Guest Stars Wayne Heffley as Mr. Kennedy Chuck McCann as Tinker Jones Co Starring Alison Arngrim as Nellie Oleson Tracie Savage as Christy Kennedy James Jeter as Hans Dorfler Jimmy McNichol as Harry Baker Eileen Ryan as Eileen Kennedy Uncredited Jonathan Gilbert as Willie Oleson Barney the Dog as Jack Ruth Foster as Melinda Foster Cindy Moore as Tall Schoolgirl Jaye Durkus as Townsman Robert Hoffman as Sandy Kennedy Tex Lambert as Townsman Sean Penn as Kid