When Grissom is comparing the two pieces of the clock mechanism, we first see it through a lens - we can see that he's holding both parts in his fingers. However, when the camera moves out and switches views, he's holding the right (viewer left) piece via forceps.
The FBI (Federal Bureau of Investigation) and ATF (Bureau of Alcohol, Tobacco, Firearms and Explosives) would actually be called in to investigate the bombing, and not local Police.
When the article on Dominic is being pinned up, the word 'sacrificed' is spelled correct the first time, but after that it is spelled incorrect, 'sacraficed', every other time in the article.
On the obituary for Dominic, the word 'sacrificed' is incorrectly spelled 'sacraficed'.
When the dead prostitute's body is revealed for Nick Stokes to identify, the woman is clearly alive.
Grissom tears Dominic's obituary from the newspaper. When he places it on the bulletin board, it was clearly cut out with scissors.
In the final scene where they post the newspaper article, the first paragraph is simply copied over and over. It can be seen as the camera zooms in on the picture.
The obituary of Dominic that Grissom places on the wall with other fallen heroes is the same paragraph typed up three times.
When Greg is in the lab with Catherine looking at the semen sample under the microscope, Greg says the line "Nick's little soldiers. It's all you," but his lips don't move.
Catherine enters the morgue to see the body of Nick's dead prostitute friend. After Doc Robbins says, "Can I help you, Catherine?" she responds, "I just wanna see the body, David." On CSI, Doc Robbins' first name is Al. However, the actor who portrays Doc Robbins, Robert David Hall, has been known to go by his middle name, David. Doc Robbins does have a helping hand in the morgue, David Phillips, however he is obviously not in the scene.