Lilith and Lucifer in “Unfinished Business”

Lucifer, that ring is the only thing in the entire Universe that means anything to me. I'm going to get it back. And you are going to help me.

Lucifer

Uh-huh. And why would I do that?

Because you owe me.

Lucifer

[realizing] Right. That. The Devil solving crime. It's the most ridiculous thing I've ever heard.