This episode really showed you how much Psych has evolved: Shawn was the more normal one tonight. It is not a blip though, it's a trend because Gus used to be the more balanced one, but lately he has been as goofy as Shawn on a weekly basis and to me that is poor writing bya show, opting for lame jokes rather than creating humor through conflicting personalities.
The episode just did not do it for me. They've done a lot of plots like this, and more often than not they have done it better than this. Predictable outcome, and unusually unamusing tonight.