This series has done artistic processing treatment, because to play for the general public, on the basis of the real must be done, for the following reasons, in the U.S. series or movies have a very strong rating system is mainly governed by the Motion Picture Association of America, especially after the series was graded directly affect the audience, so in order to ensure that most of the U.S. public can see the play, but also be attracted to the play! That is indeed a very difficult thing, in my humble opinion, I think the show is doing very well, how to attract viewers, 1 zombie make-up degree of finesse, you can download a high-definition try to see, I think all the zombie films in the make-up of the most realistic and best of a 2 plot, drawing on the essence of previous zombie films such as the plot of the 28 days and so on and so on the film have their silhouettes. And put aside the zombies not to say that this is actually a family film, and the human nature of the film. 3 actor's character portrayal, each character character character distinctive independent. And to do so that most people can see, and did the following processing, the gore part of all the artistic processing, so sometimes you will feel the bite of human flesh when it feels very fake, and there is no sex scenes, so the advantage is to let the reviewer gave this episode divided into PG-13 (full name is: PARENTS STRONGLY CAUTIONED Some). Some material may be inappropriate for children under 13 Translation probably means: special counseling level, not suitable for children under 13 years old, 13 to 17 years old children should be accompanied by parents to watch, some content is very inappropriate for children. Movies at this level do not have crude scenes of sustained violence, generally no nudity, and sometimes drug use and swearing.) If the gore part is very real, it is likely to be divided into higher levels, that will lose a large part of the audience (which includes prohibited to watch the underage, and part of the shallow stomach, or other people with different personalities) (specific American Film Institute rating system, please their own Baidu) Answer to your question to add, the director intentionally to create a kind of old man to change the zombies of the illusion is in order to allow the audience to produce a certain emotion, and the audience to feel that the old man is so good to change into zombies. Feel that the old man is a good man just so changed is a pity, and then the director again let the old man came to life, the audience breathed a sigh of relief, the effect achieved.