Source: AMC | Posted By: Dan Geer

As San Diego Comic-Con continues on this weekend, fans of the widely popular AMC series The Walking Dead finally got their first real glimpse at Season Four with an extended trailer for the show, which premiers October 13th at 9PM EST. Essentially, we see in the trailer that the prison Rick Grimes (Andrew Lincoln) and his groupies have taken up residence in may or may not hold up for much longer, as more and more zombies continue to ravage its defenses, and it appears that a mole may be lurking among the group, trying to actually help out said undead creatures. While The Governor does not make an appearance in this trailer, it is still of course exciting to see all-new footage from the upcoming season nonetheless. Hit the jump to watch!

The Walking Dead, produced by Robert Kirkman, Gale Anne Hurd, Gregory Nicotero, and Scott M. Gimple, stars Andrew Lincoln, Norman Reedus, David Morrissey, Chandler Riggs, Steven Yeun, Scott Wilson, Lauren Cohan, Danai Gurira, Lawrence Gilliard Jr., Melissa McBride, and Emily Kinney. Season Four premieres October 13th at 9PM EST.