Greg: It's feldspar and quartz. That's crushed gray sandstone. It's man-made, in a rock crusher.
Nick: What does that mean?
Grissom: It means she wasn't killed in Hawaii. Other than that, he has no idea.
Catherine: I'm a forensic scientist.
April Lewis: Scientist ... wow. You look so normal.
Nick: So can you tell me where the sand came from?
Greg: I might have to do some field research to find out. You think Grissom would let me go to Hawaii?
Greg: Maybe I saw you perform.
Catherine: Oh, I doubt it.
Catherine: You would have remembered.
Eddie Willows: Cath, when are we gonna talk about what happened between us?
Catherine: What's there to talk about? You cheated on me. I caught you. I've got a new life.
Sara: I hear it's just bones. What a rush.
Gil: (to skull) Who are you?
Gil: It's about the evidence, Catherine. You may not like where it takes you.
Gil: I know one thing, my guys will not bend, and they will not be intimidated!
Jim: (to Gil) This is your fault. Your nose is so far down a microscope, you got no idea what your people are doing.
(Under the crawlspace of the house, the plumber carries his flashlight and crawls, examining the pipes for the leak.)
Woman's Voice: What's taking so long? I just wanted you to fix the leak!
Plumber: (looks up) Look, lady, to fix the leak I need to find the leak.
(He continues to examine the pipes and crawls deeper under the house.)
(He crawls against the wall where his shirt catches on something, ripping the material. He stops.)
Plumber: Hold on.
(He grunts as he shifts around to look at the wall. He turns up his flashlight)
Woman's Voice: Did you find the leak?
(He brings his flashlight down and finds the bony tips of a skeleton embedded inside the foundation wall sticking out. He looks at it closely.)
Plumber: I found something.
Gil: Hold on, Nick.
Nick: (sighs) There's got to be an easier way.
Gil: When a body decomposes in concrete it leaves an air pocket, vacuum-sealed. We do this right, it'll open like a jar of pickles.
Catherine: So, what do you have for me? I could use a rush.
(Grissom sits at the edge of the table.)
Gil: Well, this qualifies: 4-26. But I can't give you the case.
Gil: Conflict of interest. The alleged rape victim is an exotic dancer.
Catherine: (offended) Because I used to be one, I'll be biased?
Gil: No. Suspect's your ex-husband. He's asking for you, but you can't take it.
(Catherine stands up and looks at Grissom.)
Catherine: Just let me do the prelim.
Gil: All right. (He gives her the assignment sheet.) Do what you can. But after the preliminary, you pass it off, okay?
Officer Joe Tyner: Then he turned the weapon on himself -- one shot -- right through the forehead.
Sara: Where's his gun?
Officer Joe Tyner: I left it in the jeep.
Sara: I'm going to go bag it.
(Sara heads for the jeep.)
Warrick: Officer, we're going to need your weapon, as well.
Officer Joe Tyner: I never fired.
Jim: Drawn but not fired.
Warrick: (shakes his head) It's just standard procedure.
(Officer Joe Tyner sighs.)
Jim: It's okay. It's okay.
(Officer Joe Tyner takes out his weapon and hands it to Warrick handle first.)
(Sara approaches the jeep and looks inside.)
Warrick: Were there any witnesses?
(She looks down at the body inside the front seat of the jeep. She takes the gun out of the Suspect's hand.)
Warrick: We're going to need to seal off this lot.
(Brass looks at Warrick.)
Jim: Tyner told you what happened here. Whose side are you on?
Warrick: The officer told me a fleeing suspect committed suicide. I'm just verifying his account. You know how this works, Brass. Can we clear the jeep so I can do my job?
Jim: Well, at least test the dead guy's hands for gun residue.
Title: Who Are You?
The title of the episode comes from the song Who Are You? by the band The Who, which is used as the series' theme song.
Amy Hendler: There was blood... everywhere. No one else could see it ... but I knew it was there. A dead body is so heavy.
Grissom: For five years, you've been washing the blood off your hands.
Two literary references in this. The first is to Edgar Allen Poe's Tell-Tale Heart while Grissom's line is a reference to Shakespeare's MacBeth, Act 5 Scene 1.
The head molding scene with Grissom and Teri Miller is similar to that of the movie Ghost when Patrick Swayze and Demi Moore mold the pottery.
Teri Miller: Gil Grissom? Or should I call you Spider-man?
This is a play on the comic book character Spiderman.