Continuity mistake: On several occasions, time seems to pass very fast. People leave one place in the daytime, cross town, and arrive at night, even though it is said that the dome is about 10 miles in diameter. It would not take this long to cross town by car.
Under the Dome (2013)
1 continuity mistake in Season 1 generally - chronological order
Starring: Mike Vogel, Colin Ford, Aisha Hinds, Alexander Koch
The Red Door - S2-E9
Continuity mistake: When Big Jim communicates to the military commander at the dome, he writes on his notepad, and shows "Me and my son" to the commander; yet when he returns to his car and looks at it again, it's written quite differently. (00:24:05 - 00:24:45)
Trivia: Stephen King has a cameo as the old man asking for coffee. (00:34:35)