In the sixteenth century, Francis Barnard travels to Spain to clarify the strange circumstances of his sister's death after she had married the son of a cruel Spanish Inquisitor.
| Actor | Role |
|---|---|
 Vincent PriceNicholas Medina / Sebastian Medina | Nicholas Medina / Sebastian Medina |
 John KerrFrancis Barnard | Francis Barnard |
 Barbara SteeleElizabeth Barnard Medina | Elizabeth Barnard Medina |
 Luana AndersCatherine Medina | Catherine Medina |
 Antony CarboneDoctor Leon | Doctor Leon |
| PPatrick WestwoodMaximillian | Maximillian |
 Lynette BernayMaria | Maria |
| MMary MenziesIsabella | Isabella |
| CCharles VictorBartolome | Bartolome |
| LLarry TurnerYoung Nicholas | Young Nicholas |
 Randee Lynne JensenExtra (uncredited) | Extra (uncredited) |