Episode #37: "New York Sour"

Debut: SUNDAY, SEPT. 8 (9:00-10:00 p.m. ET/PT)

Other HBO playdates: Sept. 8 (11:00 p.m.), 10 (midnight), 11 (10:00 p.m.), 13 (9:00 p.m.) and 14 (10:45 p.m.)

HBO2 playdates: Sept. 9 (9:00 p.m.), 13 (12:30 a.m.), 15 (2:35 p.m.) and 26 (8:00 p.m.)

Following his battle with Gyp Rosetti, Nucky makes a peace offering to Joe Masseria (Ivo Nandi) while working the odds with Arnold Rothstein. While Chalky is busy running the Onyx Club on the Boardwalk, the impulsive Dunn Purnsley (Erik LaRay Harvey) clashes with a booking agent. Fresh-faced Federal Agent Warren Knox arrives in Atlantic City to learn the ropes from Agent Sawicki (Joseph Aniska). Gillian seeks custody of her grandson, Tommy (Brady Noon), while trying to find a "good" man to keep the Artemis Club afloat. Eli's college-age son, Willie (Ben Rosenfield), 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.

Written by Howard Korder; directed by Tim Van Patten.