[After Beckett discovers that Castle placed a bet with Esposito and Ryan over who would solve their murder first]
Castle: Listen, I'm sorry. I know it was wrong, I just-
Roselyn: Beckett, you are never gonna believe this.
Beckett: Oh, the bar on "unbelievable" is pretty high right now.
Roselyn: The vic's husband took out a three-million dollar life insurance policy on his wife last month.
Beckett: [to Castle] $100 on us.
Castle: Listen, I'm sorry. I know it was wrong, I just-
Roselyn: Beckett, you are never gonna believe this.
Beckett: Oh, the bar on "unbelievable" is pretty high right now.
Roselyn: The vic's husband took out a three-million dollar life insurance policy on his wife last month.
Beckett: [to Castle] $100 on us.
[After Beckett discovers that Castle placed a bet with Esposito and Ryan over who would solve their murder first]
Castle : Listen, I'm sorry. I know it was wrong, I just-
Roselyn : Beckett, you are never gonna believe this.
Beckett : Oh, the bar on "unbelievable" is pretty high right now.
Roselyn : The vic's husband took out a three-million dollar life insurance policy on his wife last month.
Beckett : [to Castle] $100 on us.
http://www.tv-quotes.com/shows/castle/quote_23831.html