Big Bang Theory Quote
Amy: Imagine you're looking in a mirror. The image you see looks just like you. That's called symmetrical.
Sheldon: Now imagine you have a billion mirrors, and each of them reflects one thing about you correctly and a billion things about you incorrectly. And imagine the set of incorrect things are floating in an abstract N-dimensional hyperspace. Now imagine there was never a mirror to begin with.
Wil Wheaton: Oh, was that a doorbell?
Amy: I didn't hear anything.
Wil Wheaton: (pressing a button to make a doorbell sound) Huh, there it is again. Sheldon, why don't you answer it?
Sheldon: But I don't know who it is.
Wil Wheaton: Maybe it's a special guest who I invited just to surprise you. Why don't you open it up and find out.
Sheldon: This is a terrible message to send to children.
(directly addressing the camera)
Sheldon: Children, you never open the door if you don't know who's on the other side. You always make your mommy or daddy do it while you hide under the bed and try to imagine what your superhero name will be when you avenge their deaths.
Amy: I'll get it.
Sheldon: But it can't be Silver Shadow. That's mine.
Quote from S12E16 - The D&D Vortex