"Boardwalk Empire" returned for its Season 3 premiere Sunday night and quickly made clear that we are dealing with a darker, more powerful Nucky Thompson this season. A graduate of the "half gangster" school of liquor bootlegging, Nucky's embraced a more violent approach after offing his former protege Jimmy Darmody in last season's finale. Now looking to simplify his operation and become something of a liquor wholesaler, Nucky told a room full of bootleggers that he'd only be selling booze to Arnold Rothstein, and instantly made himself more enemies than he already had.