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The Best Episodes of Under the Dome Season 3

Every episode of Under the Dome Season 3 ranked from best to worst. Discover the Best Episodes of Under the Dome Season 3!

Binge this in 9h 14m•Peaking at 7.0/10

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

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Episode Rankings

  1. #1 Fan Favorite
    Under the Dome Season 3 Episode 7 - Ejecta
    7.0/10(1027 votes)

    S3:E7

    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. Also, Joe is forced to accept help from Sam, the man who killed his sister.

    Director:David Barrett
    Writer:Peter Calloway

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  2. Under the Dome Season 3 Episode 9 - Plan B
    6.7/10(958 votes)

    S3:E9

    Big Jim and Julia devise plans to end Christine’s 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. Meanwhile, Hunter finds more information about the true head of Aktaion, the nefarious private corporation that wants to harness the Dome’s energy.

    Director:Eriq La Salle
    Writers:Mark Bruner, Tim Schlattmann

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  3. Under the Dome Season 3 Episode 6 - Caged
    6.6/10(1005 votes)

    S3:E6

    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 for information about her agenda. Also, when Joe and Norrie question the town’s new rules, they find themselves in a dangerous face-off with the increasingly unstable residents.

    Director:Sergio Mimica-Gezzan
    Writer:Andres Fischer-Centeno

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  4. Under the Dome Season 3 Episode 2 - But I'm Not
    6.5/10(1192 votes)

    S3:E2

    Barbie investigates Ben's claim that something strange is going on in Chester's Mill, but Eva surprises him with unexpected news. Meanwhile, Norrie and Hunter grow closer, and Christine advises Joe to move on.

    Director:Peter Weller
    Writer:Tim Schlattmann

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  5. Under the Dome Season 3 Episode 5 - Alaska
    6.5/10(1013 votes)

    S3:E5

    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. Meanwhile, when tensions run high in town and threaten Christine’s leadership, she puts a plan in play that has deadly consequences.

    Director:David Barrett
    Writer:Bronwyn Garrity

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  6. Under the Dome Season 3 Episode 8 - Breaking Point
    6.5/10(944 votes)

    S3:E8

    Big Jim, Julia, Joe, Norrie and Hunter join together to form a resistance against Christine, who is mobilizing residents to work on a massive excavation project in the caves underneath the town. Also, Hunter uses his tech skills to contact the outside world.

    Director:Sam Hill
    Writers:James C. Oliver, Sharla Oliver

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  7. Under the Dome Season 3 Episode 10 - Legacy
    6.5/10(905 votes)

    S3:E10

    The Resistance, the citizens not under Christine’s control, join forces with an unexpected ally: Hektor Martin, 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. Meanwhile, Hunter receives encrypted files that give disturbing insights into the final effect the Dome will have on the infected townspeople.

    Director:Dennie Gordon
    Writers:Andres Fischer-Centeno, Alexandra McNally

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  8. Under the Dome Season 3 Episode 4 - The Kinship
    6.4/10(1051 votes)

    S3:E4

    Under the guise of helping Chester’s Mill rebuild, Christine urges the townspeople towards specific individuals and projects that remind them of their experience in the tunnels. Also, Julia and Big Jim make shocking discoveries that reveal a new threat within the Dome.

    Director:Edward Ornelas
    Writer:Cathryn Humphris

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  9. Under the Dome Season 3 Episode 11 - Love is a Battlefield
    6.4/10(912 votes)

    S3:E11

    Members of The Resistance race to release their loved ones from Christine’s 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, the head of Aktaion, to test a possible cure for infected townspeople. Also, Joe chooses to work with Christine after she shares some shocking information about the entity behind the Dome.

    Director:Lee Rose
    Writers:Adam Stein, Peter Calloway

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  10. Under the Dome Season 3 Episode 3 - Redux
    6.3/10(1084 votes)

    S3:E3

    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. Meanwhile, Big Jim suspects new residents Christine and Eva are keeping secrets concerning the Dome.

    Director:Olatunde Osunsanmi
    Writer:Alexandra McNally

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  11. Under the Dome Season 3 Episode 12 - Incandescence
    6.3/10(914 votes)

    S3:E12

    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. Also, Big Jim tries to manage the increasingly volatile Hektor, who is adamant that infected townspeople never escape the Dome.

    Director:P.J. Pesce
    Writers:Cathryn Humphris, Bronwyn Garrity

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  12. Under the Dome Season 3 Episode 1 - Move On
    6.2/10(1468 votes)

    S3:E1

    A year after the dome disappears, Barbie, Joe, and the other townspeople gather for a memorial. A year earlier, Julia and Junior try to rescue Barbie and the others, but run afoul of Big Jim.

    Director:Peter Leto
    Writer:Adam Stein

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  13. Under the Dome Season 3 Episode 13 - The Enemy Within
    6.1/10(1109 votes)

    S3:E13

    Series Finale: As the Dome in Chester's Mill comes down, the Resistance makes a final attempt to protect the outside world from the infected townspeople in the Kinship and their new queen.

    Director:Peter Leto
    Writers:Tim Schlattmann, Neal Baer

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Season 3 Ratings Summary

"Ejecta" is the best rated episode of "Under the Dome" season 3. It scored 7/10 based on 1027 votes. Directed by David Barrett and written by Peter Calloway, it aired on 7/30/2015. This episode is rated 0.3 points higher than the second-best, "Plan B".