So, having never seen the show nor any promos for it nor any printed material, here's my understanding of "The Walking Dead".
There's zombies. They are chasing non-zombies, only they don't move very fast. All they really want to do is eat the non-zombies. I am not sure if eating a non-zombie creates a new zombie, so this part confuses me. Like, I know a vampire kills a non vampire and sometimes they become vampires. Is that the case here? Also, I think there are motor cycle gangs, but that might be Sons of Anarchy. I also think this show takes place in Youngstown, OH.