Guest Stars Charles Aidman as Sam Dobkins Eric Olson as Elmer Dobkins Co Starring Jonathan Gilbert as Willie Oleson Alison Arngrim as Nellie Oleson Michael Landon, Jr. as Jim Mitzi Hoag as Ellen Dobkins Leslie Landon as Kate Dermott Downs as Kenny Bagby John Herbsleb as Joel Turner Wade Alberty as Steve Uncredited Barney the Dog as Jack Cindy Moore as Tall Schoolgirl in White Dress