Rather than adapt a later or create a new Oz story, this production has Dorothy still in posession of the shoes, and she clings to an apple tree during a tornado which takes her back to Oz. The Scarecrow, Tin Woodman, and Lion (using the names created for the nearly-abstract television series, Tales of the Wizard of Oz, from which this was derived) have had their MGM gifts destroyed by the restored Wicked Witch, and the four proceed to the Wizard for help, who is ineffectual as usual.
