Robert Stevenson Director Hayley Mills Patti Randall Actor Dean Jones Zeke Kelso Actor Dorothy Provine Ingrid Randall Actor Roddy McDowall Gregory Benson Actor Neville Brand Dan Actor Elsa Lanchester Mrs. William MacDougall Actor William Demarest Wilmer MacDougall Actor Frank Gorshin Iggy Actor Richard Eastham Supervisor Newton Actor Grayson Hall Margaret Miller Actor Ed Wynn Mr. Hofstedder Actor Tom Lowell Canoe Henderson Actor Richard Deacon Drive-in-Mgr. Actor Iris Adrian Mrs. Faber Actor Liam Sullivan Graham Actor The Gordons Screenwriter Bill Walsh Screenwriter, Producer Ron Miller Producer Edward Colman Cinematographer Cotton Warburton Film Editing Bob Brunner Original Music Carroll Clark Art Director William H. Tuntke Art Director Hal Gausman Set Decoration Emile Kuri Set Decoration Bill Thomas Costume Design