Writer:	Sarah Goldfinger
Director:	Jean de Segonzac
Star:	William Petersen (Gil Grissom),  Robert David Hall (Dr. Al Robbins (episode 47+, recurring previously)),  Paul Guilfoyle (Captain Jim Brass),  Marg Helgenberger (Catherine Willows),  Louise Lombard (Sofia Curtis (episode 142+, recurring previously)),  Jorja Fox (Sara Sidle (episode 2+)),  George Eads (Nick Stokes),  Gary Dourdan (Warrick Brown),  Eric Szmanda (Greg Sanders (episode 47+, recurring previously))
Recurring Role:	Liz Vassey (Wendy Simms),  Wallace Langham (David Hodges),  Archie Kao (Archie Johnson),  David Berman (David Phillips)
Guest Star:	Sheeri Rappaport (Mandy Webster),  Joanna Going (Amanda Sinclair),  Maxwell Huckabee (Henry Sinclair),  Valerie Mahaffey (Dora Pomerantz),  Saige Thompson (Tiffany Hughes),  Sarai Givaty (Natal Peled),  Harry Van Gorkum (Jake Lenoir),  Joanna Going (Jill Case),  J.C. MacKenzie (Dr. Gus Hoffman),  Kelly Smith (Allison Shram),  Frank Grillo (Gary Sinclair)

Featured Music:
Two Of A Kind by Bobby Darin & Johnny Mercer
Mandy by Barry Manilow
When Nick Sings.
Word Up by Willis (edit) CSI rating beat Grey's two weeks in a row. This episode had highest ratings for this season. Read here- http://www.tv.com/tracking/viewer.html?tid=98386&ref_id=19&ref_type=101 (edit) Hodges refers to the victim's car as having been damaged by "the sabra's key". "Sabra" is a term used to describe a native-born Israeli (Natal, in this case); it literally means "prickly pear". (edit) In this episode, Nick (George Eads) sings Barry Manilow's Mandy to Mandy Webster (Sheeri Rappaport) to get some lab results. (edit)

Doctor: She's the kind of girl we like to call a bed pan.
Nick: A bed pan?
Doctor: Yeah, full of crap and best when dumped. (edit) Wendy: I have bad news and weird news. Which would you like to hear first?
Catherine: Bad.
Wendy: Bad news, I got nothin' from the blue stocking that was found in trash. Weird news, I tested the red lipstick that was found on the Gary Sinclair's collar, and I got DNA but it wasn't his wife's.
Catherine: Well, based on the contents of her purse she's more of the lip balm type.
Wendy: Well, you know I like to be through. I ran it through COTIS and I actually got a hit, Natal Peled. She's in the system for a rape charge in L.A.
Catherine: They don't put victim's DNA in the database.
Wendy (smirks): No, they don't. (Catherine looks intrigued) Yeah, I had to know so I called a friend of mine from the L.A Sheriff's department. And apparently Natal was a nurse from a Hollywood hospital and she went to the annual Christmas party she fed this doctor a buncha cocktails, (Catherine looks shocked and starts to smile) slipped him a provalice and then took him to a hotel room. Rumor has it was to have unprotected, (smiles) you know, baby-makin' sex. He pressed charges, she was arrested and then they settled out of court. And now Natal's a nurse at our very own Desert Palm.
Catherine: With Amanda's husband---Dr. Gary Sinclair. (edit) Catherine: Our two cases have become one.
Grissom: Could still be two cases.
Catherine (smirks): Whatever happened to Mr. No-Such-Thing-As-Coincidence? "The simplest hypothesis is usually the correct one." "If you hear hooves think horses, not zebras."
Grissom: What would the horses be in this case?
Catherine: Murder/suicide. Jill killed Amanda, and then felt guilty and killed herself.
Grissom: And what've you got to support that?
Catherine: Did you notice any photos of Amanda or Amanda's family at Jill's house?
Grissom: No.
Catherine: Right. And I looked through Amanda's phone book and Jill was not even in it.
Grissom: Well, maybe she her number memorized.
Catherine: Brass spoke to Jill's attorney for next of kin--non-existant. She leaving a small fortune to various charities. Sounds to me like estrangement. (Grissom makes a face) Okay, even if that wasn't the exact way that it went down I'll bet you a dollar that the twins deaths are related.
Grissom: Two women found dead on opposite sides of town, if they didn't look alike would you still link them?
Catherine: If they're relatives, yes. Sisters, husband and wife, father and son.
Grissom: Okay.
Catherine: Okay, what?
Grissom: I'll take the bet. (edit) Warrick: Boy, she hung out with some big wigs.
Grissom: She was a big wig. Jill Case editor and chief of the Las Vegas Globe, she was a wonder kid. One of the youngest women in history to run a newspaper.
Brass: Well, I've been all around the house, no sign of a forced entry.
Grissom: Consistent with suicide.
Warrick (looking at suicide note): So is this. You can't even use a whole sheet of paper for your suicide note?
Grissom: Well, I don't know. If you feel like you don't deserve to take up space on the planet, you don't deserve a whole piece of paper. (edit) Catherine: Well, I got a phone, and keys but no purse.
Nick: Mugging?
Catherine: Take the purse but leave the Lexus?
Nick: Yeah, that's not real savvy, is it? (edit)

When Curtis and Stokes go to visit Mrs. Palmerand at the horse farm to ask her about her twins, she leads the horse to the post to tie it to while she talks to the CSI's. She takes the horse lead and drapes it around the post a few times, which a true horse handler would never do. They would tie a simple slip knot to ensure that the rope won't fall away to easily letting the horse roam free. (edit) When Catherine is talking to Grissom she says:

Catherine (smirks): Whatever happened to Mr. No-Such-Thing-As-Coincidence? "The simplest hypothesis is usually the correct one." "If you hear hooves think horses, not zebras."

Grissom said this same line in Season 6 episode Pirates of the Third Reich:
Grissom: Occam's Razor, principle of parsimony. If you hear hoof beats think horses, not zebras. (edit) The word that Grissom missed on the crossword was "misanthrope" meaning "distruster of the human race." Hmm, who do we know that sounds like this? (edit) In the beginning of the episode, we see Grissom looking at a letter that mentions an entomology seminar, and it suggests that he take a sabbatical.

For a few episodes this season, William Petersen will be leaving the show in order to star in a play, and the on-air reason for Grissom's temporary leave is a sabbatical. (edit)

Grissom: She was a wunderkind.

From the German: Wunder = wonder/miracle & Kind = child, a child prodigy or someone who achieves overwhelming success very early in life. Wunderkinds have a greater tendency towards OCD due to their need to stay at the top of their field. (edit) One of the sisters is called Jill Case, and she has a half sister called Tiffany. This is an allusion to the James Bond film "Diamonds Are Forever", part of which is set in Las Vegas. The female lead is Tiffany Case, played by Jill St John . (edit) Dr. Hoffman: She was the 's' I was the 'm'.

This quote references the common S&M which is short for Sadism & Masochism. A sadist is someone derives pleasure, either emotional or sexual, from causing another human being or animal pain. A masochist is someone who derives pleasure, either emotional or sexual, from receiving pain. A sadist and a masochist are good together because one enjoys hurting the other, while the other enjoys being hurt by the other. (edit) Warrick: When we checked the flash drive I found in Jill's drawer, we found more than meets the eye.
Greg: It's a Transformer?

Transformers are toys that fold out from everyday objects such as an animal or a car or other vehicle into robots. In the story universe (developed by Marvel Comics) that goes with the advertising, the robots are intelligent entities, the good (Autobots) fighting the evil (Decepticons).

The toys were developed in Japan by Takara Co. in the early 1980s and sold under licence in the US by Hasbro starting in 1984. The two main advertising taglines for Transformers were Robots in Disguise and More than meets the eye. (edit)