Think about all of the different ways you spend your time. Anything which the Bible tells us is wrong is not good to watch as a television show or a movie. Senseless violence and meanness is found on those popular wrestling shows. Many comedy and drama shows act like it is okay to be disrespectful to parents, teachers, police, and others in authority. Some shows pretend that leading a homosexual lifestyle is okay.
Some shows are about witchcraft and magic.
All of these things disgust God. The Bible shows us this. So we shouldn't fill our minds or time with those things. And TV isn't the only thing to be careful with, either. There is a lot of reading material which isn't good for us, either.