Characters: Under the Dome
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Dale "Barbie" Barbara
Played by: Mike Vogel
- Aloof Ally: He and Big Jim start out as this. They evolve into full out enemies, by the end of season 1.
- Badass: Even lampshaded by Maxine in episode 10;
- Deadpan Snarker
- Easily Forgiven: Julia doesn't seem as upset as you'd expect when she finds out that Barbie killed her husband and then lied to her about it.
- Fall Guy: Big Jim frames him for all of the murders that he committed. Technically, he did kill Dr. Shumway, but it was in self defence. Dr. Shumway pulled a gun on Barbie during a fight over the former's gambling debts, which the latter was trying to collect. Big Jim calls it murder.
- Convicted by Public Opinion: To the point where no-one even questions Big Jim's word against his. When he utters a plea of "Not Guilty" during the Kangaroo Court held for him, the townspeople don't even bother to hear his side of the story and intead jump straight to building a gallows.
- Gender-Blender Name: Well, nickname, technically
- Heroes Want Redheads
- Loan Shark: Worked as one under Maxine Seagrave.
- Sympathetic Murderer: Of Peter Shumway, in self-defense.
- White Male Lead
Big Jim Rennie
- A God Am I: Not quite a God, but his ego combined with his realization that his wife predicted the Dome coming has convinced Jim that he and his family have been chosen by divine providence to lead the town.
- Affably Evil: For a murderous, power-hungry councilman, Big Jim is actually pretty friendly if you're on his good side.
- Aloof Ally: To Barbie, early on.
- A Real Man Is a Killer: If his speech to Agatha Seagrave is any indication.
- Bald of Evil
- Big Bad
- Chronic Backstabbing Disorder
- Despotism Justifies the Means: Holds this view.
- Even Evil Has Loved Ones: Before going off to kill Maxine, Big Jim tells Junior to stay at home with an almost tearful farewell that makes you wonder if Big Jim knows he might not come back alive.
- I've Come Too Far: Most of the murders he commits are Asshole Victims in their own right, but his cold-blooded killing of Dodee after she hears the military chatter discussing his murder of the Reverend, sets him into full villain territory.
- I Own This Town: Pretty much sums up his entire character motivation to a tee.
- Judge, Jury, and Executioner: Comes across as this increasingly more as the series progresses.
- Hanging Judge: In the season one finale he orders a gallows be built to execute Barbie.
- Kick the Son of a Bitch: His killing Maxine and Agatha Seagrave both come across as this.
- Manipulative Bastard
- Morality Pet: His son Junior, and also Rose.
- Protagonist Journey to Villain: He gets progressively more villainous as the series goes on.
- Small Name, Big Ego: Snarkily lampshaded by Norrie, who points out that for a man calling himself "Big Jim", he's really just a petty man who is not above threatening kids to satisfy his need to feel powerful and important.
- Skewed Priorities: Starts making a power grab the very day the Dome comes down.
- Villainous Valor: No matter what we think of Big Jim's motives and methods, he is no coward. He leads from the front and often puts himself in danger to save others.
- Villain with Good Publicity: A rare example in that the villain actually deserves the publicity. The show makes it clear that Big Jim is a pretty terrible human being... but the town is only seeing him handle potentially serious crises with a level head, and he has saved a lot of lives through his efforts.
Played by: Rachelle Lefevre
Played by: Colin Ford
- Adopt the Dog: Quite literally. He adopts a dog named Truman, who was separated from his owner when the Dome came down and... separated him.
- Adorkable: Particularly once Norrie starts returning his affections.
- Cannot Keep a Secret: Much like his sister, he cannot help but let slip information he was trying to hide.
- Captain Obvious: Has a tendency to say things that are blindingly obvious to anyone with eyes
- Hollywood Nerd
- Teen Genius: While he's a veritable fount of knowledge, his maturity level is still clearly that of a teenage boy.
- Totally Radical: Though not nearly as often as his buddy, Ben.
Played by: Mackenzie Lintz
Played by: Britt Robertson
- Break the Cutie: Thanks to being locked in the Rennies fallout shelter for nearly a week.
- Cannot Keep a Secret: Like her brother, she cannot help but let slip information she was trying to hide.
- The Chew Toy: Quoth many a fan of the show, "Can't she catch a break?"
- Damsel in Distress: For the first third of season one.
- The Lancer: To Barbie when he's on the run from the rest of the town
- Ms. Fanservice
- Show Some Leg: Pulls this on Junior to get him out of the way, so Barbie can rescue Julia.
- Spared by the Adaptation: Dies very early on in the book, but is a major character in the show. Subverted as of Season 2, where she is brutally killed by an ax-wielding assailant in the final moments of the premiere.
James "Junior" Rennie
Played by: Alexander Koch
Big Jim's questionably sane son. Deputized by Linda shortly after the Dome appeared.
- Antagonistic Offspring: Subverted. He at first appears to betray his dad to side with Ollie Dinsmore, but ends up switching back to his dads side and killing Ollie to save him.
- Axe Crazy: His claims to Angie that the dome coming down have messed with her brain apply much more to himself.
- After being made a deputy, he dials back on the crazy, but still has a strong undercurrent of being unstable.
- Crazy Jealous Guy: After Angie breaks up with him, he follows her around, sees her bumming a smoke off another guy, and decides to kidnap her and keep her locked up in his bomb shelter—for her own good, of course, because the dome coming down clearly scrambled her brains and made her stop loving him, so he has to keep her safe until it lifts. He also tries to Murder the Hypotenuse, only Barbie has no idea what he's talking about and easily kicks his ass.
- Cloud Cuckoolander
- Creepy Monotone
- The Dragon: To Big Jim, and briefly to Ollie Dinsmore.
- Even Bad Men Love Their Mamas
- Even Evil Has Loved Ones: Seemed pretty upset after receiving the vision from the Dome of Big Jim with stab wounds with he and the other kids holding bloody knives. After seeing that, his first impulse is to go find Big Jim and warn him that he might be in danger.
- His entire reasoning for keeping Angie locked up, twisted as it might have been, was due to his concern the Dome was "making her sick".
- Heel-Face Revolving Door: He shifts between being a good guy and a bad guy depending on the situation.
- In the Blood
- It's All About Me: Seems to be under the impression that anyone who says anything that disagrees with his views is either lying or crazy.
- Morality Pet: To Big Jim.
- Police Brutality: Likes to partake in a bit of this.
- Sanity Slippage: Suffers one pretty early on.
- Stalker with a Crush: To Angie.
- Teens Are Monsters
- Teeth-Clenched Teamwork: Often gets forced to work with Barbie, a man who he distrusts and dislikes. Later, he ends up having to help the other three Hands, even when his goals and theirs are fundamentally incompatible.
- Token Evil Teammate: For Joe, Norrie, and Angie, when it's revealed that he's the Fourth Hand. This means that they often need his help even when they're working at cross purposes from each other.
- "Well Done, Son!" Guy
Played by: Natalie Martinez
- Authority in Name Only: As Sheriff, she technically outranks Big Jim, but it's clear to everyone who's really in charge.
- The Dragon: Becomes one to Big Jim gradually, although she doesn't realize he's the Big Bad, and so therefore doesn't realize she's the Dragon
- The Guards Must Be Crazy: Makes several bad decisions during her tenure as sheriff of Chester's Mill. She starts to make some better decisions in Season 2, just shortly before her death.
- Heroic Sacrifice: Gives her life to save Barbie from being flattened by Big Jim's SUV when the Dome becomes magnetized.
- Locked Out of the Loop: Duke Perkins kept her in the dark about the drug trade he was involved in to keep her safe.
- Inspector Javert: Towards Barbie near the end of season 1.
- Police Are Useless: Despite any good intentions, she's clearly not cut out for the position of Sheriff, due to an inability to keep a leash on her deputies, and being bossed around by Big Jim, whom she technically outranks.
- Unwitting Pawn: Of Big Jim.
Played by: Nicholas Strong
- It's Personal: Dodee's death does this to him.
- Nice Guy: Starts out as this.
- Unwitting Pawn: To Big Jim, who he fully supports in wanting to execute Barbie for the murder of Dodee. What he doesn't realise is that the real murderer is Big Jim himself.
Played by: Jolene Purdy
Played by: Aisha Hinds
Played by: Samantha Mathis
- A Form You Are Comfortable With: The Dome takes her shape on multiple occasions to communicate with Norrie and the others.
- Hospital Hottie: She's a psychiatrist, but unfortunately is the best the town has for doctors until she dies
Sheriff Duke Perkins
Played by: Natalie Zea
Played by: Beth Broderick
Owner of the local Greasy Spoon
, Sweetbriar Rose, and close friend to Big Jim Rennie.
Played by: John Elvis
Rev. Lester Coggins
Played by: Ned Bellamy
- Axe Crazy: Taking drugs and hearing voices makes him increasingly insane
- Church Militant: Decides it's a good idea to steal and destroy as much of the medicine in town as he can, because he thinks it's God's plan.
- Entertainingly Wrong: He believes God is speaking to him and directing him to the story of "Moab". It later turns out that he was really picking up military com-chatter via his hearing aid, who were attempting to breach the Dome with a "M.O.A.B" strike.
- The Dragon: To Big Jim, until his Heel-Faith Turn.
- Heel-Faith Turn: Regained his faith (and more than a bit of crazy) after the Dome came down. Unusually for this trope, this makes him more of a bad guy rather than less.
- Sinister Minister: For a while.
Big Jim's late wife, and Junior's mother. An aspiring artist who died several years before the series begins. Played by: Sherry Stringfield
- Cassandra Truth: Her attempts to warn her husband, Big Jim, about the Dome were written off as insanity, putting strain on their marriage.
- Driven to Suicide: A particularly nasty argument with Big Jim drove Pauline to commit suicide by crashing her car into a tree. Big Jim and Duke Perkins covered it up and paid off the sole witness to make it look like an accident. Season 2 reveals that she actually faked her death, and is living in another town named Zenith.
- Faking the Dead: Faked her death in a car accident to get away from Big Jim's influence in her life. But ultimately she's...
- Killed Off for Real: In the season 2 finale a mortally wounded (by Lyle) Pauline begs Rebecca to end her suffering. She does, and thanks to Big Jim Rebecca joins Pauline very shortly afterwards.
- Morality Pet: Was this to Big Jim, until her death.
- Posthumous Character: Died several years prior to the series. At least that's what everyone thought.
- Waif Prophet: Apparently had some notion that the Dome and the pink stars were coming.
A hacktivist working to find out what's happening under the dome.