James "Big Jim" Rennie is the main antagonist of Stephen King's Under the Dome and appeared as one of the main antagonists in its TV show adaptation. However, unlike his original counterpart, he went from the main antagonist to the anti-hero in the final season of the show.
He is portrayed by Dean Norris.
In the Season 2 finale, when his wife Pauline died after requesting Rebecca to inject her with morphine, Big Jim began to go on a rampage by killing Rebecca, then killing Andrea Grinnell. He then tried to kill Julia who witnessed Andrea's murder, but she stabbed him in the foot and ran off to escape. He tried to chase her but was intercepted by Junior who confronted him about his actions since Pauline's death. Junior then shot his father in the chest and ran to the crater to catch up with the rest of the town members, presumably leaving Big Jim, still weak from the gunshot wound and the stab wound in the foot, to be crushed by the shrinking dome.
In Season 3, Big Jim made a dramatic change in his personality, becoming an anti-hero in the process. Many fans believe was that it was because having a dog named Indy made him see the errors of his ways. He eventually formed a group called "The Resistance" in an effort to stop the infected townspeople. When the dome came down, he attempts to shoot Dawn only to get tackled by Junior who was infected, and they get into a fight. Just as Junior was about to finish him off, Indy distracts Junior long enough for Big Jim to regain control of the knife. Even after he begs Junior not to make him kill him, he fatally stabs his son, anyway. He then cradles Junior's body in tears.
One year later, Big Jim becomes a Congressman from another town, and brought Barbie and Julia and the rest of the Resistance (except for Norrie who was in the army, and Joe who was among the infected people quarantined by the army) to his office with news that Dawn is still alive thanks to a security camera.
- Lester Coggins (deceased; murder)
- Boomer Platt (deceased; murder)
- Agatha Seagrave (deceased; left her to drown)
- Otto Aguilar (deceased; murder)
- Maxine Seagrave (deceased; murder)
- Dodee Weaver (deceased; murder)
- Dale "Barbie" Barbara (attempted; failed; formerly)
- Lyle Chumley (deceased; murder)
- Rebecca Pine (deceased; murder)
- Andrea Grinnell (deceased; murder)
- Julia Shumway (attempted; failed; formerly)
- Dr. Marston (deceased)
- Carolyn Hill (deceased; accidentally)
- Hektor Martin (deceased; saved Joe and Norrie)
- Kyle Lee (deceased; self-defense)
- Dawn (attempted; failed)
- James Rennie, Jr. (deceased; self-defense)
A Good Marriage
Cain Rose Up
Cycle of the Werewolf
From a Buick 8
Gwendy's Button Box
In The Tall Grass
Lunch at the Gotham Café
Secret Window, Secret Garden
Storm of the Century
The Dark Half
The Dark Tower
The Diary of Ellen Rimbauer
The Gingerbread Girl
The Night Flier
Why We're In Vietnam