A drug-deprived Thackery fears that a prominent inventor-surgeon will overshadow his accomplishments at the upcoming New York Surgical Society event. Meanwhile, Bertie courts Lucy as he fends off his father's demands that he leave the Knick; and staff members go to court to keep Typhoid Mary in quarantine.moreless
Danny and Baez's homicide investigation establishes her estranged brother, Jave "Tic-Tac" Baez, as the main suspect. Frank investigates police brutality complaints against a German Shepherd in the K9 unit. Henry checks out the widow of a former police pal when he suspects she might have had some responsibility for his death.moreless
Francis returns to his alma mater to have a library dedicated in his name. Peter Russo goes home to Philadelphia to make amends to the shipyard workers who lost their jobs and to propose a solution for the future.moreless
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.
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
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 anniversarymoreless
When the contents of an envelope fall on Alicia's desk, Will is forced to respond quickly to help his client.
Election day arrives and Nucky prepares for change. Torrio sets up a potentially hostile deal between two bitter rivals.
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.moreless
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.
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 factionmoreless
Nucky gets troubling news while visiting the Republican National Convention in Chicago.
Nucky investigates a theft on the boadwalk, Jimmy gets on the right side of Johnny Torrio and Margaret stands her ground regarding Lucy.
Nucky's St. Patrick's Day celebrations are cut short when Van Alden raids the establishment.
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.moreless
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.moreless
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.