"Elsewhere", the song that Haley sings to Nathan in the cafe, was originally performed by Sarah McLachlan and is from her Fumbling Towards Ecstacy album.

Peyton: (voice message to Lucas) Hey it’s me, Peyton. Where are you? I really want to see you. Give me a call.

Brooke: Hey I want you to know I’m here for you. Whatever you need. And if she’s not home, I might even give you a sponge bath.
Lucas: Actually I can’t do that for a while.
Brooke: What? Bathe?
Lucas: No. You know. Sex.
Brooke: Oh. That sucks. A little cardio might just be what you need though.

Brooke: Peyton? I looked all over for you. You didn’t get my messages?
Peyton: Really? Oh no my phone’s been whacked out all day. Are you okay?
Brooke: (crying) Not really, no. I said I wasn’t going to do this and I said that it wasn’t worth it but it is. Lucas broke up with me.
Peyton: I’m sorry.
Brooke: (crying) I was looking forward to getting a chance to show him how much he means to me and he said he just wants to be friends. And every idiot knows that that’s just code for go away. I don’t know what I’m supposed to do.

Karen: Is something wrong?
Jake: Well my dad just got called into work so there’s no one to watch Jenny.
Karen: Is that your sister?
Jake: That’s my daughter. Lucas didn’t tell you?

Karen: Well I should go check on Lucas.
Brooke: Will you let me?
Karen: Yeah.
Brooke: (in Lucas’ room) Lucas? (the phone rings)
Karen: Hello? Peyton. What?! Can you get him to the emergency room I’ll meet you there. Brooke. It’s Lucas. I got to go.
Brooke: Yeah I’m coming with you.

Brooke: Lucky thing you finding Lucas like that. If you didn’t come along, who knows what might have happened.
Peyton: Everything turned out okay.
Brooke: No, not really. I don’t know what hurts worse, you and Lucas sneaking around behind my back or you lying about it to my face.
Peyton: Brooke.
Brooke: No. The next time you want to steal my boyfriend, you might want to turn that thing off. (Looks to the web cam) I went into his room to check on him and his computer was on. I know you two were together. He meant everything to me, Peyton. And I was ready to try and be his friend if that’s what he needed. And now I don’t really care if I see either one of you again.
(Brooke leaves; Peyton looks at the web cam; Lucas is watching her on his screen)

Nathan: Is this a new outfit?
Haley: He noticed! Yes, it is. It’s all part of the new me.

Lucas: I’m just going to need some time to figure some stuff out.
Brooke: Whatever you need, I’m here for you.
Lucas: Yeah see that’s the thing.
Brooke: Are you breaking up with me?
Lucas: I just think it’s the best thing for right now.
Brooke: Maybe for you.
Lucas: Brooke, I’m sorry.
Brooke: Apparently not enough.

When Lucas is arguing with Karen after coming back from the hospital the second time, his sling is on his left arm, not his right as it had been in previous scenes.

Episode Title: Suddenly Everything Has Changed

"Suddenly Everything Has Changed" is a song by both The Postal Service and The Flaming Lips.

Haley playing for Nathan at the cafe foreshadows events to come in both Haley's life and her relationship with Nathan. In future episodes, Haley's musical talent propels her into the spotlight and lands her a once-in-a-lifetime opportunity to tour with a major band, but at the same time becomes the driving force behind the slow breakup of their marriage.