Amy: Now, I'm gonna look at some pictures to prompt an emotional response, and we'll see if the machine can identify them accurately.
Howard: Okay, remember, it can only detect happy, sad, angry and excited. Not other things you're feeling, like, "What have I done with my life?"

Howard: You know, I'm really glad you decided to learn Mandarin.
Sheldon: Why?
Howard: Once you're fluent, you'll have a billion more people to annoy instead of me.

Josh: So, I have to ask, was the robot sexy?
Howard: It was actually just a mechanical hand.
Josh: 'Cause that's all you need, right?
Howard: You are my brother.

Sheldon: Sheldon Cooper does not cry.
Howard: That's true, you'd rust.

Leonard: He really worked with the Drug Enforcement Agency?
Penny: He didn't know it 'til he was cuffed, but yeah.

Amy: Well, everybody has things that they need help with. Like me. I can't see without my glasses. And right now you're just a cute, pink smudge wearing a childish green smudge.

Bernadette: You know, I just read that a team at MIT developed a device that helps people read human emotions.
Leonard: And you think we can get those guys to reprogram Sheldon? Cool.