The TARDIS materializes in Spain in the late sixteenth century. The country is at war with England – and the travellers find themselves on the wrong side of the battle lines.
When Ian and his new friend Esteban are captured by the Inquisition, the Doctor, Susan and Barbara plan to rescue them.
But these are dark days in human history. And heretics face certain death...
William Russell (Ian Chesterton), Carole Ann Ford (Susan), Nabil Elouahabi (Esteban)