This has been done to death. Made it about halfway through the first episode before I nearly expired from boredom. You've seen 10 zombie apocalypse, you've seen 'em all. It's always the same, the infection occurs and turns the poor sap into a homicidal maniac, who infects anyone hear him. Oh, and the zombies also let out the same hiss in every zombie movie.

Fast forward 20 years, and the survivors can't get along, and are all revolting and/or killing each other. Why they're all fighting each other doesn't make any sense.

And sorry, scriptwriters, car batteries won't last 20 years. Neither will gas.

You've already seen this movie.