AMC has released a new teaser for Season 4 of “The Walking Dead,” and it shows that the prison compound the survivors have set up is not exactly walker-proof.

As seen in the show’s Comic-Con trailer, walkers tend to linger outside the prison fence. The humans inside have set up a pretty good perimeter, but it’s not perfect. As you can see in the 40-second clip*, when Michonne (Danai Gurira) rides in and Carl (Chandler Riggs) opens the gate for her to enter the compound, a couple of unwanted guests follow her.

(*The full video runs a minute and 20 seconds, but the first half of that is a promo for “Low Winter Sun”; the “Walking Dead” clip aired during Sunday’s episode of the show.)

Based on the way everyone reacts to the situation, it looks as though this particular problem has popped up before — which doesn’t make it any less hair-raising to watch.

“The Walking Dead” returns to AMC on Sunday, Oct. 13. What do you think of the clip?

Posted by:Rick Porter