Special Guest Stars Henry Winkler as Arthur Fonzarelli Ron Howard as Richie Cunningham Guest Stars Eddie Mekka as Carmine "The Big Ragoo" Ragusa Phil Foster as Frank DeFazio David L. Lander as Andrew J. "Squiggy" Squigman Michael McKean as Leonard "Lenny" Kosnowski F. William Parker as Vernon Co Starring April Clough as Inga Vicki Frederick as Helga Will Hunt as The Preacher