When the world ends, the battle begins.

So teases the trailer below, which gives fans their first extended look at season six of Supernatural. Following the conclusion of this show's first story, it will be interesting to see what the next one brings.

Start to find out now:

[video url="http://www.tvfanatic.com/videos/supernatural-trailer/" title="Supernatural Trailer"] [/video]

Visit our Supernatural spoilers section for more insight into the new season. It premieres on Friday, September 24.

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