Walking dead tyreese
Is the blood in the prison corridor from a walker ... or a human? AMC/ Walking Dead Screenshot

Ready for yet another “Walking Dead” teaser trailer? The AMC series has released a brand new video promoting its fourth season, and it definitely previews tough times ahead for Rick and his crew.

The latest teaser video to be released is “Found Its Way In.” Clocking in at 16 seconds, the new promo doesn’t treat fans to any new footage, but instead pieces together clips from the Comic-Con trailer video.

“Everything we’ve been working so hard to keep out … just found its way in,” Hershel can be heard saying to someone in the video. The teaser features a hoard of zombies congregating at the prison fence. The volume of walkers at the spot causes the fence to violently sway, invoking fear of a massive breach at their safe haven.

Despite the group doing what they can to kill the walkers, one clip shows Tyreese looking down a bloody corridor at the prison … leading viewers to speculate a possible death. The blood in the hallway isn’t a puddle, but instead looks like somebody dragged a body. The question that remains is whether the body that was dragged down the hall was a walker … or a human.

“Found Its Way In” comes on the heels of the release of “Car Attack,” another 16-second teaser video. “Car Attack” features Daryl, Michonne, Tyreese and new character Bob Stookey as they get their car stuck on a pile of decaying walkers. With zombies quickly surrounding their car, the foursome are forced to get out and fight … or sit in the car and wait to die.

Season 4 of “The Walking Dead” will premiere on Sunday, Oct. 13 at 9 p.m. The first episode, “30 Days Without An Accident,” will pick up sometime between four and 11 months after the Governor attacked the prison.

Will you be tuning into season 4? Let us know your thoughts and predictions in the comments section.