Edward: Katherine, this is my den and this is my mug, and it's going to stay out here on the desk where I can see it.
Kitty: Well, why don't we just tuck it right behind the lamp?
Edward: I have a Revolutionary War flintlock and I'm not afraid to use it.
Kitty: It's Prussian and it doesn't work.
Edward: Ok, I'll throw it at you. Now put my mug down.
This episode's end titles has Chuck Lorre's Vanity Card #57.