Charmed, Season 3

Victor:
Hm. Leo, I think it's time to come clean.

Leo:
You do?

Victor:
Yeah. I need to talk to you about something, man-to-man.

Leo:
Man-to-man.

Victor:
Well, from one mortal to another. Leo, it's not easy being married to a witch.

Leo:
No?

Victor:
That's why my marriage to Piper's mother didn't work out. It wasn't because I didn't love her, but because I wasn't prepared for what was to come.

Leo:
Well, I think I'm prepared, sir. Uh, I mean, Victor.

Victor:
Well, don't get me wrong, Leo. I want this marriage to succeed, that's why I'm warning you. But there are dangers out there worse than demons and warlocks. You do know about them, don't you?

Leo:
Yeah, sure.

Victor:
Well the dangers I'm talking about, you're not even going to see it coming. The thing I'm talking about will just sneak up on you (snaps his fingers in front of Leo's face) and destroy your marriage if you're not careful. Leo, do you know what a whitelighter is?

Leo:
Um...