Terra Nova is a US Science Fiction show which mixes time travel and dinosaurs with a fairly standard US network style of story. With Steven Spielberg as an executive producer, you can rightly expect glossy production values, but with the main producers being veterans of the Star Trek franchise, you also get some slightly woolly plotting and a lack of any real edge.
It is 2149, and humanity has polluted the Earth beyond recovery. Policeman Jim Shannon, and his doctor wife Elisabeth, have illegally had a third child, and Jim is thrown into jail. Luckily for the Shannon family, and Earth, a portal to the Cretaceous period has been found, and people are being sent back to make a new life on this new earth. The family are chosen to travel back, and the pilot episode sees Jim making a daring jailbreak to join his family, smuggling their illegal third child in too. Again luckily, once they get back to this new earth, Terra Nova, no-one really cares about their crimes, and they are given a nice house and jobs in the colony.
Back in the past, Terra Nova is a small town, fenced in against the dangers of dinosaurs, trying to carve out a new life and make space for more colonists. The town leader is Commander Taylor, the first man to travel here, who is old, wiry, and tough as a rock. Other characters include scientists studying the new world, teenagers trying to have fun when surrounded by dinosaurs who might eat them, the soldiers protecting the colony, and rebels. Yes, all is not well in paradise: a renegade group called "Sixers" are living in the jungle and harassing the colony, for reasons that slowly become clear.
For me, the idea of a colony scrambling to survive in a hostile world full of dinosaurs had real potential for some gritty plot and strong characters. Unfortunately, Terra Nova is a very "nice" show, and while characters do get in danger every now and again, they always get to go back to their nice houses in the compound at the end of the day. The military have sonic guns, so no people or dinosaurs are ever really hurt. Several episodes feature science plots, which are solved by characters standing around well-equipped labs and talking. Most episodes feature the classic US TV pattern of the A plot, where something dramatic is solved, and the B plot, where a character deals with something minor. The worst episodes are basically just "Star Trek: Voyager" with dinosaurs.
That said, there are some good episodes. One set in a remote station where everyone is suffering memory loss is well played, and there are some good dramatic dinosaur chases. Terra Nova certainly shows that you can do Jurassic Park on a TV budget. There's a central plot arc, involving the Sixers and mysterious attempts to manipulate the time gate, which has some potential, and of course there's the big 2-part finale that genuinely tries to shake things up.
Overall, Terra Nova is well made, with acceptable acting and writing, but never tries to break out of the safety zone.