In this competition, it's all about the dark side of history and the bloody weapons that come along with it. Four smiths are tasked with making a knife out of the gruesome guillotine, which beheaded thousands during the French Revolution. The two bladesmiths that survive the testing with their necks intact then have to return home to recreate an even more ghoulish weapon of death--the Executioner's Sword. (thetvdb.com)