When we see the fingernails in the ice they are the same colour as the on the hands of the doll (pink, yellow, purple, orange and green) but when Dexter is looking at them more closely later on one of the nails is blue.
When Deb knocks on Dexter's door in the beginning of the episode, Dexter opens the drapes to look outside. There, you can clearly see a light from the set.
As Dexter and Angel are comparing the DNA samples from the piece of flesh in Ricky Simmons' mouth and the drop of blood from the kitchen of the Simmons house, the computer screen shows the source of the samples to be "Jimmy Sanders" and "Residence: Jimmy Sanders".
During Dexter's flashback scene in which he talks with his father about what happens when a cop is killed, there is a shot in which Dexter's father's mouth on the upper left corner of the screen moves twice without any sound coming from it.
When Deb is asked to see Lt. LaGuerta and Captain Matthews, she is talking to Dexter in uniform and on her left shoulder is her radio. It is there when she hugs the Captain after being re-assigned and then it is gone as she stands ready to leave the room.
Sgt. Doakes takes down Norberto's photo from the chart. When Lt. LaGuerta later comes to speak with him, not only has the photo reappeared, but he's seen taking down another photo. In the close-up it's the photo on the right in the middle but in the long shot it's the photo on the bottom right.
Dexter: (Voice over) Unlike the other guys down at the station I love coming to court to rub shoulders with the good people of the sunshine state...and Sasquatch.
Dexter: (voice over as Rita begins kissing his ear) Every time a woman tries to do this to me, it... tickles. Still, it's not entirely unpleasant.
Angel: (staring at Dexter's intricate blood spatter mock-up using red string) You must've been a motherfucker at Cat's Cradle.
Dexter: I never played it.
Dexter: (voice over) The worst thing about finally putting together a puzzle is finding there are missing pieces.
Chambers: All right. Okay, okay, it--it was me, only it wasn't me, it was the booze. It takes me over.
Dexter: That's a point of view to which I'm not entirely unsympathetic. Neither you nor I is in complete control of our destinies. Although, at the moment, it would seem I have the upper hand.
Chambers: I'm sorry. Really, I'm so sorry.
Dexter: You've done this too many times to be sorry.
Deb: Why the different nail polishes? What the hell is this guy thinking?
Dexter: (Voice over) He's thinking "Tag Dexter you're it."
Dexter: (Voice over about Chambers) Sure hope he doesn't go out there and kill himself, that would be tragic.
Dexter: (Voice over) Not Guilty. Matt Chambers may have found a way to beat the system, but so have I.
Lt. LaGuerta: Why go to all this trouble? What's this sick son of a bitch trying to tell us?
Dexter: (voice over) Not us. Me. My freezer, the painted doll's fingernails. I think he's trying to impress me. And it's working.
Vince: Vince Masuka only swings one way.
Deb: Yeah, from vine to vine.
Rita: Pick a date.
Dexter: I pick you. (voice over) And I pick my sister to chaperon.
Dexter: (voice over) Lately, the thing that surprises me most about Rita is how much I like being with her. But whenever that happens with a woman, when I feel comfortable with her, it all goes wrong.
Rita: I want some alone time with Dexter.
Astor: Are you gonna kiss him?
Rita: Actually, yes.
Dexter: (voice over) Our boss, Lt. LaGuerta. In keeping with her total sense of entitlement, she has this attraction to me, and I thought I was creepy.
Lawyer: And how long have you been doing blood spatter analysis, Mr. Morgan?
Dexter: Almost twelve years.
Lawyer: You've been involved in quite a few cases then?
Lawyer: Give or take.
Dexter: No. 2,103.
Lawyer: Then it's safe to say blood is your life.
Dexter: Safe to say.
Dexter: (voice over) Another beautiful Miami day, mutilated corpses with a chance of afternoon showers.
Angel: (in reference to Sgt. Doakes) What crawled up his ass?
Deb: He hates lab rats.
Angel: Well here's a headline, it's lab rats that make us cops look good.
Dexter: (voice over) I see their pain, on some level I even understand their pain, I just can't feel their pain.
Deb: (after discussing a case with Dexter) Why is it we never talk brother/sister stuff?
Dexter: Our dad was a cop, you're a cop, I work for the cops, for us this is brother/sister stuff.
Dexter: (Voice over) Look at them, they can laugh and play, it comes so easily for them. Even though I'm not one of them, even though sometimes I can really be a monster. Today, I'm just a sea monster.
Dexter: (voice over) I dream, I dream I'm floating on the surface of my own life, watching it unfold, observing it, I'm the outsider looking in.
Dexter: Seems like a nice guy.
Rita: They could barely keep their hands of each other.
Dexter: (Voice Over) I can kill a man, dismember his body, and be home in time for Letterman, but knowing what to say when my girlfriend's feeling insecure....I'm totally lost.
Dexter: (voice over) My sister puts up a front so the world won't see how vulnerable she is. Me, I put a front so the world won't see how vulnerable I'm not. I don't care who these fingertips belong to, only what my new friend out there is trying to say.
Dexter: (Voice over as he puts Matt's slide in the box) Matt Chambers, welcome to your last change of address. You'll like it here, you and your neighbors have so much in common.
Dexter: We have an elephant in the room, and its name is sex.
Rita: Tell me about it.
Dexter: As far as I'm concerned, it can just stay in the corner and mind its own damn business.
Rita: It's easier said than done.
Dexter: Yeah, but it needs to be right. For both of us, or it won't be right for either of us. I don't want that, do you?
Rita: No. You know, I can't believe I found the one good truly decent man left on the planet.
Dexter: (voice over) He came back and left nothing behind but a message. "Come find me", and I will. There are no secrets in life. Just hidden truths that lie beneath the surface.
Dexter: (voice over) If God is in the details, and if I believed in God, then he's in this room with me. I just wish he'd brought an extension cord.
Dexter: (voice over) Ice truck killer returns, dead undercover cop, it's a typical day in the neighborhood.
This episode was nominated for the 2007 Edgar Award for Best Television Episode Teleplay.
The main theme for the episodes is written by Rolfe Kent.
Rita: You're snarfing them down like the Cookie Monster.
The Cookie Monster on Sesame Street is a furry blue monster with googly eyes that likes to eat cookies. Since 2006, the Cookie Monster has undertaken a healthier diet and tells kids that cookies are a "sometime food." Although Jim Henson first created the character in 1966 for a General Foods commercial, the Cookie Monster didn't appear on television until 1969 and was originally voiced by Frank Oz.