Big Bang Theory Quote
Leonard: Thought you were getting us dinner.
Penny: Sorry. I had to stop at Sheldon's and help him solve string theory.
Amy: (dumbfounded) What?
Penny: Yeah, turns out the answer's knots.
Leonard: That's cute, but you can't have knots in more than four dimensions.
Penny: (heading towards the bedroom) Mm... you can if you consider them sheets. Good night.
Quote from S11E13 - The Solo Oscillation