We knew that the Martin Scorsese-produced Prohibition-era gangster series Boardwalk Empire would premiere this fall, but HBO has set the precise date/time of September 19th at 9:00.  Steve Buscemi stars as Enoch “Nucky” Thompson, “the undisputed ruler of Atlantic City… equal parts politician and gangster."  Scorsese will direct the pilot, written by series creator Terrence Winter (The Sopranos).  Hit the jump for the official synopsis.

Here’s the official synopsis:

In HBO’s “Boardwalk Empire,” the undisputed ruler of Atlantic City is the town’s Treasurer, Enoch “Nucky” Thompson, (Steve Buscemi) a political fixer and backroom dealer who is equal parts politician and gangster and equally comfortable in either role. Because of its strategic location on the seaboard, the town is a hub of activity for rum-runners, minutes from Philadelphia, hours from New York City and less than a day’s drive from Chicago. And Nucky Thompson takes full advantage in HBO’s “Boardwalk Empire.”

Along with his brother Elias (Shea Whigham), the town’s Sheriff, and a crew of Ward Bosses and local thugs, Nucky carves out a niche for himself in HBO’s “Boardwalk Empire” as the man to see for any illegal alcohol. In “Boardwalk Empire,” he is an equal opportunity gangster, doing business with Arnold Rothstein (Michael Stuhlbarg), Big Jim Colosimo (Frank Crudele), Lucky Luciano, (Vincent Piazza) and Al Capone (Stephen Graham).

We here at Collider are totally pumped for this to hit the airwaves.  In case you missed it the first time around, here's a rather awesome trailer: