In Plain Sight, Season 3

Marshall:
You leaving early?

Mary:
I thought I'd go check on Mia, see if she feels like hanging out tonight.

Marshall:
Ah.

Mary:
What? What's that mean?

Marshall:
It implies understanding.

Mary:
No, it implies you think you know something; something even I don't know. "Ah" is Marshall speak for arrogant.

Marshall:
You like her.

Mary:
I don't hate her.

Marshall:
Which for you is tantamount to eternal fealty. Would you go so far as to say under different circumstances you might be, dare I say, friends?

Mary:
What's your point?

Marshall:
No matter what you do or feel for her, she's not going to be here long and that you can't change.

Mary:
Yeah, well, what I can do is make it better. Thanks, sunshine.

Marshall:
I know that you can make it better, just don't make it worse for yourself.

Mary:
I love when you talk to me in greeting card.

Marshall:
I'm serious, Mary. That's why you're so lucky to have me.

Mary:
Where I'm smart, you're an idiot.

Marshall:
Symbiosis personified.