Which seventh episode is your favorite?
"The Usual Suspects" is a classic for a reason--great cinematography, an interesting twist on the usual case structure, and some fun little character moments--and "Plush" is a nice late-season throwback, with some fabulously creepy visuals and no clear answers about culpability, but if we're using the metric of "how many times have you watched it", the far-and-away winner is "The Mentalists". It's just an all-around enjoyable episode, with a good balance of monster-of-the-week and interplay between the brothers, and one of the most memorable lines from the entire show: "You are a virile manifestation of the divine."