The BEST episodes of Under the Dome season 3

Every episode of Under the Dome season 3, ranked from best to worst by thousands of votes from fans of the show. The best episodes of Under the Dome season 3!

An invisible and mysterious force field descends upon a small fictional town in the United States, trapping residents inside, cut off from the rest of civilization. The trapped townsfolk must discover the secrets and purpose of the "dome" and its origins, while coming to learn more than they ever knew about each other.

Last Updated: 12/3/2024Network: CBSStatus: Ended
Ejecta
star
7.43
2076 votes

#1 - Ejecta

Season 3 - Episode 7 - Aired 7/30/2015

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.

Directors: David Barrett
Watch Now:Amazon
Alaska
star
7.36
2135 votes

#2 - Alaska

Season 3 - Episode 5 - Aired 7/16/2015

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.

Directors: David Barrett
Watch Now:Amazon
Breaking Point
star
7.32
1909 votes

#3 - Breaking Point

Season 3 - Episode 8 - Aired 8/6/2015

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.

Directors: Sam Hill
Watch Now:Amazon
Plan B
star
7.31
1968 votes

#4 - Plan B

Season 3 - Episode 9 - Aired 8/13/2015

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.

Directors: Eriq La Salle
Watch Now:Amazon
Legacy
star
7.30
1942 votes

#5 - Legacy

Season 3 - Episode 10 - Aired 8/20/2015

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.

Directors: Dennie Gordon
Watch Now:Amazon
Caged
star
7.27
2082 votes

#6 - Caged

Season 3 - Episode 6 - Aired 7/23/2015

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.

Watch Now:Amazon
The Kinship
star
7.26
2224 votes

#7 - The Kinship

Season 3 - Episode 4 - Aired 7/9/2015

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.

Directors: Edward Ornelas
Watch Now:Amazon
Redux
star
7.19
2289 votes

#8 - Redux

Season 3 - Episode 3 - Aired 7/2/2015

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.

Watch Now:Amazon
But I'm Not
star
7.19
1557 votes

#9 - But I'm Not

Season 3 - Episode 2 - Aired 6/25/2015

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.

Directors: Peter Weller
Writer: Adam Stein
Watch Now:Amazon
Incandescence
star
7.19
2057 votes

#10 - Incandescence

Season 3 - Episode 12 - Aired 9/3/2015

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.

Directors: P.J. Pesce
Watch Now:Amazon
The Enemy Within
star
7.17
1958 votes

#11 - The Enemy Within

Season 3 - Episode 13 - Aired 9/10/2015

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.

Directors: Peter Leto
Watch Now:Amazon
Move On
star
7.11
2354 votes

#12 - Move On

Season 3 - Episode 1 - Aired 6/25/2015

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.

Directors: Peter Leto
Watch Now:Amazon
Love is a Battlefield
star
7.09
2054 votes

#13 - Love is a Battlefield

Season 3 - Episode 11 - Aired 8/27/2015

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.

Directors: Lee Rose
Watch Now:Amazon