Who Are You? - S1-E6
Deliberate mistake: A plumber is looking for a leak under the floor of a house, and sees the bones of a hand sticking out of the concrete wall at the side of the house. The concrete is flat, this is because in construction boards are put up and the concrete is poured in, so how were the fingers sticking out of the boards during construction? In reality, the fingers would be inside the concrete, the workman would see nothing, no plot for CSI.
[To a room full of dead corpses, after Holly Gribbs was frightended into hysterics.]
Gil Grissom: You assholes!
Abra Cadaver - S3-E5
Trivia: This episode featured a guest appearance by Tom Noonan. Noonan and series star William Petersen played villain and hero, respectively, in the film "Manhunter."
Question: Why would Catherine take the blame for the lab explosion? If anyone was to blame it was Hodges. Since he accidentally turned on the hot plate and even admits that sometimes it gets switched on by others accidentally, if he had bothered to make sure he didn't switch it on before leaving the room, the explosion never would have happened.