Okay, I know last week I said this episode looked like it was going to suck. I'm happy to admit I was totally wrong. Usually when there's one of these conspiracy theory/paranormal phenomena episodes, Castle is decisively proven wrong at the end. I love that they left the door open just enough with Doyle vanishing and Beckett spilling the coffee on the letter. Really cool episode, and the guy who played Doyle gave an awesome performance. This is one I might watch again while it's available On Demand.