John de Lancie was a guest voice of the villain character Discord in the second season 2-part premier, "The Return of Harmony".
Harmony | The Return of the King | Harmony Korine | Return of the Jedi | New Harmony, Indiana | harmony | Return to Mayberry | The Lord of the Rings: The Return of the King | Return to Peyton Place | Return to Oz | Return from Witch Mountain | Harmony Gold USA | Bone Thugs-N-Harmony | Barbershop Harmony Society | New Harmony | The Return of the King (1980 film) | Return to Treasure Island | Return to the Last Chance Saloon | Law of Return | Harmony (Three Dog Night album) | Harmony Samuels | Harmony Gold | Harmony Books | Bone Thugs-n-Harmony | Bonanza: The Return | The Return of the Pink Panther | Rovers Return Inn | Return to Peyton Place (film) | Return on investment | Return of the Saint |