The link below is a review of season 1 that pretty much nails it.

My reference to airborne virus is based on a recent comment by one of the suits at AMC in regard to their major hit, "The Walking Dead".

For 2 seasons the show has had huge ratings for a cable network. Instead of capitalizing on their success, they decided they needed to make more money by reducing the FX budget. One of the suits was quoted as saying, "Do we really need to see the zombies? Can't we just hear them sometimes?" Cutting costs is a great idea but denutting a major success is infinite stupidity. Darabont, who fathered the production, walked off, so hopefully saving his salary will allow the show to retain it's momentum.

But I digress, It looks like the decent season finale will not be enough to save TN. It could be picked up by a cable network but imagine the horror if that network is Syfy.

Terra Nova Review