Castiel, Benny and others in “Unfinished Business”

Castiel

It does present a curious curl in the metaphysics, doesn't it? If you murder a monster in monster heaven, where does it go?

Benny

And this is the crazy aunt I want to take on the road?

Castiel

I am not your aunt.

Benny

What? Really?

Castiel

I have no possible relationship to your sibling offspring.

Benny

Now you're kidding me.

Dean

Oh, you two are killing me.