FleshEatingZipper says: "In the opening shots of Terra Nova, we’re shown an Earth on the brink of collapse: a sky full of deadly brown smoke, people being forced to use rebreathers indoors until they get into oxygen-friendly safe zones and, y’know, dystopia. It’s like Al Gore’s greatest dream accomplished, this is what you have done to the Earth, humanity! he would say. Jim Shannon and his family are enjoying the rare treat of an orange when the five-oh stop in and find his young, third child (which is strictly verboten in the 22nd century, it turns out). Shannon goes to prison and through some trickery, ends up back with his family on their way through a time portal to Terra Nova. On the other side? A trip back 85 million years. And dinosaurs."