The survivors square off against radioactive zombies when they arrive in a South Dakota town that’s on the brink of nuclear disaster.

Murphy is kidnapped by a group of outlaws trying to crack the “Fort Knox of Oxycontin.” As the survivors battle drug-enhanced zombies, a startling discovery is made about Murphy’s abilities.

As they travel across Nebraska, the group finds themselves trapped in a morgue as a literal zombie tsunami engulfs them; at the same time, Citizen Z gets a visitor who…

In New Jersey, the survivors run out of fuel and embark on a dangerous mission to replenish their supply. Meanwhile, Cassandra’s past comes back to haunt her.

What’s worse than a zombie? An army of zombies (as in, literally a zombie army). Plus, 10K’s mysterious past revealed.

The survivors visit Warren’s home town in Central Illinois, but will they find her long missing husband? Oh, yeah – there’s also a zombie tornado that leaves everyone in danger.

Everyone tries to escape the impending nuclear blast; Citizen Z battles thawed zombies and issues an air bounty for Murphy.