 Season 5 (1980-81). A brilliant documentary on the fascinating legend of the Holy Grail, the silver chalice which Christ used at the Last Supper. The cup was preserved by Joseph of Arimathea, who took some of Christ s blood in it at the Crucifixion, making it  holy  and  sangreal.  Eventually Joseph fled to Britain, taking the grail with him. It was left to be guarded by holy men there but it vanished because of the impurity of its guardians. Although the Biblical legend ends at this point, the Holy Grail is also a part of the King Arthur legend, in which Sir Galahad is sent on a quest for it. In this century a golden cup was discovered, with a silver cup inside, and it was believed to be he Holy Grail. Since then, however, many historians have felt it was not the grail because it came from a later age.