True movie buffs, such as I, appreciate the obvious allusion to Hitchcock's "Strangers On a Train", the plot, the actors, their characters. (I wrote a college paper on Hitchcock's movie "Rope")
We find out that Grissom is a movie buff, since he has been to this art house theater before and in the end goes there with Catherine. I never could tell if by "silent movies" he meant for Catherine to shut up or if he actually liked silent movies because of his hearing problem.
The other team works on a "ripped from the headlines" case. These kids obviously watch "Jackass" or that type of show and pay the consequences.
There is a funny exchange between Greg and Jackie the fingerprint tech. They bet who can get results faster and when Jackie loses, she has to wear a stupid hat. She then begs Grissom to let Greg out of the lab.