Forged in Fire (2015)

S05E09 The Navaja

In a rugged rock quarry, four bladesmiths face off, challenged to craft blades solely from sourced steel and coal forges. Throughout two grueling rounds, the competitors demonstrate their determination while battling harsh conditions. After a series of punishing tests meant to push their limits, only two smiths make it to the final showdown. Back in their own workshops, they must replicate one of history's most perilous folding weapons — the Spanish Navaja.