Walking Dead isnt as good as what it use to be...season 2 and more so season 3 were a bit lacking. When a zombie movie/series feels like its settled to a formula then it completely loses the plot. Thats why its pretty hard to do a post apocolyptic zombie tv series and keep it good over multiple series. A series like this should be written with 3 seasons in mind and then ended. That should account for good story and pacing throughout.
But then again almost every series loses something after the first few series...breaking bad included. Hell even game of thrones...







