A Protestant businessman, Jean Calas, is tortured to death for allegedly killing his son to stop him becoming a Catholic. Voltaire launches a Europe-wide campaign to win rehabilitation for Calas and compensation for his family.
| Actor | Role |
|---|---|
 Claude RichVoltaire | Voltaire |
 Barbara SchulzMarie Corneille | Marie Corneille |
 François GermondJean Calas | Jean Calas |
 Carlo BrandtDavid de Baudrigue | David de Baudrigue |