'Boardwalk Empire': Everybody's Got a Gun in New Season 3 Trailer (Video)

Boardwalk Empire Steve Buscemi Sphinx - H 2012

Boardwalk Empire Steve Buscemi Sphinx - H 2012

Steve Buscemi's Nucky Thompson may have taken care of the growing threat that was Jimmy Darmody (Michael Pitt) on Boardwalk Empire, but there's plenty more to challenge Atlantic City's top dog.

In a new trailer for the upcoming third season of the HBO mob drama, Bobby Cannavale's Gyp Rosetti enters the picture as a ruthless gangster who will challenge Nucky's hold on the bootlegging business.

STORY: Emmys 2012: 'Boardwalk Empire's' Michael Pitt on Saying Farewell to Jimmy

Meanwhile, Nucky and his likely new bride Margaret (Kelly Macdonald) don't seem to be enjoying the married life as he learns that she signed away his land to the church, launching him into an unwelcome role sa an unwilling benefactor.

Elsewhere, politics in New York heat up with Al Capone (Stephen Graham) isn't very keen on keeping a resolution to behave himself.

STORY: 'Boardwalk Empire' Boss on the Awkward Email That Killed Off Michael Pitt

Boardwalk Empire returns Sunday, Sept. 16 on HBO. Watch the trailer, below, and hit the comments with what you're most looking forward to seeing.

Email: Lesley.Goldberg@thr.com; Twitter: @Snoodit