The topic is good. The characters/production is taking the show off the tracks.
Fishburne's character is taking too much of a leading role.. his character should be secondary to the more senior CSI's rather than having become this sudden genius know-it-all and lead. Very unnatural progression.
And please, get rid of Sackhoff. She just does not fit and is really just creepy to watch. Between the mechanical acting, that creepy grin and awful hair, she looks like a cylon starbuck tossed into a crime drama. Painful to watch.
The story is great; natural gas exploration via the use of shale fracturing, which does indeed poison water tables. It is a current social issue and addressing it in the episode was a good idea. The ending was a bit weak - its not clear if there will be follow-on episodes covering the continued investigation of the hit and run to lead to an indictment against the drilling company or its persons; if there isn't it would be a very unsatisfying episode.