The latest Walking Dead season 4 commercial has an ominous reminder: “Nowhere is safe.”

Check out the latest promotional video below, which will surely be running this weekend ahead of the Breaking Bad series finale on AMC:

The Walking Dead season 4 promo plays into a common theme seen in other videos and photos for the Fall 2013 run: Zombies possess a new power which will allow them to enter the prison area. It’s not clear how they developed this new ability, but it does look like they’ll be able to at least infiltrate the fences that surround Rick and his friends’ safe house.

Just yesterday we shared with you a slew of high-res photos from episodes 1 and 2. At the same link you’ll find portraits of each recurring character.

Ready for the show to begin? The Walking Dead season 4, episode 1 premieres Sunday, October 13 at 9 p.m. eastern/pacific on AMC. The first episode of the season is titled “30 Days Without An Accident,” which suggests that at the very beginning of the storyline things at the prison will be pleasant for everyone.