A Chill Goes Through Her Veins
Season 1, Episode 5
Beckett: This is for the life I saved [pointing at the watch on her left arm which belongs to her father]. And. This is for the life I lost [picking at her necklace which belongs to her dead mother].
Beckett: I guess your Nikki Heat has a back story now, Castle.
Castle: I don't know. I did kinda liked the hooker by day, cop by night thing. But, I guess a heavy emotional angle could work too.
Beckett: Well, don't bewilder your audience with substance on my account, Castle.
Castle: Alright, so you and I are married.
Beckett: We are not married!
Castle: Relax, it's just pretend.
Beckett: I don't wanna pretend.
Castle: Scared you'll like it?
Beckett: Okay, if we're married, I want a divorce.
Apartment Guy: Are you two like this all the time?
Castle & Beckett: Yes.
(after Alexis helps him figure out a problem with the case)
Castle: It's family moments like these I will never forget.
Alexis: With a good therapist, hopefully I will!
[parked outside the home of a grandfather who killed his daughter's murderer]
Castle: You could just leave it like this. Sam's dead. The captain's happy. Those kids look pretty happy.
Beckett: That's the difference between a novel and the real world, Castle. A cop doesn't get to decide how the story ends.