Hello Castle Fanfic writers.

I have a challenge that I want you guys to try. I don't know the formal way of asking this but I would like to see someone try it. It has to do with The Lives of Others AKA 100th episode.

Castle said that that was the greatest birthday gift ever, but what if he didn't recover that way and kept on his initial train of thought? What if he reacted in a more negative way? Not to being fooled, but to seeing Beckett die (supposedly) only to find out it was a prank?

Thank you very much.