Believability = Credibility

Talking about those TV shows yesterday made me think about some of the worse moments they had to offer. And when it comes to bad moments in a show or movie, the first thing that comes to my mind is either bad writing or bad acting, and usually, I think, the two come hand in hand. I mean when the writing is bad, usually not even the best actors can save it. It doesn't mean the opposite is true. Good writing can also be acted poorly, but usually, when the writing is good, the acting is a much smoother deal all the way around. In any show, you shouldn't have a character act out of his/her character, and never should any character act in a way that is not consistent with human nature. Unless of course the character is not human. But if the character is human, there are just some things he/she shouldn't do. Not in the real world. Otherwise your story will lack credibility, and believability will go down the drain. And when that happens, so does your story.