Under the Dome to end this season 

CBS has officially decided to not order a fourth season of the series, which is based on the Stephen King bestseller about a Maine town suddenly trapped under a mysterious force field. 

Instead, the Sept. 10 finale will serve as a series ender. 

broke new ground in the summer and became an instant hit on CBS, as well as with viewers around the world,” said Nina Tassler, chairman, CBS Entertainment. “

’s event storytelling and multi-platform business model paved the way for more original summer programming with the successful rollouts of

. We’re excited to present the final chapter in Chester’s Mill as the story comes full circle, with the

Previously Tassler had teased that the dome was going to come down at the end of the season. The network also revealed the closer will chronicle “two groups of residents engage in one final conflict that some won’t survive” and that the dome’s “mysterious origins will be revealed.” We’re told there are no plans to shop 

 around to other potential networks or streaming companies. 

The verdicts are not yet in on the other two CBS summer shows Tassler mentioned — the sophomore drama 

. Just looking at the ratings, one would have expected

, the odds for the two remaining shows just went up (especially for

 was originally conceived as a limited series, then producers had to figure out how to keep the story going when CBS decided to order another round. So for producers to have kept 

•Julia, Big Jim, and Hektor argue whether a cure can work in exclusive Under the Dome clip

•Junior tries to make Joe help the kinship (by beating him up) in exclusive Under the Dome clip

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