The animals act strangely at the Chenoweths' farm; the family and neighbors search for missing Arlo.

With no cell service or electricity, the Chenoweths and their neighbors desperately seek help.

After learning a devastating secret about his wife, Ruben joins James to seek help at the Navarro farm; Arlo reveals the terrifying reality of their situation and leads Meryl and Nicholas into the woods.

James and Ruben are held captive at the Navarro farm; on their way back from the woods, Arlo, Meryl and Nicholas encounter McNab, a mysterious man who claims to help, but whose true intentions remain unclear.

Travis, holding James hostage, recounts how he was shot and took refuge in the Navarros' basement; James realizes the imminent danger to his family.

James, Ruben and the kids bring a wounded McNab back to the Chenoweths'; James has a chilling realization about his mother and her recent actions.

Suspicions grow as the group realizes one of their own poses a deadly threat to Arlo; Donald joins Ruben on a mission to settle unfinished business at the Navarro farm; Maggie contemplates the unthinkable.

After discovering who among them is after Arlo, Maggie and James resort to the unthinkable to save their family and neighbors.