Z Nation was never a huge ratings hit, but it did respectable business for SYFY, which is why its season 5 cancellation came as a shock. The series may have been canned because the network tends to cap their shows at five seasons max, likely due to the rising costs.

In the first season of Z Nation a team of live people are trying valiantly to move a man who is immune to the zombie virus to a lab across the country. The man the team is moving, Murphy, is very selfish and doesn't really care about humanity one way or another. He is not very cooperative and is very unlikable.

At the end of season 2, Citizen Z decides to leave Northern Light when he realizes that the post's computer systems and equipment have sustained too much damage for him to repair alone. He leaves on foot with Pup, pulling a dog sled, in subzero temperatures.

Z Nation is a counterpoint to serious zombie dramas like Walking Dead. It revels in absurd, high-concept schlock. It also has a ton of off-genre bottle episodes… like dream episodes, musical episodes, what-if episodes, romance episodes, fashion show episodes, political parodies, sideshow episodes, etc.