Serenity (movie)
Whedon had to take a television series that not many people had seen and explain the idea of the movie. He had to do this without boring the audience or the fans of the television series. He did this by doing things in the beginning of the movie. At first, it is a just a voice telling what has happened. It then is shown to be a school room where the voice was that of the teacher. They next showed that this was all just memories in one of the character's mind.