Season 4, Episode 12: "The Airport"

There it is. Gate 46. We got plenty of time.

Grossbard's plane leaves in 10 minutes.

I've still got time to catch him.

How? He probably boarded the plane already.

Give me your credit card.

-My credit card? -Give it to me. Don't ask questions.

I'm not giving you my card unless you tell me what it's for.

To buy a ticket to get on that flight.