Furthermore, some programs are not beneficial for us. Some of them are not suitable for children, because they are too violent or immoral. Of course they're not good for adults, but children are easier to be influenced by them. I was surprised to know that many parents had not set any rules on time limits for watching TV for their children although they don't want their children to watch such programs. I think it's not only a waste of time, but also dangerous for them.
In brief, I think TV is good for us because it gives us relaxation and knowledge. On the other hand, it's harmful for us if we don't consider the content and time. Therefore, we should decide what to watch and how long to watch TV beforehand or it can be a total waste of time.