Henry Winkler appeared as the character Arthur Fonzarelli (a.k.a. The Fonz) from Happy Days in "City on the Edge of Forever". He voiced the snarls of the Big Scary Monster in the episode. He also appeared in the beginning of "Probably", when we jumps over a shark.
He has an abnormally large nose, as well thick, black eyebrows. In "City on the Edge of Forever", he wore a (presumably leather), black jacket, a white undershirt, and blue pants.
- Jumping the Shark is an idiom created by Jon Hein that is used to describe the moment in the evolution of a television show when it begins a decline in quality that is beyond recovery.
- "City on the Edge of Forever (Flashbacks)"
- "Faith Hilling" - Seen in the the book of memes presented by Professor Lamont.