'Walking Dead' Season 3 premiere 'Seed' trailer is haunting and ominous

This recently released trailer for "The Walking Dead" Season 3's premiere, "Seed," comes as close as anything yet to encapsulating the episode's unsettling mix of quiet dread and brutal action.

Scored to The Wailin' Jennys' mournful ballad "The Parting Glass" (which was also used in the show's extended Comic Con teaser back in July), the teaser's first line of dialogue comes from Rick informing the group, "We gotta push just a little bit more." And the tension immediately escalates to a frenzied pace with quick glimpses of action from both the season premiere and future installments. It's as intense as everything we've already seen, and even more haunting than the previous walker massacre teaser.

Check out the latest trailer below. "The Walking Dead" returns to AMC Oct. 14 at 9 p.m. ET. But if you need a faster walker fix, try AMC's four-part webisode series "Cold Storage" directed by the show's makeup wizard Greg Nicotero.