Seven competitors return to the forge for a second chance at glory and redemption; they'll have to create four different weapons and survive four rounds of testing; the smiths begin outside using the dreaded coal forge.

The four remaining smiths are tasked with crafting an elegant Yemeni dagger; the intricacies of the dagger prove too much for one, while an intense round eliminates the second; the two finalists must choose the weapons they will forge at home.

Four bladesmiths honor American presidents by forging a replica of Teddy Roosevelt's Rough Rider Bowie; the remaining two smiths move on to their home forge to re-create George Washington's colichemarde.

For the 100th episode, four bladesmiths are tasked with forging a chopper and must choose from a mammoth pile of metals and materials from all previous 99 episodes; the two finalists head home to re-create the O-Katana.

Four smiths must use the canister method to forge a signature blade, but welding failures and abandoned canisters leave some of the competitors scrambling; two smiths return to their home forges to create the Austro-Hungarian Hussar Saber.

Four bladesmiths must forge a blade using steel harvested from a vintage pinball machine; two smiths advance and return home to build a weapon rooted in savagery: the Barbarian Sword.

Four bladesmiths must forge friction folders from a rusty pickup truck; the two smiths left standing head back to their home forges to re-create an exotic weapon wielded by ancient Southeast Asian warriors: the Javanese Kris.

Four bladesmiths are tasked with re-creating the Fairbairn Sykes fighting knife by combining three sizes of W1 round stock; two smiths must forge Japanese Gen. Yamashita's gunto.

Four bladesmiths must forge signature blades from different sizes of spring steel; two smiths survive an intense round of testing and return home to re-create a Greek kopis.

Top bladesmiths from each branch of the U.S. military compete to earn a spot in a battle; four U.S. Army soldiers must forge a special forces V-42 stiletto; two smiths are dispatched to their home forges to build a U.S. Army officer's sword.

In Round Two of the Battle of the Branches Tournament, four airmen from the US Air Force must forge a Bolo knife using the San Mai technique to combine high carbon steel with helicopter parts. Shaping these massive pieces of uncooperative metal into useable steel will take all of the airmen's ingenuity. After rounds of close inspection and brutal testing, two smiths return home to forge a weapon that exemplifies their branch: the Air Force NCO Sword. Written by History Channel

In the third round of the Battle of the Branches, four Marines are tasked with forging one of the most versatile, and iconic combat knives in history: the KA-BAR. As an additional challenge, these smiths must adapt and overcome to forge together metals from a massive anchor using the San Mai technique. After a punishing round of testing, the two surviving smiths return home to forge a weapon that was crucial to history: the Marine Corps Officers Sword. Written by History Channel

Round Four of the Battle of the Branches sets sail as four Naval officers must forge a multipurpose Naval Mark 3 Dive Knife with metal from a giant anchor chain. It's sink or swim as delaminations and forge weld failures plague some of the bladesmiths. After a particularly brutal round of testing, two sailors return home to recreate the intricate and iconic Naval Officer's Sword. Written by History Channel

In the final round of the Battle of the Branches the winning Soldier, Airman, Marine and Sailor return to the forge for the ultimate showdown. Tasked with replicating an iconic M3 Trench Knife from layered damascus in only three hours, the smiths work to showcase their expertise and push themselves to go above and beyond. After a last minute flaw sends one smith packing, the remaining three veterans must face a brutal bout of testing. Ultimately two servicemen persevere and head home to recreate a legendary sword: General George Washington's Lion-headed Cuttoe. Which smith will earn bragging rights for his branch, be crowned Battle of the Branches Champion, and take home the biggest prize in Forged in Fire history: $50,000?

Four bladesmiths are in for a workout when they are tasked with forging signature blades from gym equipment. The competitors flex their skills, battling forge welding failures and warps. After a severe round of testing, the two remaining smiths have only four days in their home forges to recreate one of Japan's deadliest swords: the Nagamaki. Who will master every detail of this giant weapon and emerge as the Forged in Fire Champion, earning the $10,000 prize?

Four bladesmiths aim for the stars when they are tasked with forging fantasy blades from a meteorite. Forced to use the canister method, the smiths battle difficult forge welds in order to create their one of a kind blades. After a ruthless bout of testing sends one smith back to the real world, the final two head to their home forges to recreate a legendary weapon: Attila the Hun's Sword of Mars. Written by History Channel

Four bladesmiths fight fire with fire when they must dismantle a forge and use that steel to construct a blade. The competition gets heated as the smiths struggle to salvage enough material to create a san mai billet, leading one competitor to crack under the pressure. After a punishing round of tests, the final two return to their home forges where they have just four days to recreate one of history's most elegant weapons of war: The Partizan. Written by History Channel

Four bladesmiths face triple the challenges when they must forge a canister Damascus blade from three different steels using three separate cans. Keeping their canisters and blades straight proves easier said than done, and Round 1 gives one of the competitors a tough break. After a rough round of testing, two finalists head back to their home forges to recreate not one, but two of history's most reliable hunting weapons: the Messer and Bi-knife. Written by History Channel

Four bladesmiths are dispatched to the snowy winter tundra to forge a kukri with steel harvested from an old snowmobile. Provided with no power tools, the smiths might fight to forge their blades with just hand tools and the dreaded coal forge. After a physically and mentally exhausting outdoor round, one smith is eliminated before ever reaching the comfort of the indoor forge. At the forge, another contestant is eliminated after a particularly brutal round of testing. The two remaining smiths head home to forge a massive and intricate sacrificial sword from South Asia: the Ram Dao. Written by History Channel

It's anyone's game when four bladesmiths are tasked with forging blades from old toys using the san mai technique. The smiths realize playtime is over as the pressure of the competition heats up and they experience difficult delaminations. A dangerous slip-up during Round Two reminds the competitors to not play with sharp objects. After a ruthless round of testing, two smiths return to their home forges to recreate an iconic American blade: the M1832 Foot Artillery Sword. Written by History Channel

On the 50th anniversary of the first steps on the moon, four bladesmiths compete to recreate a space-age M-1 NASA Survival Knife out of ball bearings. These knives must not only be worthy of interstellar flight but also overcome a triple strength and durability test. Only bladesmiths with NASA worthy engineered blades will continue onto the third round to return home and construct a Spiked Mace. Which smith will blast off past the competition, earning the title of Forged in Fire Champion, and a check for $10,000? Written by History Channel

It's a battle royale for four bladesmiths when they are tasked with forging signature blades with an integral knuckle duster from a steel cage and barbed wire. Getting a solid billet from these steels is a challenge all on its own, but forging a functional handle from the same piece is a whole different story. After two frantic rounds and a brutal weapons test, two finalists return to their home forges for one final challenge. They must recreate one of Scotland's most famous and feared weapons: the Lochaber Axe. Which axe will lock in the title of Forged In Fire Champion and take home the $10,000 prize?

Four bladesmiths are given a special assignment when they are tasked with forging Doug Marcaida's favorite blade: the Karambit. The competitors are in for twice the challenge when they must create a matching pair of the lethal knives. After Doug and the judges put these weapons through their paces, only two bladesmiths remain and return to their home forges to re-create a weapon that's both deadly and debonair: The Cane Sword. Whose blade will demonstrate that looks can kill and be handsomely rewarded with a check for $10,000 and the title of Forged in Fire Champion?

Four bladesmiths must scavenge a construction site to salvage their own knife-making materials. The smiths are then presented with an additional physical challenge when they are required to use a hand-cranked coal forge for the first round. After a critical error sends one competitor home, the three remaining bladesmiths must move on to the even more challenging round 2. Eliminating one more smith, the remaining two head to their home forges where they'll attempt to re-create a historic hunting weapon: The Boar Sword. Which smith will return to the forge with a weapon mighty enough to be crowned Forged in Fire Champion and earn a check for $10,000?

The odds are stacked against four bladesmiths when they must each forge a chopper in a distinct Damascus pattern. The ladder to success is full of twists as they struggle to achieve the specific look of each pattern. After surviving an intense round of testing, two smiths return home to recreate one of the most widely used and dangerous medieval weapons: the Falchion. Which smith will dominate the competition in form and function, earning the title of Forged in Fire Champion and $10,000?

Four bladesmiths must start at the bottom when they are tasked with creating ladder pattern damascus knives from a real ladder. After they salvage their metal the competitors must go step-by-step to create this intricate design, which proves to be no easy feat. One smith struggles in the intense conditions to even make it out of Round one. When a second competitor falls after a brutal round of testing, the remaining two smiths head home to recreate a battle sword wielded by one of history's military geniuses: Napoleon Bonaparte. Which smith can create a saber worthy of the Emperor himself, earning the title of Forged in Fire Champion and a prize of $10,000?

With a small variety of metal objects to choose their metal from, four new competitors attempt to forge a knife in their own style. In five days, the final pair must create in their own forge a Moro Kris sword, a blade with roots dating back to 300BC, in the season finale of this suspenseful and fiery History Channel series.

With a small variety of metal objects to choose their metal from, four new competitors attempt to forge a knife in their own style. In five days, the final pair must create in their own forge a Moro Kris sword, a blade with roots dating back to 300BC, in the season finale of this suspenseful and fiery History Channel series.

With a small variety of metal objects to choose their metal from, four new competitors attempt to forge a knife in their own style. In five days, the final pair must create in their own forge a Moro Kris sword, a blade with roots dating back to 300BC, in the season finale of this suspenseful and fiery History Channel series.

With a small variety of metal objects to choose their metal from, four new competitors attempt to forge a knife in their own style. In five days, the final pair must create in their own forge a Moro Kris sword, a blade with roots dating back to 300BC, in the season finale of this suspenseful and fiery History Channel series.

With a small variety of metal objects to choose their metal from, four new competitors attempt to forge a knife in their own style. In five days, the final pair must create in their own forge a Moro Kris sword, a blade with roots dating back to 300BC, in the season finale of this suspenseful and fiery History Channel series.

With a small variety of metal objects to choose their metal from, four new competitors attempt to forge a knife in their own style. In five days, the final pair must create in their own forge a Moro Kris sword, a blade with roots dating back to 300BC, in the season finale of this suspenseful and fiery History Channel series.

With a small variety of metal objects to choose their metal from, four new competitors attempt to forge a knife in their own style. In five days, the final pair must create in their own forge a Moro Kris sword, a blade with roots dating back to 300BC, in the season finale of this suspenseful and fiery History Channel series.

With a small variety of metal objects to choose their metal from, four new competitors attempt to forge a knife in their own style. In five days, the final pair must create in their own forge a Moro Kris sword, a blade with roots dating back to 300BC, in the season finale of this suspenseful and fiery History Channel series.

With a small variety of metal objects to choose their metal from, four new competitors attempt to forge a knife in their own style. In five days, the final pair must create in their own forge a Moro Kris sword, a blade with roots dating back to 300BC, in the season finale of this suspenseful and fiery History Channel series.

With a small variety of metal objects to choose their metal from, four new competitors attempt to forge a knife in their own style. In five days, the final pair must create in their own forge a Moro Kris sword, a blade with roots dating back to 300BC, in the season finale of this suspenseful and fiery History Channel series.

With a small variety of metal objects to choose their metal from, four new competitors attempt to forge a knife in their own style. In five days, the final pair must create in their own forge a Moro Kris sword, a blade with roots dating back to 300BC, in the season finale of this suspenseful and fiery History Channel series.