CBS announced today that the Dome in Chester's Mill will come down and its mysteries revealed during the series finale of Under the Dome on Thursday, Sept. 10. Based on Stephen King's bestselling novel, Under the Dome debuted Monday, June 24, 2013 and has been one of the most-watched shows on television for the past three summers. In the series finale, when the Dome comes down, many questions about its origin and power will be answered, as two groups of residents engage in one final conflict that some won't survive. Here's what Nina Tassler, Chairman, CBS Entertainment, had to say in a statement.

"Two years ago, Under the Dome broke new ground in the summer and became an instant hit on CBS, as well as with viewers around the world. Dome's event storytelling and multi-platform business model paved the way for more original summer programming with the successful rollouts of Extant and Zoo. We're excited to present the final chapter in Chester's Mill as the story comes full circle, with the Dome coming down as dramatically as it went up."

All three seasons of Under the Dome will continue to be available for unlimited streaming to fans and members of Amazon's Prime Video, which has been the exclusive subscription video on demand (SVOD) home for Dome since the show premiered Under the Dome tells the story of a small town that is suddenly and inexplicably sealed off from the rest of the world by an enormous transparent dome. Combating Dome and man-made threats daily, the residents of Chester's Mill rose to new heights of ingenuity, courage and, for some, darkness, in order to survive their post-apocalyptic isolation.

Mike Vogel, Rachelle Lefevre, Dean Norris, Eddie Cahill, Alexander Koch, Colin Ford, Mackenzie Lintz and Kylie Bunbury star. Under the Dome is produced by CBS Television Studios and Amblin Television. Steven Spielberg, Neal Baer, Justin Falvey, Darryl Frank, Stacey Snider, Timothy Schlattmann and Peter Leto are executive producers. Under the Dome premiered to some of the highest summer ratings in several years when it debuted in the summer of 2013.

The show was quickly renewed for a second season, but the ratings started to dip last summer. Under the Dome averaged 2.7 rating in adults 18-49 and 11.2 million viewers overall in Season 1, dropping to an average of 1.6 demo rating and 7.2 million viewers overall. This season, the show is averaging a 1.0 rating in the 18-49 demo and 4.9 million viewers overall. Take a look at the new trailer for the last two episodes of the series, airing Thursday, September 3 and Thursday, September 10 on CBS.