Castle: That day in the woods, Kate... That's why I do what I do. I'm driven to figure out the story because I could never figure out that one.
Beckett: Why didn't you ever tell me this before?
Castle: I think I didn't want it to be real. But it is real. He's real. He killed before, and he just tried to kill again.
Beckett: The moment that I met you, my life became extraordinary. You taught me to be my best self, to look forward to tomorrow's adventures. And when I was vulnerable, you were strong. I love you, Richard Castle. And I want to live my life in the warmth of your smile and the strength of your embrace. I promise you I will love you. I will be your friend and your partner in crime and in life, always.
Castle: The moment we met, my life became extraordinary. You taught me more about myself than I knew there was to learn. You are the joy in my heart. You're the last person I want to see every night when I close my eyes. I love you, Katherine Beckett. And the mystery of you is the one I want to spend the rest of my life exploring. I promise to love you, to be your friend, and your partner in crime and life, 'till death do us part, and for the time of our lives.
Esposito: How much trouble can he be?
Beckett: Trust me, once he finds out that he has to work this case without me, he's gonna get bored, and he's gonna move on.
Esposito: He found our victim's school without you.
Beckett: Yeah, but that was easy, he doesn't have access to financials, to phone records, to street cam footage, I mean how far is he gonna get?
Ryan: You know what would really suck? If Castle solved this case before we did.
Beckett: And that is not possible!
Ryan: Yeah, but what if he did?
Beckett: Then we'd never hear the end of it!
Esposito: Ah, nooooo, you would never hear the end of it. You're the one that has to go home to that guy.
Castle: Fine, I'll go! Eh, Montreal is a short flight, I'll be there and back in a
couple of hours.
Beckett: No! Not after everything we've been through, you're not going alone!
Alexis: She's right, and you can't go by yourself. I'll go with you!
Castle: Yes...yes...she'll go with me!
Beckett: We have no idea what's out there. No idea who's out there, that's too risky.
Castle: It's Canada, how risky could it be? And need I remind you I'm a grown man, I don't need to ask your permission, that being said, please! please! please can I, can I go?
Beckett: OK, fine, but only because I know you're not going to do anything stupid if she's with you. [To Alexis.] Don't let him do anything stupid.