"The Walking Dead's" prison safe haven isn't that safe anymore.
In the new trailer for "The Walking Dead" Season 4 premiere above, zombies overtake the stronghold and it looks like several of your favorite zombie apocalypse survivors may be in danger.
"Everything we've been working so hard to keep out just found its way in," an ominous voiceover says.
Talk about scary.
"The Walking Dead" Season 4 premieres Sunday, Oct. 13 at 9 p.m. ET on AMC.