Forged in Fire: Season 6, Episode 4

6 - 4: The O-Katana

For the special 100th episode of Forged in Fire, four bladesmiths are tasked with forging a chopper and must choose from a mammoth pile of metals and materials from all previous 99 episodes. Some of the smiths are doomed to repeat the past, making mistakes made by former competitors. After a fiery round of tests, the two finalists head home to recreate one of the most epic swords in the history of this competition: the O-Katana.