The Walking Dead producer David Alpert was recently interviewed and shared some details about the upcoming Season Four of this hit zombie series. The season will premiere with 30 Days Without an Accident October 13th on AMC.

Here is what the producer said when asked about the differnces between the the third and fourth season.

"What we really have here in Season 4 is we dangle the carrot that civilization can be rebuilt... The notion that there's civilization and the notion that there's the possibility of there being laws and a sense of normalcy. I think we're going to see an evolution in the walkers - there's a whole bunch of new walkers - and we'll see an evolution of the threat of human-on-human. Dangling the possibility of civilization will make people much more desperate and willing to do things that would have previously been unthinkable."

He went on to talk about how the prison will change, along with some of the locations used in this upcoming season.

"There's been some real changes in the prison itself, so seeing how it's evolved from the last episode of Season 3 to the opening of 401, the prison looks totally different... We've also been looking at woods and a couple stretches of highway to find some interesting angles to showcase some unique action sequences that I can't tell you anything about."

With a lot of the main core of the show's cast dying off, he talked about who was the hardest to part with.

"The great thing about this show is that literally every character is on the table... We have no one that is untouchable... One of the hardest things was killing Shane. In the comic, it happened much, much earlier, and Robert had said he wanted to give that character a little bit more space to breathe. So trying to figure out what was the right place to kill Shane was really difficult... In the screening room here in production, there's a wall that says "Our Grateful Dead," and it's got pictures of all the characters who've been killed off over the seasons. It's kind of insane: One, it's kind of touching, and, two, we've killed a lot of people on this show. [Laughs] It's hard to say which one was the toughest."

He wrapped up the interview answering the question of who is going to join the "Our Grateful Dead" wall.

"Oh, there's going to be a whole bunch of people added to the wall."