The Big Bang Theory (2007– )
[repeated line when someone accuses Sheldon of being crazy]
Sheldon: I'm not crazy. My mother had me tested!
[repeated line when Sheldon knocks on Penny's door]
Sheldon: [Knock-knock-knock] Penny!
[repeated line when Sheldon tells a sarcastic joke]
Sheldon: You're not done with her, are you?
Leonard Hofstadter: Our babies are gonna be smart and beautiful.
Sheldon: Not to mention imaginary.
Penny: So, what do you say Sheldon, are we your X-Men?
Sheldon: No. The X-Men were named after the X in Charles Xavier. Since I am Sheldon Cooper, you will be my C-Men.
Howard Wolowitz: [as Sheldon walks away] Oh, that's not a good name.