We're less than a month away from the fourth season premiere of Big Love.

While fans are still buzzing over the fact that Amanda Seyfried is leaving the show, her character of Sarah will stick around for eight of this season's nine episodes.

She's featured on the trailer below, as is Bill when he makes a major announcement: he's running for state senate. Check out the official HBO preview now and remember to visit TV Fanatic each week for the most detailed Big Love recaps/reviews on the Web...

[video url="http://www.tvfanatic.com/videos/season-4-trailer/" title="Season 4 Trailer"] [/video]

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.