The knocking gets more frantic as Castle walks over to the door. He can't imagine why someone would be knocking like a crazy person at this hour. As he opens the door Beckett pushes her way past. "Beckett? What are you doing? Is everything okay?" He is seriously concerned. There seems to be a frenzied l look in her eyes.

Beckett starts to pace around the apartment. "Castle, I need you to do me a favor."

"Always, Kate. What's going on. Why didn't you just call?" taking her by the arm he leads her to the couch.

"I needed to see you face to face."

"Okay, take a deep breath and tell me what's happened. Is it your dad?"

"No, no dad's fine. I just… just… I was watching Princess Bride tonight…"

"Oh, I love that movie. Fesik are there rocks ahead…."

"Castle!"

"Sorry."

Beckett takes another deep breath and starts again. "I was watching Princess Bride and I was at the part where she finally figures out that Wesley loves her because he says, '"as you wish." Beckett pauses buying herself some time to decide if she really wants this answer.

"Okay, so what about it?" Castle, somewhat confused why this would be such an emergency at 3 o'clock in the morning patiently waits.

"Castle, when ever I thank you for something, you tell me "always"…would you mind getting me a drink of water?"

Castle goes into the kitchen and grabs a bottle of water from the fridge and brings it back to her on the couch.

"Thanks"

"Always"

"Kiss me?"

"Always, or would you prefer, as you wish?"