Intimate Lotion Application: When Castle thinks he and Beckett are going to Cuba, he jokes he'd be happy to rub lotion on her, bragging that he has "soft hands". She declines the idea.
Castle: Cuba! Good idea! I'll bring the mojitos, you get the beach towels. Beckett: Oh, I don't know, Castle. Me in a swimsuit under the hot, blistering sun... Castle: I'd be happy to rub lotion on you. Beckett: That's okay. [suddenly serious] I was actually thinking of something a little bit more local. Like the man who arranged the entire trip to Cuba. Bobby Fox, his agent. Castle: That's a good idea. [Beat] Castle: But the lotion offer still stands. Beckett:[walking away] No, thank you. Castle: I have very soft hands!
Mistaken for Cheating: The victim's wife eventually learns it's not a girlfriend in Cuba he got killed over... it's his daughter. It's also established that the victim's wife was at one point mistaken for cheating by the victim, when in fact she was upset over his 'cheating'.
Serious Business: Esposito starts to make fun of Castle for being the son of a famously single mother. Castle shuts him down, hard, and Esposito respects that.
