Sheldon: Oh! Remember when we got this at Comic-Con?
Leonard: Oh, yeah. The Mr. Spock cuckoo clock.
Clock: Live long and prosper. Live long and prosper. Live long and prosper. Live long and prosper.
Sheldon: It's one of a kind.
Penny: So if it breaks there'd be none of it?

Penny: At one point, they had me figure out how to get a banana out of a puzzle box.
Leonard: Wait, Sheldon gave me a banana in a box. He was testing me, too.
Penny: Unbelievable.
Leonard: And how could a chimp even solve that? That was impossible.
Penny: Really? You couldn't get it out?

Leonard: If I take it off, Sheldon wins.
Penny: Sweetie, every night you don't kill him in his sleep, he wins.

Sheldon: Woman, you are playing with forces beyond your ken.
Penny: Yeah, well your Ken can kiss my Barbie.

Sheldon: If it's like your 3-D chess game, then you're out of your length, width and depth. Amy, get the Neosporin, somebody just got burned.

Leonard: Sheldon, I know what you did, now change the password back.
Sheldon: Well, powder me in sugar and call me a donut, if it isn't Leonard Hofstadter.

Sheldon: It's not my fault I'm bad at sharing; I skipped kindergarten.