Andrew Lincoln Andrew Lincoln

There are no safe places on The Walking Dead.

Rick (Andrew Lincoln) and the rest of the survivors learned that the hard way over the course of the first two episodes as a flu ravaged through the prison. As if that wasn't enough, now there's a vicious murderer roaming the halls!

Mega Buzz: How dangerous is that flu on The Walking Dead?

In an exclusive first look at Sunday's episode, we get a glimpse of the group that leaves the prison in search for supplies to help keep the group alive. Meanwhile, Rick and the others who stay behind must deal with the recent losses while trying to preserve what remains. Check it out:

The Walking Dead airs Sundays at 9/8c on AMC.