Inquisition (1) (R) British documentary series from 2014 This episode: Templars and Cathars. We will examine the reasons why the Knights Templar were accused of heresy and also why Cathars were seen as a huge threat to Rome. This series sheds new light on a dark and bloody chapter of British and European history. We'll hear tales that chill the blood; watch in horror as flames lick around the Marian martyrs and other men of high religion and unshakable beliefs and see ordinary, innocent people fall victim to religious fanatics and psychopaths. From the persecution of religions and faiths, to the hunt for the mysterious Cathars and the Knights Templar, through to the torture and execution of witches, mystics and healers, these programmes chronicle wicked deeds done in the name of faith.