The bladesmiths must transform a steel "train spring" into a weapon of their choosing. Only two competitors will move on and are given just five days to forge a legendary Viking Battle Axe. After a barbaric round of testing from the judges, only one man will be left standing.

The forge heats up as our four bladesmiths struggle create a special Japanese hardening technique on their signature blades. After a difficult first round of testing, the remaining two bladesmiths head home with just five days to forge the legendary Crusader Sword. With their battle-ready weapons in hand, they're put through a brutal round of medieval testing; but only one can emerge victorious and be crown the Forged in Fire champion.