According to the firearms document, Locke's full name is Johnathan Locke (no middle name), he's 5' 10", weighs 175lbs and was born on 15th November, 1946.

Kiele Sanchez (Nikki) and Rodrigo Santoro (Paulo) make their first appearance despite being credited from the beginning of season 3.

For as yet unknown reasons, the scene in which Claire catches Nikki and Paulo in Jack's tent was cut from the episode.

Charlie: (to Locke) So, you're gone a whole day after a massive hatch detonation. You don't call, you don't write...

Charlie: (to Locke) What? You... you can't speak, John? You're mute? I am sorry about that. So, where are Eko and Desmond? Are they off being mute and building structures as well?

Charlie: (to Locke) The sand? You need to speak to sand? Trees? Yeah, I've heard they're wonderful conversationalists.

Charlie: (to Locke) You need to speak... to the island?

Charlie: (to Locke) "I need you to stand guard." Oh, yeah, so you can talk to the island? Dangerous. Well, amusing as the mute game invariably is, you are aware, John that I detest you, aren't you? You do remember repeatedly punching me in the face and accusing me of using heroin when I was not.

Charlie: (about Locke's sweat lodge) Oh, I like the indoor fireplace. It's very snazzy.

Charlie: (after seeing Locke make his 'wacky paste') You're not... taking drugs, are you, John? I only ask because of the strict zero tolerance policy you've enacted. I wouldn't want you to have to start punching yourself in the face. (Locke holds up his notepad telling Charlie to stand guard) Yeah, I know, I get it. You're gonna go in your little magic hut and I'm gonna stand out here in case you devolve into a monkey.

Boone: (to Locke) Don't worry. You'll speak when you have something worth saying. I'm here to help you find your way again... so you can bring the family back together.

Charlie: (as Locke unsheathes his knife) What you doing?
Locke: I'm going to save Mr. Eko's life.

Locke: He was dragged this way.
Charlie: Dragged? By what?
Locke: By the polar bear.
Charlie: Sawyer killed the polar bear.
Locke: He killed a polar bear.

Locke: I'm gonna go on alone, Charlie. You go back to Claire.
Charlie: Well, I'll take my chances.
Locke: You don't wanna go with me, Charlie. Bad things happen to people who hang around with me.

Locke: Go on in there and figure out if you're a-a farmer or a hunter.
Eddie: So, which are you, John?

Locke: You're not going in there, Charlie.
Charlie: What?
Locke: I'm gonna do this alone.
Charlie: You don't get to tell me what I can't do, if I wanna go in there, I'll go in there!

Charlie: You don't have a good reason to go in there, either!
Locke: I'm going in there because I'm supposed to go in there.

Charlie: Hairspray?! Now, I hate to be the one to point this out to you but...
Locke: (smiling) It's not for me.

Hurley: (as he hears some rustling in the jungle) Bear? Is... that... you? Who's there?!
Desmond: Are you alone, brother?
Hurley: Uhh, yeah. (Desmond stands up completely naked) Whoa, dude! I'm not alone!

Desmond: Can you give me some clothes?
Hurley: What happened to yours?
Desmond: I woke up in the jungle like this.
Hurley: So... like, the hatch... blew off your underwear?

Hurley: (after Desmond tells him he was unconscious during the failsafe incident) Oh, FYI... the whole island vibrated. And Kate and Jack and Sawyer saw it too right before they had bags pulled over their heads!
Desmond: Don't worry. Locke's gonna go after them. He said so in his speech.
Hurley: What? What speech?

Eddie: You're not a murderer. You're a good man. You're a farmer.
Locke: Nope. I'm not a farmer. I was a hunter. I'm a hunter.

Locke: I messed up. Now our people are captured and... if I'd just listened to you... if I'd just let you... keep pushing the button... I could've gone with 'em. Protected them. I could've saved them.
Eko: You can still protect them. You can still save them.
Locke: I-I don't even know where they are.
Eko: You will find them. After all, you are a hunter, John.

Locke: I'm gonna find our friends. I don't know how yet but I will. We're gonna find them, all of them. And then we're gonna bring them home.

Charlie: Not a bad speech.
Hurley: Whoa.
Charlie: Whoa what?
Hurley: I just got hit with... you know... deja vu.

Charlie: You know, when I used to get high, I watched nature programmes on the Beeb. Polar bears are meant to be quite clever... very clever. They're like the... Einsteins of the bear community.

The Beeb is a nickname for the BBC (British Broadcasting Corporation).

Hurley: So, what did happen?
Desmond: Well, the fail-safe key must've detonated the electromagnetic anomaly. Made the hatch implode.
Hurley: You didn't implode.
Desmond: No.
Hurley: You're not gonna like... turn into the Hulk or something?

The Hulk is a Marvel Comics superhero. Having been caught in the blast of a gamma bomb, Dr. Bruce Banner transforms into the Hulk when he becomes angry.

Eddie is wearing a Geronimo Jackson shirt when Locke picks him up.

Geronimo Jackson is a fictional artist that featured in the episode The Hunting Party where Charlie and Hurley discover a Geronimo Jackson record in the hatch.

It seems there is much to learn about our friend Desmond.

First off, it seems that of all the people currently residing in the South, the PDI (Post-Dharma Initiative) knows absolutely nothing about Desmond---who he is, how he got there, or even that he's on the island at all; as referenced in The Glass Ballerina by the PDI about the surprise of the sailboat. If they didn't know how it got there, what does that say about their surveillance in the South for the three years previous to the crash of Oceanic 815?

Secondly, his "deja vu" moment tells us one of two things: that he has the ability to see into the future and has always been able to do so, or that this ability is newly acquired since the hatch implosion. Evidence points toward the former, as he didn't seem too keen to dwell on his "mistake" with Hurley, and he dismissed is very quickly...like he was trying to avoid the whole incident. Could this explain some of his actions before the boat crash?

Theme: "Home" and "Family"

In Locke's speech, he mentions that he will set out to find and rescue all of the missing Losties (namely Jack, Kate and Sawyer but also Sun, Jin and Sayid) and "bring them home." The concept of "home," first brought to light by Ben in The Glass Ballerina, now plays to the other way of viewing a "home": a place where someone belongs, regardless of where their relations are. Locke views the Island as his "home," as it is there that he feels he truly fits in and can make a life for himself that means something to him. In contrast, Ben seems to view "home" as the place where you come from originally, and has no capacity to understand the psychological aspects of the word.

"Family" is another issue touched on in this episode, as "Vision Boone" tells Locke that he needs to "bring the family back together." While to date no Lostie has ever voiced their belief that the Losties as a group are a sort of family, their actions certainly say otherwise. There are many examples of one or another of the group putting their own interests or lives in danger to help another Lostie. While most call each other "friends" (Jack and Locke both have done this, as well as Hurley in Live Together, Die Alone), it's apparent that the word means so much more.