Season 4 of the Prohibition-era drama opens in February 1924 as Nucky (Steve Buscemi) makes peace with New Yorkers Masseria (Ivo Nandi) and Rothstein (Michael Stuhlbarg), moves into the abandoned Albatross Hotel and, coincidentally, spreads his wings with a potential real-estate bonanza in Florida, where he's smitten with a saucy barkeep (Patricia Arquette). Back in Atlantic City, Chalky (Michael K. Williams) runs the boardwalk's Onyx Club, though the mysterious Harlem intellectual Dr. Narcisse (Jeffrey Wright) challenges his North Side reign, and Eddie (Anthony Laciura) finally gets a promotion. In Philadelphia, Eli's son Willie (Ben Rosenfield) dives in over his head at college; while in the Midwest, Nelson (Michael Shannon) pulls double duty for Chicago mobsters Capone (Stephen Graham) and O'Banion (Arron Shiver), and a wandering Richard (Jack Huston) reconnects with his roots. With Shea Whigham, Brian Geraghty, Ron Livingston, Margot Bingham, Anatol Yusef and Domenick Lombardozzi.