Nucky is shocked by an insurrection among his inner circle and an attack threatens Chalky's life and livelihood. Margaret deals with her son's problems. Angela vies for Jimmy's love and Van Alden shows his wife around town.

Nucky contemplates betrayal in his inner circle while Margaret tries to help him avoid trouble. Chalky is badgered in prison and Owen Sleater scouts the Thompson residence.

Nucky calls in a favour and Owen Sleater intervenes on a delivery intended for a struggling casino operator. Dinner guests clash at Babette's, and Lucy frets about her loneliness.

Nucky considers a risky legal manoeuvre whilst Jimmy and Mickey head to Philadelphia. Eli worries about the Commodore's ability to lead; Van Alden's agents target Mickey's warehouse and Richard lets down his guard.

Nucky introduces a surprise guest speaker at a dedication for war veterans. Eli questions his allegiances and Nucky gets a new lawyer. Jimmy learns a lesson and Richard goes hunting.

Nucky arranges a risky liquor delivery whilst complications arise in his federal case. Jimmy finds a new mentor and Margaret makes a confession. Lucy struggles in solitude and Van Alden wrestles with his conscience.

Jimmy faces a decision that could shape the future of Atlantic City. Margaret travels to Brooklyn for a bittersweet reunion with the family she left behind in Ireland and Owen settles a score.

In the wake of a personal loss, Nucky solicits advice on his political situation from Arnold Rothstein. Angela eavesdrops on her husband's treachery and Jimmy flexes his muscles, at Mickey Doyle's expense.

Arriving in Belfast, Nucky and Owen meet with IRA leaders with a barter proposition. Margaret frets when Emily takes a turn for the worse and Jimmy and partners broker a deal with George Remus for his 'medicinal' alcohol.

Undercut by Nucky, Jimmy and his partners look to cultivate a new revenue stream in Atlantic City. Elsewhere, the Commodore's crew face a choice in dealing with the city's striking workers - negotiate or fight back.

Nucky prepares Margaret for a worst-case scenario as Esther Randolph plays out her trump cards. Jimmy revisits his college days with Angela and Gillian whilst Mickey Doyle chafes at sharing his liquor profits.

With Nucky's trial looming, Jimmy looks to make amends. After weighing an offer from Esther Randolph, Margaret makes a decision that will change the course of her future, and Nucky's.