A small town is suddenly and inexplicably sealed off from the rest of the world by an enormous transparent dome. While military forces, the government and the media positioned outside of this surrounding barrier attempt to break it down, a small group of people inside attempt to figure out what the dome is, where it came from, and when (and if) it will go away.
The best episode of "Under the Dome" season 2 is "Heads Will Roll", rated 7.2/10 from 1630 user votes. It was directed by Jack Bender and written by Stephen King. "Heads Will Roll" aired on 6/30/2014 and is rated 0.6 point(s) higher than the second highest rated, "Infestation".
Barbie's life is in Big Jim's hands; the dome becomes magnetized; Julia tries to save the life of a mysterious girl who may have clues about the origin of the dome.
Director: Jack Bender
Writer: Stephen King
When Rebecca discovers an infestation of butterfly eggs on the crops, Barbie risks his life to help her save the town's food supply.
Director: Ernest R. Dickerson
Writer: Kelly Souders, Brian Peterson
Big Jim conducts a census to see how long the town can survive on dwindling resources; acid rain threatens everyone.
Director: Peter Leto
Writer: Adam Stein
Rebecca and Big Jim consider extreme measures as the conditions worsen in Chester's Mill; clues about Melanie's connection to the dome are revealed.
Director: Holly Dale
Writer: Alexandra McNally
After Big Jim and Rebecca's plan left the town divided, Julia takes over as the leader of Chester's Mill; Norrie and Joe help Melanie find more clues.
Director: Edward Ornelas
Writer: Cathryn Humphris
A cave-in severs Barbie and Sam's path back to Chester's Mill during their investigation of a mysterious tunnel; a dust storm rages through the town, as Big Jim and Julia face off in a power struggle.
Director: Jack Bender
Writer: Caitlin Parrish
As Barbie descends further into the mysterious tunnel in hope of finding Sam, he comes across a world filled with unanswered questions.
Director: David Barrett
Writer: Peter Calloway
Barbie turns to his father for help contacting Julia but realizes that he may not be trustworthy; Big Jim declares himself sheriff of Chester's Mill.
Director: Jack Bender
Writer: Daniel Truly, Andres Fischer-Centeno
Barbie is apprehended by mysterious men and relentlessly interrogated about the Dome; Big Jim forms a deal that could permanently seal the fate of the Chester's Mill residents.
Director: Peter Weller
Writer: Kelly Souders, Brian Peterson, Adam Stein
Big Jim finally learns what happened to his wife, Pauline; Chester's Mill faces a new threat -- climate change.
Director: Eriq La Salle
Writer: Alexandra McNally, Mark Bruner
Rebecca and Sam try to save Chester's Mill residents as temperatures plunge; Barbie puts his life at risk to help Julia after a terrible accident.
Director: Jack Bender
Writer: Adam Stein, Peter Calloway
The latest threat intensifies, leaving Chester's Mill residents at risk of being crushed to death; Melanie's health declines as the egg's fate remains uncertain.
Director: Peter Leto
Writer: Daniel Truly, William Kendall
Just as the walls start to close in on those trapped in Chester's Mill, a possible exit from the dome is revealed.
Director: Jack Bender
Writer: Caitlin Parrish, Cathryn Humphris