Leonard: Wait, Alex, do you want to join us?
Sheldon: Alex, a moment. I need a word with Dr. Hofstadter.
Do you think it's appropriate for her to sit with us, given her station?
Leonard: Given her what?
Sheldon: If I've learned anything from British television shows on PBS, it's that servants dine down stairs with their own kind.
Sheldon: It's a kindness, Leonard. Otherwise, you're cruelly tempting them with a glimpse of a world that's just beyond their soot-stained fingertips.