Special Guest Stars Henry Winkler as Arthur Fonzarelli Guest Stars Kathryn Ish as Mrs. Marshall Stewart Richard Stahl as Mr. Marshall Stewart Mary Treen as Nana Shotz Co Starring David L. Lander as Andrew J. "Squiggy" Squigman Michael McKean as Leonard "Lenny" Kosnowski Lyman Ward as Tad Shotz Robert Ball as Butler Bob Brunner as Foreman