Under The Dome

The residents of Chester's Mill appear both inside and outside the Dome following their mysterious encounter in the tunnels beneath the town.

As the Dome begins to reveal its ultimate agenda, the townspeople are forced to question what and whom they can trust as fresh threats appear, new residents emerge and surprising alliances form.

The residents of Chester's Mill try to move on with their lives in the aftermath of their mysterious experience in the tunnels beneath town. Marg Helgenberger and Kylie Bunbury guest star.

Under the guise of helping Chester's Mill rebuild, Christine (Marg Helgenberger) urges the townspeople towards specific individuals and projects that remind them of their experience in the tunnels.

Big Jim and Julia form a tentative alliance to search for proof that will discredit Christine, which leads them to new information about the Dome's capabilities.

When Big Jim is captured by Aktaion, the dangerous private corporation that's descended on Chester's Mill to harness the Dome's energy capabilities, he's forced to manipulate Christine (Marg Helgenberber) for information about her agenda.

As the world outside the Dome is rocked by a catastrophic meteor shower, unexpected alliances form inside the barrier. Eva tries to indoctrinate Barbie deeper into The Kinship and Big Jim and Julia turn to one another while isolated on Bird Island outside of town.

Big Jim, Julia, Joe, Norrie and Hunter join together to form a resistance against Christine (Marg Helgenberger), who is mobilizing residents to work on a massive excavation project in the caves underneath the town.

Big Jim and Julia devise plans to end Christine's (Marg Helgenberger) control over the town by initiating a life-or-death plot involving Barbie and Eva, while Joe and Norrie conduct research to better understand the Dome's ultimate agenda.

The Resistance, the citizen not under Christine's (Marg Helgenberger) control, join forces with an unexpected ally: Hektor Martin (Eriq La Salle), the nefarious head of Aktaion. Despite Hektor revealing more about the Dome's origins and helping to strike back at it, Big Jim and Julia still worry he will betray them.

Members of The Resistance race to release their loved ones from Christine's (Marg Helgenberger) influence before she reaches her end game for the Dome. While Barbie risks everything in an attempt to free Eva from the Kinship, Big Jim and Julia are enlisted by Hektor (Eriq La Salle), the head of Aktaion, to test a possible cure for infected townspeople.

When the Dome's calcification process accelerates, Chester's Mill has 24 hours before the barrier's breakdown will suffocate everyone inside. While the new deadline puts added pressure on Joe to bring the Dome down, Barbie and Julia race to save his child from The Kinship.

The Resistance, led by Barbie, Julia and Big Jim, makes a final attempt to protect the outside world from the infected townspeople in The Kinship, including Sam and Junior, and their new queen, Dawn.