VIDEO: Sneak Peek - Visiting Day on the Next UNDER THE DOME

On the next episode of CBS's UNDER THE DOME titled "Blue on Blue" – The Chester's Mill residents receive an unexpected visit from their loved ones on the other side.

Meanwhile, the community braces for a threat from outside the Dome. The episode airs Monday, July 22(10:00-11:00 PM, ET/PT) on the CBS Television Network. Get a sneak peek below!

UNDER THE DOME, a new 13-episode serialized drama based on Stephen King's best-selling novel, is the story of a small town that is suddenly and inexplicably sealed off from the rest of the world by an enormous transparent dome.  The town's inhabitants must deal with surviving the post-apocalyptic conditions while searching for answers about the dome, where it came from and if and when it will go away.