his brother's affairs. Margaret finds herself entangled in Nucky's business affairs, while Van Alden struggles with his wife's desire for a child. Rothstein prepares for legal trouble over his role in fixing the 1919 World Series. Nucky asks Jimmy to return to Atlantic City to reinforce his position.

After the brazen robbery of one of his ward bosses, Nucky turns up the heat on Lucky Luciano. An emboldened Margaret stands up to Lucy at the dress shop and accepts an offer from Nucky to change her circumstances. In Chicago, Al's frustration over family issues spills over into his relationship with Jimmy, who scores points with Johnny Torrio for a bold power play involving Sheridan and the neighborhood of Greektown.

In Chicago, Jimmy bonds with one of Johnny Torrio's prostitutes, Pearl, and finds himself increasingly at odds with the hot-headed Al Capone. Back in Atlantic City, Nucky looks to leverage his political relationships with ambitious U.S. Senator Walter Edge and Jersey City Mayor Frank Hague, while Eli and Chalky go to extremes to interrogate a local KKK leader.

Eli hopes to get back in Nucky's good graces; Gillian tries to improve her future; Gyp asks for a blessing in New York.

Disturbed by a recent nightmare and Billie’s absence, Nucky reluctantly joins Margaret to receive a high honor from the Church. Meanwhile, Gyp makes a deal with Nucky for a onetime liquor shipment, though the mobster’s longtime intentions remain very much up in the air. Van Alden regrets trying to socialize with his co-workers; Margaret takes her women’s-clinic pitch to a higher authority; Lucky and Meyer (Anatol Yusef) protect their investments; Richard sets the record straight with Mickey, and with Nucky.

Nucky has reservations about investing in a Tampa land deal engineered by transplanted bootlegger Bill McCoy. While there, he meets speakeasy owner Sally Wheet. Valentin Narcisse books a sexy jazz singer, Daughter Maitland, to perform at the Onyx, and gauges Dunn Purnsley’s allegiance to Chalky. Willie, Eli’s son, turns to Mickey Doyle and his bootleg warehouse to elevate his social standing at college. Gillian agrees to pose as Roy Phillips’ wife to impress a possible partner. Harrow tries to bury his past, though not before taking care of some unfinished business with Emma.

Nucky has emotionally charged conversations with both Margaret and Eli over his business and the killing of Margaret's husband. Jimmy meets with his dying father for the first time in years. Van Alden and Agent Sebso's working relationship is pushed to the limit by Van Alden's suspicions. Angela prepares to flee from Jimmy to Paris.

After his father Ethan is injured in a fall, Nucky uses the opportunity to refurbish his childhood home. On a double-date with new friend Annabelle and her beaux, Margaret tries to get Nucky to open up about some painful childhood memories. During a visit to an army hospital, Jimmy befriends disfigured vet Richard Harrow, whose sharp eye proves invaluable. Van Alden gets a lead on the woods massacre.