From Robin Williams' debut as Mork to the infamous 'jump the shark' moment, here are five essential episodes of Happy Days.

It’s hard to think of Happy Days without Fonzie, but when the series premiered in January 1974, the character portrayed by Henry Winkler was a bit player. Arthur “Fonzie” Fonzarelli was a minor, ...

These days, it’s common parlance for TV fans to talk about a show “jumping the shark” when it starts declining in quality, usually due to some unexpected plot point or storyline. The origins of the ...