Forged in Fire - Season 5 Episode 21 -

Four bladesmiths go nuts when they are tasked with forging a signature blade from W2 and a giant industrial-sized nut. Their blades must survive a brutal Forged in Fire first when they face not one, but two unforgiving strength tests. Only two smiths advance and head back to their home forges to recreate an iconic ancient iron weapon: the Celtic Anthropomorphic Sword.