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Japanese Katana: Four bladesmiths compete for a $10,000 prize by forging the finest Japanese Katana blade - a weapon designed to cut as it is unsheathed. (S1, ep 1)
Crusader Sword: The bladesmiths are tasked with utilising a Japanese hardening technique, before the two finalists forge the legendary Crusader Sword. (S1, ep 2)
Chakram: Four bladesmiths compete to make the best weapon out of reclaimed metal, with the best two going forward to create a deadly Indian throwing weapon - the chakram. (S1, ep 3)
Viking Battle Axe: After forging a weapon out of a "train spring", the two remaining bladesmiths will have to create a mighty Viking battle axe to prove their skill. (S1, ep 4)
Katar: The competitors create their signature blade by using the Hada technique. The pressure mounts as one of the smiths is pushed to his breaking point. (S1, ep 5)
The Elizabethan Rapier: The forge heats up as the two selected bladesmiths forge the rapier, a sharply pointed sword that can kill with just one thrust. (S1, ep 6)
The Roman Gladius: After crafting a weapon from just a steel ball bearing, the two finalists must create one of the most important weapons in history - the Roman Gladius. (S1, ep 7)
The Moro Kris: After a signature weapon trial, the two finalists have five days to forge the Moro Kris sword - a legendary weapon that dates back to 300 BC. (S1, ep 8)
The War Hammer: After dumpster diving for the best blade materials, the two finalists must forge the mightiest war hammer they can and strike the winning blow. (S2, ep 1)
Khopesh: After being tasked with forging a weapon from cable steel, the best smiths must create an Egyptian Khopesh. (S2, ep 2)
The Scottish Claymore: Four bladesmiths have to work without any electricity in a gruelling qualifier, before the two finalists must forge the legendary Scottish Claymore. (S2, ep 3)
Spiked Shield: After being tasked with forging a blade from three or more different metals, the two finalists must prepare to craft a spiked shield. (S2, ep 4)
Viking Sword: Four bladesmiths are tasked with creating weapons from old car materials, before the two finalists compete to forge the best Viking sword. (S2, ep 5)
Nepalese Kukri: After a rigorous first round qualifier, two bladesmiths will compete to make one of the most lethal weapons in military history, the Nepalese Kukri. (S2, ep 6)
The Shotel: After forging carbon steel and wrought iron into a fully functional weapon, two finalists move on to create the uniquely curved Ethiopian Shotel. (S2, ep 7)
The Cutlass: The contestants transform failed blades from last season into fully functional weapons, before the finalists forge the legendary pirate cutlass sword. (S2, ep 8)
Tabar: After using lawnmower blades to forge signature weapons, the bladesmiths will hope to cut their competition down to size with the Tabar, a south Asian battle axe. (S2, ep 9)
Champions Edition: Season three begins with the return of four champions who are charged with making a high-carbon-steel inlay. (S3, ep 1)
Fan Favourites: Four former contestants return for a second chance, with the two finalists charged with creating a Hook Sword. (S3, ep 2)
Butterfly Swords: Four contestants forge a signature blade from a pile of tools with the two survivors charged with crafting two Chinese Butterfly Swords to become the champion. (S3, ep 3)
The Falcata: Four bladesmiths must create a blade out of high carbon steel while also forging the hammer they'll use to make it. (S3, ep 4)
Kora Sword: This time, the swordsmiths compete for a chance to craft a sacrificial sword from history which could reportedly cut a sheep in half with one swing. (S3, ep 5)
Hunga Munga: Four new bladesmiths compete for a chance to forge a Hunga Munga - a four-edged behemoth of a weapon. (S3, ep 6)
The Boar Spear: With a variety of metal objects to choose their metal from, four new competitors attempt to forge a knife in their own style before taking on the Boar Spear. (S3, ep 7)
Xiphos Sword: Four custom knife makers compete to make the best usable knife through a series of challenges. Bladesmiths craft the classic Greek Xiphos Sword. (S3, ep 8)
Cavalry Saber: Four new bladesmiths face the challenge of forging the barrel of a gun into a knife, before two go on to forge the iconic Cavalry Saber. (S3, ep 9)
The Pandat: Two bladesmiths will have just five days to create a Dayak war sword, the Pandat. Will the blade's unique shape leave victims in its wake? (S3, ep 10)
The Naginata: Four bladesmiths must create a signature blade using a randomly chosen mystery technique, before two are chosen to forge the Japanese Naginata. (S3, ep 11)
Zulu Iklwa: After forging a bayonet blade and attaching it to a rifle, two bladesmiths will be called upon to create the legendary African blade, the Zulu Iklwa. (S3, ep 12)
The Haladie: After using high carbon steel to forge a hatchet, the two finalists must create an ancient Indian weapon used to both stab and slice. (S3, ep 13)
The Zweihander: Four competitors must weld blades from tiny cubes of steel before two go on to forge the mighty German Zweihander. (S3, ep 14)
The Pata: Former winners return for the chance to craft a weapon known for its unique mechanics and deadly double-edged blade: the pata. (S3, ep 15)
Redemption: Four previously eliminated bladesmiths return to the forge for a shot at redemption, but they face a challenge more difficult than they could imagine. (S3, ep 16)
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)
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)
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)
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)
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)
Akrafena: In the preliminary round, bladesmiths are tasked with forging a Kukri before moving on to the distinctive African Akrafena sword. (S4, ep 6)
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)
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)
The Charay: The competitors are tasked with turning salvaged junkyard steel into a weapon, before two go on to craft the legendary Charay sword. (S4, ep 9)
Sword Breaker Redemption: Four eliminated competitors return, using recycled jackhammer steel in the signature round, before crafting the Sword Breaker blade in the final. (S4, ep 10)
Master & Apprentice: Masters compete alongside their apprentices as they take turns on the forge floor, crafting a cleaver using the jellyroll technique. (S4, ep 11)
The Kachin Dao: After two turbulent nautically themed rounds, two smiths head the final round to forge the Kachin Dao, a deadly headhunting sword. (S4, ep 12)
The Gladiators' Scissor: After a first round besieged with setbacks, two bladesmiths go on to the finals to craft an Ancient Roman gladiator's scissor. (S4, ep 13)
Ngombe Ngulu: The competing smiths must forge a weapon from an elevator cable, before two go on to recreate the African Ngombe Ngulu - an executioner's sword. (S4, ep 14)
Tabar Shishpar: Four more bladesmiths head into the forge to prove they have the mettle to master metal. (S4, ep 15)
The Shamshir: The contestants get to work on a unique bowie knife in the first round, before two will go on to craft a deadly sabre called The Shamshir. (S4, ep 16)
The Kampilan: Four bladesmiths head to a scrap yard to create their signature blades, then recreate a fearsome battle weapon known as the kampilan. (S4, ep 17)
The Kpinga: After layering a complex Damascus pattern in their signature blades, the remaining competitors recreate a three-bladed African throwing knife called the Kpinga. (S4, ep 18)
The Yatagan: The smiths are tasked with turning a rusted 1971 Mercury Cougar into their signature blades, before creating an elite military weapon known as the Yatagan. (S4, ep 19)
International Championship: Four of the top smiths from around the world compete in an international championship, with the best two crafting a Spadroon in the final. (S4, ep 20)
Knights Templar: The smiths must forge together rusty chain mail and high quality steel to produce weapons used by the Knights Templar. (S4, ep 21)
Ultimate Champions Edition: Five champions return to the anvil, with the final two competing to craft the finest Tai Chi sword. (S4, ep 22)
Viking Edition: Competitors march into a dry moat where they resurrect old swords and forge them into a Viking Seax. (S4, ep 23)
The Horseman's Axe: Four bladesmiths are pushed to their limits when they must forge a signature blade from springs of steel, before recreating the mighty horseman's axe. (S4, ep 24)
Jumonji Yari: After forging functional friction holders, two finalists go on to craft a Japanese trident called the Jumonji Yari, a weapon of unparalleled strength. (S4, ep 25)
The Schiavona: The bladesmiths must harvest steel from farming tools before crafting the decorated and deadly Schiavona sword.
The Rhompaia: The bladesmiths are forced to achieve one of six Damascus patterns for their first round blade, before two go on to forge the fearsome Rhomphaia sword.
Sica Sword: The smiths must forge a signature blade out of a flintlock pistol before two go on to craft the lethal gladiator sword, the Sica. (S4, ep 28)
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)
Ultimate Team Challenge: Four master smiths compete alongside their apprentices to forge an iconic weapon of warfare, the trench knife. (S4, ep 30)
Rookies Edition: Five novice smiths must earn their way into the competition before the forge is even lit, before recreating a 16th-century weapon known as the War Golok. (S5, ep 1)
The Kabyle Flyssa: The bladesmiths are challenged to salvage a cannon to make signature blades, and the finalists recreate the North African Kabyle Flyssa. (S5, ep 2)
Karabela: Four bladesmiths are tasked with forging blades out of steel from a chain and a sprocket, before moving on to craft the iconic Karabela sabre. (S5, ep 3)
The Zande Spear: Four bladesmiths must forge J. Nielson's favourite blade, a Damascus European dagger, before moving on to the Zande spear. (S5, ep 4)
The German Halberd: After a testing qualifier, two smiths head home for the final round to recreate the German Halberd, a medieval-era triple threat. (S5, ep 5)
The Two-Handed Sword: The bladesmiths harvest steel from motorcycles to forge blades in their signature style, before two craft a giant two-handed sword in the final. (S5, ep 6)
The Kelewang: After two challenging rounds of signature crafting two smiths recreate a beautiful but deadly Indonesian sword, the Kelewang. (S5, ep 3)
Bagh Nakh Blades: The bladesmiths are forced to make canister damascus using nuts and bolts before two must recreate a pair of deadly Indian Bagh Nakh weapons. (S5, ep 4)
The Glaive Guisarme: After forging the iconic Ka-Bar military blade using only tiny cubes of W-1 steel, finalists are challenged to craft the battle-tested glaive guisarme. (S5, ep 5)
Pioneer Sword: Four smiths must forge a multipurpose weapon from old rescue tools, before two go on to recreate a unique utilitarian tool, the Russian Pioneer Sword. (S5, ep 6)