Amy: What's with the blinking?
Sheldon: It's Morse code. So we can talk about without hurting --'s feelings.
Amy: Sheldon, I don't know Morse code.
Howard: I do. And if you have something to say, you can say it to my face.

Sheldon: I always looked up to you and Pop-Pop. I know what a challenging man he could be, but I saw you stand by him and make him into a better person.
Meemaw: I did.
Sheldon: Yeah, well, that is exactly what I've been doing the last five years with this little work in progress.
Leonard: He never disappoints, does he?

Meemaw: Sheldon, tell this girl that my ring will never be on her finger.
Sheldon: Yeah, I'm gonna opt out of that one, too.

Penny: Yeah, the last time I got a hand written letter, it was from someone who told me I parked like a blind person.
Leonard: That someone has a name.
Sheldon: Uh, thank you.

Sheldon: Hello?
Leonard: Oh, hey, where you been? We've been calling you for hours.
Sheldon: Oh, I'm sorry, my phone was on "airplane" mode.
Leonard: Why?
Sheldon: Because I was on an airplane. (makes confused gesture to Amy)

Amy: I thought we agreed on June 15.
Sheldon: That's the day after Flag Day. Everyone'll be partied out.

Penny: Do you even like the Beach Boys?
Sheldon: They have "beach" right in the name. What do you think?

Sheldon: Some news of our wedding. I have sent you all a "save the date" e-mail.
Penny: Oh, exciting. You guys picked a date?
Sheldon: Better. I picked 80 dates. And I need you to save them all until we narrow it down.

Sheldon: Read it back to me?
Leonard: Oh, hang on. "Yes, one might question the $20 billion "to build and run the Large Hadron Collider, but on the other hand..."
Sheldon: Okay. Um, oh, oh! "On the other hand, contrary to predictions, the collider didn't create a small black hole that devoured the Earth and life as we know it." So, money well spent.

Bert: Hey, Sheldon.
Sheldon: I've been thinking about it, and I suppose I could help you with your research.
Bert: What changed your mind?
Sheldon: Bert, I'm a gift horse. Don't look me in the mouth.

Raj: And you know we get to name it.
Sheldon: We better choose a name no one can make fun of. Sir Frederick William Herschel didn't do Uranus any favors.

Leonard: Maybe you should consider women who aren't in serious relationships with your closest friends?
Sheldon: There's that prostate doctor, but I'm still mad at her.

Sheldon: Stephen Hawking is a genius. If he said 'no,' I wasn't going to waste time on her father.

Sheldon: So that's all this day was? A plan to butter me up before delivering bad news?
Leonard: Come on, buddy.
Sheldon: No, I thought we were friends. You asked for a sip of my Icee. If you had your own straw, I might've said yes.

Sheldon: Well, I found the perfect wedding date.
Amy: That's terrific!
Sheldon: No, it's not. It was May 19, 1996. We would have had a lovely wedding. And our honeymoon would have coincided with the first appearance of the Hale-Bopp comet.
Amy: Sheldon, you were 16.
Sheldon: And in Texas. No one would have batted an eye. Oh, wait, it's no good. That's the day that Jon Pertwee, the third Doctor Who, died.
Amy: And it's in the past.
Sheldon: Hey-hey, I said it's no good. Just let it go.