The cast and crew of "The Walking Dead" are back at work and giving a sneak peek at the zombie drama's upcoming fifth season.
"This episode is so disturbing," said actress Lauren Cohan, who plays Maggie Greene. "Some of the the stuff they shot yesterday, I don't know if it'll make it to TV."
Andrew Lincoln, who plays Rick Grimes, echoed her sentiments, calling the premiere "the most ambitious first episode I think we've ever attempted."
"It moves like no other premiere we shot before," he added. "If this is what we have to go by for the season, then I think this will be the best season yet."
Lincoln also hinted that this season will have much to do with hierarchy. Grimes and the group were all separated for much of season 4. Now that they're back all together, he says, each character will have to figure out where he or she stands in the group.
"The Walking Dead" returns this fall. Watch the behind-the-scenes video below: