Clarrisani said:
If you want to play with the idea of CSIs making mistakes, you'd have to look at Catherine. She's made a great many mistakes over the years. I can think of many off the top of my head, from telling the husband who his wife was having an affair with in "Pledging Mr. Johnson", right through to Keppler and the reverse forensics in "Redrum". She's made more mistakes than anyone else on the team, including Greg.
I recall listening to audio commentaries that the writers liked putting Greg and Sara together for the soul reason that the two have great 'chemistry', which I will agree with. Greg and Sara have always worked well together, and seem to have an understanding.
However, the same is of Nick and Greg. In terms of on screen chemisty, these two have the strongest. They have always had an electricity to their scenes that just makes you sit up and take notice because you know it's going to be good. That was one of the greatest things about seasons 1-3: the Nick and Greg interaction.
It died off in season 4, and has been non-existant since. Primarily because we hardly see Greg anymore, but also because we have been seeing an unbalance in regards to allocating of cases and screentime given to the individual characters (Warrick is another casualty of this).
Another thing worth noting is Greg should be coming up on his test for CSI 2 very soon, and Nick is third in charge behind Grissom and Catherine. It's just odd that these two have never been assigned to work together. It bugs me.