Season 4, Episode 20: "The Junior Mint"

-How's the guy? -He's okay.

In fact, him and Elaine are getting pretty chummy.

Now Elaine wants me to buy some of his art.

-That's nerve. -Yeah. So she and triangle boy...

...can go out to fancy restaurants.

You know what it is?

It's Clara Nightingale Syndrome.

-He falls ill, she falls in love. -You mean Florence Nightingale.