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.

"Paris Green" is the 11th episode of the first season of the HBO television series Boardwalk Empire, which premiered November 28, 2010. The episode was written by supervising producer Howard Korder and directed by Allen Coulter.

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.

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

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.

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.

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

Following his battle with Gyp Rosetti, Nucky makes a peace offering to Joe Masseria while working the odds with Arnold Rothstein. While Chalky is busy running the Onyx Club on the Boardwalk, the impulsive Dunn Purnsley clashes with a booking agent. Fresh-faced Federal Agent Warren Knox arrives in Atlantic City to learn the ropes from Agent Sawicki. Gillian seeks custody of her grandson, Tommy, while trying to find a “good” man to keep the Artemis Club afloat. Eli’s college-age son, Willie, turns to Nucky for career advice. Al Capone enlists his brothers, Frank and Ralph, to help him expand his business in the Chicago suburb of Cicero. Richard Harrow returns to his violent ways.

Now working as a “delivery man” for Dean O’Banion, Van Alden is ordered to keep tabs on Al Capone, joining the ascendant mobster to help keep Cicero voters “informed” at a political rally. Dr. Valentin Narcisse arrives in Atlantic City, clashing with Chalky and Nucky over the loss of an employee. In Washington, Agent Knox aligns himself with J. Edgar Hoover, acting director of the Bureau of Investigation. Harrow fails to finish a job in Milwaukee, while Eddie demands a promotion after 11 years of service. With a business opportunity on the horizon, Nucky departs for Florida.

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.

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.

Nucky’s shipment from Florida arrives with some unexpected cargo. Eli is backed into a corner after Agent Knox uncovers some new dirt on the Thompsons. After talking things over with Nucky, Willie reconsiders his recent life choices. Chalky throws down the gauntlet toward Valentin Narcisse, upholding his leadership on the Northside.

Nucky takes inventory after being warned of a skunk in his cellar. On the lam following a close call, Chalky and Daughter take refuge outside Wilmington with Oscar Boneau, his mentor from years ago. Gillian considers selling her mansion and starting a new life with Roy Phillips.

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 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.

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 and Margaret find common ground in Atlantic City; Luciano encounters an old adversary; Sally Wheet makes a payment in Cuba; in 1884, young Nucky moves up the Commodore's ladder.

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

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

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