Been following this one for a while, the Steven Spielberg-produced dinosaur and time travelling show Terra Nova. Terra Nova will air on FOX on Mondays this Fall, and the show "follows an ordinary family on an incredible journey back in time to prehistoric Earth as a small part of a daring experiment to save the human race." The shows story line seems a lot better than most science fiction setups, with scientists finding a fracture in time that makes it possible to construct a portal into primeval history. The idea behind this is to rebuild civilisation and 'get it right this time'.
The trailer doesn't look too bad at all with some surprisingly good special FX and features an actor I loved on Life on Mars, Jason O'Mara. The show is out this fall and I'm sure after you watch that trailer it'll be on your list of things to watch for sure.