As most of the episode takes place at the Black and White Ball, the transcript is only indicative of things that pertain to Nikolas and Emily.
Jason's voice: Some things are too important to lie about.
Thunder.
Nikolas: I told you my worst fear is hurting you. That's why I want you to lock me in here, okay?
Emily: No. Nikolas, that -- that's --
Nikolas: What? Crazy?
Emily: No, I'm not going to do it. Listen, there's got to be a better way.
Nikolas: Listen to me -- if I ever hurt you, I couldn't live with myself. Okay, all you have to do is just leave me in here until this is over, that's all.
Emily: No, I can’t.
Nikolas: Yes, you can, yes, you can, yes, you can. Okay? You can. As soon as you turn this key -- here -- I want you to go back to the north parlor with the rest of the guests, okay? No, it's okay. It's okay.
Emily: No, Nikolas, please, don't make me do this.
Nikolas: Emily, this is the only way. I have to protect you. Please don't take that away from me.
Emily: Okay.
Nikolas: Please.
Emily: I love you.
Nikolas: I love you, too. It'll be okay. I love you, too. All right, go on.
Emily: All right.
Emily: Oh, God.
Key turns in lock.
Nikolas: Emily? It's okay. You did the right thing, okay?
Emily: Okay.
Nikolas: Emily? What -- what was that? Are you out there? Emily, answer me!
Emily: It was just the wind, Nikolas, I'm fine. Um -- I'm going to go to the north parlor to be with the other guests, okay?
Nikolas: Emily, wait, wait. I don't think this was such a good idea. I need to be out there with you. Okay? Ple-- Emily.
Emily: Nikolas, I'm fine. Okay, I'm going to be all right.
Nikolas: No, no. I can't leave you alone. I can't protect you from in here. You need to let me out. Please. Please, you can trust me. Just let me out.
Nikolas: Emily, please. Please, you can't leave me in here. Please. You say you love me, well, you show me, please. Just let me protect you, okay? Please let me out of here.
Nikolas pounds on door.
Nikolas: Emily, please. You let me out of here right now! You let me out of here! Get me out of here! Please!
Nikolas crashes into door.
Scott: He's having a heart attack.
Emily: All right. How long has he been like this?
Logan: I don't know -- I found him maybe 10 minutes ago.
Emily: Okay. Sit him down right there.
Logan: Bring him around, put him on the couch.
Tracy: What happened? Is he drunk?
Scott: Set him down, set him down.
Emily: All right. He could be having a heart attack. I need you to go to the bathroom.
Tracy: Oh. Luke, are you all right? Oh. Emily, do something.
Emily: I'm going to try to stabilize him until we can get him to a hospital.
Tracy: We need to get a helicopter.
Scott: Nobody's flying in this weather, Tracy.
Tracy: We got to do something.
Scott: I know.
Emily: All right, do you have Edward’s heart medication on you?
Tracy: What? Do -- yes, I do. I do, it's in my purse. I brought it when I thought Daddy was coming with us.
Emily: Okay, where is it? Where's your purse?
Tracy: I don't know. I have no idea. I fell down the stairs, they brought me in here. I don't know if it came with me. Did they -- did you see --
Emily: Okay, stop. Tracy, deep breath, okay? Retrace your steps.
Tracy: Um -- it's in the entryway. It's a black velvet clutch --
Scott: All right, I'll find it.
Logan: I can't believe there's not any aspirin in there. There's just acetaminophen.
Emily: Okay, uh -- I need you to go get me a portable defibrillator, okay?
Logan: All right.
Emily: You're going to go back to the main staircase --
Logan: Yeah.
Emily: Cross the landing --
Tracy: Want to talk to me?
Emily: There's one in there.
Luke: Spanky? Spanky? Spanky?
Emily: Luke, you just had a heart attack, okay? You lie still, don't talk.
Tracy: Okay, all right. Don't talk, don't talk. I'm sorry I made you talk. Don't talk because if you make me a widow, I'll never forgive you.
Luke: This isn't happening.
Emily: I hate to be harsh with you here, Luke, but someone who heaps abuse on his body his whole life can't be surprised when his body hits back.
Tracy: She's right, you know. Some people treat their bodies like a temple. You treat yours like the town dump.
Luke: I'm glad you're having fun.
Emily: Listen, you just had a heart attack, okay? If you try to move, you could have another one. I'm not going to let that happen, so you just lie still or I'm going to have to tie you down.
Scott: Well, now there's an offer you don't get every day. Too bad you can't do anything about it.
Luke: Go to hell.
Emily: One more word to upset Luke and I'm going to throw you out of here myself, and I don't care if Anthony Zacchara uses you for target practice.
Tracy: Did you get the purse?
Scott: Yeah, here it is. I saved your life, Spencer.
Emily: Okay, I need you to go and help Logan get the portable defibrillator back here.
Tracy: Go back to the main staircase, cross the landing -- it's the first door on the right. Move!
Scott: Hey.
Tracy: Nitro pills.
Emily: Okay.
Luke: Ahem.
Emily: Put one right under his tongue.
Tracy: Lift your tongue up. I'll be damned if I let you make me a widow.
Scott: All right, Tracy, we got it.
Emily: Yeah, all right. Put it right there.
Logan: You're not going to shock him?
Emily: No, his heart appears to be back to a normal rhythm.
Scott: Normal? You mean, I just risked my life for nothing?
Emily: If he has another heart attack, then he's going to need this.
Tracy: And we're not going to give him another heart attack, are we? Get out and take this one with you.
Luke: Sorry about this.
Tracy: Sweetheart, you just hold on till we can get you some help.
Emily: Listen, Tracy, just keep him calm, okay, and don't let him put any more strain on his heart. All right?
Tracy: Why, are you leaving?
Emily: Yeah, there's something I got to do.
Tracy: What's more important than a man's life?
Emily: I'll be right back.