Writer and philosopher Voltaire, loyal to his king, Louis XV of France, nonetheless writes scathingly of the king's disdain for the rights and needs of his people. Louis admires Voltaire, but is increasingly influenced against him by his minister, the Count de Sarnac.
| Actor | Role |
|---|---|
 George ArlissVoltaire | Voltaire |
 Margaret LindsayNanette Calas | Nanette Calas |
 Doris KenyonMme. Pompadour | Mme. Pompadour |
 Alan MowbrayCount de Sarnac | Count de Sarnac |
 Reginald OwenKing Louis XV | King Louis XV |
 Theodore NewtonFrançois | François |
 Gordon WestcottThe Captain | The Captain |
 Murray KinnellEmile, Voltaire's Servant | Emile, Voltaire's Servant |
 Doris LloydMme. Clarion, Actress | Mme. Clarion, Actress |
 David TorrenceDr. Tronchin | Dr. Tronchin |
 John GeorgeProtester in Montage | Protester in Montage |