First, he’s a dude named Mary.
Second, he gets stabbed to death.
In Season 4, Episode 16 – “Mr. Yin Presents” — Shawn, Gus, and the gang go after Mr. Yang’s accomplice.
And for a little while, they think Mary may be their man.
While searching Mary’s house, Shawn finds his diary, complete with all kinds of crazy, creepy writing. The diary — a black Moleskine notebook — is one of the most important props in the entire episode.
This is the screen-used diary, a one-of-a-kind item direct from the Psych set.
It’s a first-rate piece of memorabilia and a must-have for any serious fan of Psych.