THE GREATEST KNIGHT. Dr Saul David investigates the violent world of the medieval melee tournament. Unlike the better known joust, this was a brutal brawl with sharpened weapons, few rules, and one undisputed champion- William Marshal. Saul investigates Marshal's life, discovering his epic rise from a tournament champion to the Regent of England who saved a kingdom on the battlefield. Saul also experiments with Marshal's weapons. ©BBC

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