Maybe they don't realize how far back in time they actually went?http://en.wikipedia.org/wiki/Terra_Nova_%28TV_series%29The show is set in the year 2149 when all life on the planet Earth is being threatened with extinction. Scientists have opened a door allowing people to travel back to prehistoric times. The Shannon family (father Jim, his wife Elisabeth, and their three children Josh, Maddy and Zoe) join the tenth pilgrimage of settlers to Terra Nova, the first human colony on the other side of the temporal doorway. However, they did not realize that they placed it in the middle of a group of carnivores.
They're not only time-travellers, those people are coming from the friggin future.
The premise sounds a bit like "Earth 2 meets Jurassic Park", actually.
The premise of the show blows my mind. They are headed to the past to avoid extinction. They're not going to develop a long lasting civilization in the age of the dinosaurs. The dinos themselves were wiped out by an extinction level event.