This morning, Vulture released the new poster for the second season of HBO's Boardwalk Empire, which is set to make its return on September 25th.

The new poster follows last week's mysteriously open-ended season trailer, and features choice members of the cast milling about the boardwalk with a mean (and slightly paranoid) looking Nucky (Steve Buscemi) looking sharp in a bowtie and an equally menacing Margaret (Kelly Macdonald) on his arm.

If the poster's tagline ("Know Who's Behind You") and the scene's all-around sketchy vibe are any indication, there's trouble in store for Nucky. Clearly, our boy better watch his back.

[Via Vulture]