Sheldon: Leonard is upstairs right now with my archenemy.
Penny: Your archenemy?
Sheldon: Yes: the Dr. Doom to my Mr. Fantastic, the Dr. Octopus to my Spiderman, the Dr. Sivana to my Captain Marvel…
Penny: OK, I get it, I get it…
Sheldon: You know, it’s amazing how many supervillains have advanced degrees. Graduate schools should do a better job of screening those people out.
