I recently watched a rerun of what is probably my favorite Psych episode, Mr. Yin Presents. It's an uber-cool homage to Alfred Hitchcock films and a great little mystery, all in one wonderfully fun and inventive hour of viewing pleasure. And it got me to musing: "Hmm, if Castle did an Alfred Hitchcock homage, what would it look like?"  My pick for the best use of Nathan & Stana in such an event would be recreating the romantic, sexy, intriguing film, Notorious. It's not one of Cary's funniest films, but WOW, what a performance!