Rachelle Lefevre appeared on Access Hollywood Live and confirmed that the mystery of the dome in CBS’ “Under the Dome” is going to be explained. “That mystery will get revealed as time goes on, but basically… it’s not just the dome, but it’s what it represents and what its purpose is, which is sort of the larger mystery. So first, you’ll find out what it is and then why it’s there and what its purpose is.”
She also said that Stephen King had been to the set several times, and he is hard at work writing the first episode of season two. In fact, she suggested changes in the plot came when King signed on to do the episode.
Lefevre quoted King, "Look , if you do a series, you can make changes and it can continue on, and he said, for him, it was a chance to explore what would’ve happened to these characters that he created should they have been in this situation for a lot longer and things got even worse,"
She compared the story to William Golding's Lord of the Flies, when society breaks down and the bullies rule. Well, in Lord of the Flies, it was as simple as a plane crash on an island. Under the Dome is a little more complicated than Lord of the Flies!