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?

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

Leonard: What am I supposed to do?
Penny: Err, keep your mouth off other women.

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

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

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.

Raj: Hey, this pregnancy had an emotionally-needy third wheel way before you came along.