Under the Dome Season 3

Many of the residents of Chester's Mill, Maine are attending a parade a few towns away from Chester's Mill. Dale Barbara leaves the woods after burying a body only to discover that he can't leave town. He's the first to discover that there's an invisible barrier blocking his exit. Residents soon realize that this mysterious barrier is a dome that is covering the entire town of Chester's Mill. Sound doesn't penetrate the barrier. Nobody can leave and no one can enter the town. Resident's must figure out where the dome came from, and how to get rid of it.