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Jolene Purdy as Dodee Weaver (Season 1)
Dodee is Phil's brainy engineer, and possesses technical skills unmatched by anyone in the dome, which proves to be a great resource.){kind=link}
Eddie Cahill as Sam Verdreaux (Season 2)
Sam is Junior's uncle and Big Jim's brother-in-law. He first appears to help Julia rescue a mysterious young woman from drowning in a lake. Is she the key to unlock a secret from his past that he doesn't want anyone to know?
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Karla Crome as Rebecca Pine (Season 2)
Rebecca is a local high school science teacher who's tracking the Dome's activity and using her scientific knowledge to try to understand its patterns. She quickly becomes Big Jim's right-hand woman, and her cold, calculating approach leads him to consider the unthinkable.
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