Being cool is… well, cool. That life lesson was instilled on a generation of TV watchers by Henry Winkler as Arthur Fonzarelli, aka "The Fonz" or "Fonzie" from the 1950s-set ABC sitcom Happy Days.

Hello, sailor! For Happy Days‘ leather-clad cool guy The Fonz, that playful greeting could really mean “Hi, dad!” After years of claiming he hadn’t seen his papa since he was a kid (more on that in a ...