'Boardwalk Empire' Trailer: 'Heads Will Roll' (Video)

The second season of HBO's Prohibition-era drama series, starring Steve Buscemi, premieres Sept. 25.
Abbot Genser/HBO

HBO has released a new trailer for the upcoming season of its Prohibition-era drama series Boardwalk Empire.

The clip starts out on a lighthearted note before turning dark, giving hints of what's to come in the second season

"Heads will roll, gentlemen," says Agent Nelson Van Alden (Michael Shannon), who is working to shut down the alcohol trade.

The trailer is much different from the one HBO released earlier this month; that clip features corrupt politician Nucky Thompson (Steve Buscemi) strolling down the Atlantic City boardwalk exchanging ominous glances with all of the other castmembers.

Empire's second season debuts at 9 p.m. Sept. 25.