'The Walking Dead' Season 4 episode 4 'Indifference' preview clips

"The Walking Dead" Season 4 episode "Indifference" is going to be a race against time to try to get antidotes to those at the Prison infected with the virus. In the above promo, which played after episode 3 "Isolation," it's revealed that Rick and Carol go on their own quest to try to find medicine for those who have gotten deathly ill.

In the below clip, Rick and Carol go through people's homes to try to medicine that would be useful to Hershel back at the Prison. It's always jarring to see houses looking clean and normal when the survivors go raiding on "The Walking Dead" considering how dirty and messy the rest of the world is. As typically happens, a walker ends up being in the home, and Carol quickly kills it. But there's something else in the house as well that isn't revealed in this clip. Could it be a person?

In another clip, below, Daryl & co. continue on their similar-- albeit darker -- mission to find antibiotics. It's unclear if they ended up getting to the veterinary college that Hershel sent them to, but the location is overrun with walkers regardless. Hopefully they find something useful there or else the infected folks at the Prison might be out of luck.

"The Walking Dead" Season 4 airs Sundays on AMC at 9 p.m. ET.

Photo/Video credit: AMC