"It's a greenhouse," said Marcus, a retired engineer who taught shop class at the high school. He was drawing diagrams on a chalkboard, his hands shaking. "We're in a terrarium. The CO2 levels are rising. If the barrier doesn't let air through, we have maybe two weeks before we start getting dizzy. Three before we pass out. Four before we don't wake up."

Q: Can I purchase Under the Dome Season 1 on DVD or digital platforms? A: Yes, you can buy individual episodes or the complete season on DVD or digital platforms like Amazon Prime Video, Google Play, or iTunes.

Q: Is Under the Dome based on a true story? A: The show is based on a novel by Stephen King, but it's not a true story.

This is the only truly complete and legal “free download” method, albeit time-limited.