The Walking Dead‘s season 4 premiere is creeping closer and AMC is giving fans another inside look at the new episodes. We learn quite a bit from this new teaser. Six-to-seven months have past since we last saw our band of survivors…Carl makes friends his own age…Carol becomes a teacher of sorts lecturing the kids about the use of knives, of course…and the prison begins to fall apart. “It’s not really walkers and it’s not other people,” says co-exec producer Denise Huth. The dangers is “from inside,” hints special FX lead Greg Nicotero. Every character will be pushed to their breaking point, remarks TWD creator Robert Kirkman. And for those of you hoping for happy ending, new showrunner Scott M. Gimple has these morose words for you: “There might not be any hope.”

The Walking Dead returns October 13.