The Cinquedea: Four bladesmiths must utilise questionable steel from mining tools, before two go on to forge an intricately designed and deadly Italian sword, the Cinquedea. (S4, ep 8)
Talwar: A new group of competitors are tasked with using odd shapes of mystery steel to forge a blade, before two go on to recreate the sacred and lethal Talwar sword. (S4, ep 7)
Akrafena: In the preliminary round, bladesmiths are tasked with forging a Kukri before moving on to the distinctive African Akrafena sword. (S4, ep 6)
Fan's Vote: In a Forged in Fire first, fans vote online to bring back four of their favourite craftsmen for a second shot at victory. (S4, ep 5)
Makraka: The finalists are tasked with crafting the Makraka - the sickle-shaped blade that was the favoured close-range weapon of the Zande warriors of Central Africa. (S4, ep 4)
The Katzbalger: Four competitors look to secure a place in the final where they will be tasked with forging the intricate renaissance side-arm, the Katzbalger. (S4, ep 3)
Deer Horn Knives: Four bladesmiths harvest the steel from a golf club to forge their signature blade, before the finalists must craft a pair of iconic double bladed weapons. (S4, ep 2)
Judge's Pick: For the first time, it's judge against judge when all four pick a past bladesmith to represent them in the ultimate battle for supremacy. (S4, ep 1)
Ultimate Team Challenge: Four master smiths compete alongside their apprentices to forge an iconic weapon of warfare, the trench knife. (S4, ep 30)
The Navaja: Four bladesmiths test their mettle in a rock quarry before two go on to recreate one of the most dangerous folding weapons in history, the Spanish Navaja. (S4, ep 29)