The Big Bang Theory, Season 6

[Penny answers the door. Leonard is playing his cello outside.]

Leonard:
[singing, to the tune of Mary Had a Little Lamb] I'm sorry Alex hit on me, hit on me, hit on me. I'm sorry Alex hit on me, I'd no idea I'm cute.

Penny:
Oh, damn it, you are.

Leonard:
Please forgive me. I should have told you about Alex.

Penny:
I don't care about Alex. Fine, I care. Okay, I hate that bitch. But what really hurt is that you liked it so much. I mean, do I need to be worried?

Leonard:
Of course not. No. Why?

Penny:
Because, she is pretty and smart, and when you talk about work, she doesn't have to go home and look up words in the dictionary to understand what you said.

Leonard:
You do that?

Penny:
[pause] No.

Leonard:
Hang on. Are you feeling insecure? Because that's my thing, and if you take it away, I don't know what I'm bringing to this relationship.

Penny:
Yes, Leonard, I am insecure. Happy?

Leonard:
No, I'm not happy.

Penny:
Why are you smiling?

Leonard:
I'm sorry. I just never think of you having feelings like that.

Penny:
Well, I do.

Leonard:
Why? Nothing is ever going to happen between me and Alex.

Penny:
Good.

Leonard:
Come here. Tell you a secret?

Penny:
What's that?

Leonard:
With all these women chasing me, I kind of do feel like Captain Kirk.

Penny:
Can I tell you a secret?

Leonard:
Sure.

Penny:
Keep talking about Captain Kirk, and we're all gonna stop.

Leonard:
Message received.