Sheldon: Schrodinger's cat is a thought experiment. A cat in a box is exposed to poison, and is both alive and dead until it is observed.
George Jr.: So the cat's name is Schrodinger?
Sheldon: No.
George Jr.: Well, what's its name?
Sheldon: Its name doesn't matter.
George Jr.: It does if the cat was dead. Otherwise, what are you gonna put on his tombstone?
George Sr.: Not likely the cat's getting a tombstone.
George Jr.: It would in a pet cemetery.

George Jr.: What are you doing?
George Sr.: Separating the whites from the colors.
George Jr.: Whoa, that's racist.

George Jr.: I think the saddest part about it is just how sad it is.

George Jr.: So, Vietnam, like in Rambo.
Tam: Yes.
George Jr.: That's a cool movie.
Tam: Yes.
George Jr.: Are you in it?
Tam: No.

Adult Sheldon: I didn't realize until years later that my father was only asking questions about lightning and thunder to cheer me up. In fact, he would often pretend to be dumb just to make me feel better.

Adult Sheldon: I never did get to see a launch in person, but that was the best trip I ever had. I wish I had told my father while he was alive.

Mary: Wait, Georgie. Where's your bag?
George Jr.: Don't need one. Got my toothbrush right here.
Mary: What about clothes? A change of underwear?
George Jr.: Got it.
Mary: Georgie, you're gonna be gone for two days.
George Jr.: I'll turn them inside out.