The Planet of Oz (S04E08)

When the Wonder Twins and the Dynamic Duo discover they can't dispel a fierce tornado, the tempest whisks the Hall of Justice away to the enchanting Land of Oz. There, the mischievous Mister Mxyzptlk, having once again eluded capture from the Fifth Dimension, tells the Super Friends that to return home, they must seek out the Wizard. Their journey leads them to a sinister gingerbread house, where the Wicked Witch of the Worst Kind transforms Aquaman into the Scarecrow, Superman into the Tin Man, and Wonder Woman into the Lion.