Season 9, Episode 18: "The Frogger"

It's just some guy, he's been running around Riverside Park, you know...

-...cutting people's heads off. -How have I never read about this?

The police, they've been having some internal dissension about the name.

What are the other titles?

Heads-o. The De-Nogginizer.

-Son of Dad? -Yeah, that was my suggestion.

It's sort of a catch-all.