Donny Most, is best known for his role as Ralph Malph on the hit TV show "Happy Days."

Most explains how Henry Winkler went against his director's wishes to create a defining moment while developing his character Fonzie.

He shares stories about working with Garry Marshall who went on to develop other popular shows such as "Mork and Mindy" and films including "Pretty Woman" and "The Princess Diaries.".