Definitely not a top episode in my opinion. It had the cliched let's have everyone in the cast put on a new costume and pretend they are different people. In this case they are representing parts of Dr. Venture's mind. Why? Because the evil, fanatical Monarch had snuck into the Doctor's brain and now Dr. Orpheus has invaded the Doctor's brain to oust out the first invader. So Orpheus gets to meet Billy Quizboy as Eros, and other versions of the Doctor as his Id, Ego and Super Ego. It's as I said fairly cliched, but does give you a good idea how pathetically the Doctor's mind works.
Meanwhile, Mrs. Monarch is finding out she has a lot more in common with Henchman 21 than she thought. It doesn't hurt at all that for reasons of security she's dressed as a cheerleader. Also, Brock and Sgt. Hatred begin to seriously butt horns over who is in charge of watching over the Ventures. You know you are on the bottom of somebody's list when you just get one skittle.
Overall, there's just too much going on this episode. That is why really the best thing is actually a very quiet bit at the end. After the credits, they come back and the Doctor has a long monologue about his life. It really gives context and a bit of sympathy over why he's such a pathetic bastard. One thing the creators of the Venture Brothers truly understand is how close comedy and tragedy can be.