A great show with a great cast. The Las Vegas Crime Lab are the characters on this show, backed up here and there by the LVPD.
The third season ended with Gil Grissom (the main character) going in for ear surgery. He had been losing his hearing for some time, his mother had went deaf, and he would too if he didn't get this operation. On the first episode on this set, Grissom lets his co-worker Catherine know that her cell phone is vibrating. She says, "You can hear that? You're back."
Also on the first episode of this set, the character Nick Stokes tells a guy, who he knew long ago - who recognizes him now, about some specifics on the case they're working on. We find out that guy leaked the info to the press - which creates a problem between Grissom and Nick.
Another problem in the storylines is concerning the character Sara Sidel, who shows early on in this set, that she's mad at Grissom. Late in season three, she asked him out - and he said 'no'.
So aside from all the personal drama between the characters, the murder cases themselves are always interesting.
One of things that people love about this show (and its spin-offs) are 'The CSI Shot': an extreme close-up used in every episode. This close-up shot is used to help us (the viewer) see better what they (the investigators and coroners) are seeing. The camera zooms in on and through gunshot wounds; through blood streams; wounds to the back of the head; anything useful.
On the final episode of this box set, aside from a drunk driving accident involving one of the characters, the boss Gil Grissom promises to the lab tech character Greg that he will be put 'in the field', like the other CSI criminalists. This fact is true: as in season five (the newest season, airing this fall) a new lab tech enters the show, and Greg is given field work. Greg, due to his good sense of humor, has got to be my favorite character on the show.
So check out season four, and the others one too, if you haven't already. Don't let that $75-$80 pricetag on this set scare you, you won't be disappointed.
The first season of CSI: Miami is also on DVD, the second season will be out later this year, with the third season airing on TV. The Miami show I really didn't enjoy too much, I think because of the cast. Also this fall, CSI: New York starts its first season. Gary Sinice is the star of that one, who has studied up on forensic science in the past - for his villian character on the movie "Ransom"