Tommy Rettig Jeff Miller Actor Jan Clayton Ellen Miller Actor George Cleveland "Gramps" Miller Actor Joey D. Vieira Sylvester "Porky" Brockway Actor Paul Maxey Matt Brockway Actor Jon Provost Timmy Actor Arthur Space Doc Weaver Actor Florence Lake Jenny Actor Carla Balenda Miss Hazlit Actor Bob Foulk Sheriff Miller Actor Cloris Leachman Ruth Martin Actor Jon Shepodd Paul Martin Actor George Chandler Uncle Petrie Martin Actor June Lockhart Ruth Martin Actor Hugh Reilly Paul Martin Actor Todd Ferrell Boomer Bates Actor Andy Clyde Cully Wilson Actor Robert Bray Corey Stuart Actor Clyde Howdy Hank Actor Jed Allan Scott Turner Actor Jack De Mave Bob Erickson Actor Mark Miranda Neeka Actor Ron Hayes Garth Holden Actor Robert Burton Ron Holden Actor Josh Albee Mike Bishop Actor Larry Wilcox Dale Mitchell Actor Joan Freeman Sue Lambert Actor Sherry Boucher Sue Lambert Actor Larry Pennell Keith Holden Actor Pamelyn Ferdin Lucy Baker Actor Radames Pera Willy Carson Actor Stuart Lee Lane Actor Karl Swenson Karl Burkholm Actor Jay W. MacIntosh Elaine Baker Actor