'Walking Dead' Footage at Comic-Con Shows New Faces and a 'Worse World' [Video]

At Comic-Con on Friday, AMC premiered footage from the upcoming fourth season of "The Walking Dead." The trailer showcased a rebuilt and reinforced prison in which a new group of survivors have joined the series regulars, and it hinted at what the show's creators promised will be a renewed threat from the show's zombies.

[Related: 'The Walking Dead' Creator Talks Season 4 Theme and New Series He's Creating for AMC]

Some highlights from the show's stars on what's in store for their characters:

  • Andrew Lincoln (Rick) on the Woodbury survivors joining the group: "When we meet them all in Season 4, there is a whole new community in the prison and friction between certain characters. It makes for incredible character-driven scenes."

  • Creator Robert Kirkman: "The world is getting worse, the people are getting more ragged, and it’s going to keep progressing, if you can believe that."

  • Lincoln on Rick's relationship with son, Carl: "Rick seeing turning into a sociopath at the end of the season woke him up to his parenting duties. You find Rick in a completely different place this season."

  • Kirkman on the Governor: "All bets are off with the Governor. How he returns is going to be a mystery of the next season."

  • David Morrissey, who plays the Governor, on whether he thinks the character is completely evil: "I mean, he went off with two of them; he didn't kill them all. So, you've got to give him that."

  • Norman Reedus on Daryl: "Without Meryl around, he can find this sense of self-worth that he never had before."

  • Chad Coleman on his character: "On a certain level, Tyreese is still trying to figure out how he fits in and what are the rules of engagement for him."

  • Scott Wilson on the motivation of his character, Hershel: "I think he just wants to hold on to his other leg."

Season 4 of "The Walking Dead" premieres Sunday, 10/13 at 9 PM on AMC.

Check out all the TV stars at this year's Comic-Con: