Some of the world's most iconic sacred temples were built atop the ruins of structures that are far more ancient. Do these locations hold powers?

Some believe that bones can bring good luck, or even allow us to speak with the dead. But is it possible that our bones hold some sacred power - or perhaps even our souls?

The team returns to find new evidence of a mysterious anomaly in the sky one mile above the Triangle Area that may be connected to something deep within the Mesa.

The buyers go to Moreno Valley, Calif.; Darrell tries to play nice; Barry Weiss lands an uncertain score.

Super Bros. Shuffle: Jarrod and Brandi land an item in Costa Mesa that could be worth $25,000. Darrell is onto a winner too when he scores some Super Mario memorabilia.

Scientists have forever been involved in a quest to understand the universe. But for each answer science provides, more questions arise.

The most sacred relic of the ancient world: The Ark of the Covenant. Could descriptions of the Ark's incredible power reveal that it was a highly advanced technological device?

Four men enter the forge and are given the twisted challenge of having to forge blades from a giant elevator cable. Which smiths will unravel after two challenges and a brutal round of testing?

Things go nuclear when a Japanese Godzilla toy hits the counter. Can Corey come out on top before he's crushed? Next, Chum does battle over a leather jacket from WW2 - but will his offer bomb?

Cameras capture the good, the bad and the ugly as, in an unprecedented live event, Ton and Allen attend an exclusive high-end auction and attempt to turn a profit in just one hour!

When an early handheld video game system comes into play, Corey tries his utmost to make a deal.

Four more bladesmiths head into the forge to prove they have the mettle to master metal.

An unassuming mum tries to pull the wool over Ton and Allen's eyes in Arlington, Virginia. The guys uncover a 15th century black powder cannon and a Russian military motorcycle.

RC/DC: A signed AC/DC album and a Beals Model Remington revolver give the team pause for thought. Plus, Rick searches for new ways to publicise the pawn shop.

Hiding Houdini: The team are spellbound when a book signed by the great Harry Houdini appears in the shop. Corey spots an old X-ray unit and Chum takes a vow of silence.

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.

The smiths must recreate a fearsome battle weapon, the Kampilan. Their weapons must survive brutal testing, and only one will pull through by a hair to claim the title of Forged In Fire Champion.

King Darrell is on a mission to defend his throne, but Rene and Casey have other ideas. Meanwhile, Kenny gets bowled over by his locker and Lisa manages to rope something decent.

Barry is ready to learn, and shows up at the auction with a present for a certain someone. Brandi and Bozek's spirits get a lift, and Ivy's son celebrates his birthday with a special locker.

Kenny heads out to the mountains, keeping an eye out for cougars, while Lisa scores on a small sister locker.

Allen and Ton go head-to-head with a trash-talking auction buyer. They uncover a 19th century rifle and a mechanical bowling pinsetter from the early 1960s.

When Rick gets a chance at an iconic collection of Hard Rock photographs, can he capture a deal or will another one bite the dust?

The most sacred relic of the ancient world: The Ark of the Covenant. Could descriptions of the Ark's incredible power reveal that it was a highly advanced technological device?

How did a Frenchman living in the 16th century predict so many modern-day disasters? From 9/11 and recent tsunamis to Ebola, this special explores how one person could see into the future.

Capture The Pawn: Rick prepares for war when a rare 1589 manual for war practices and fortifying defences comes into the store.

The vast Alaskan wilderness is known for disappearances, stories of strange creatures and UFO sightings. Could this be due to an otherworldly presence?

The team invites former members of the U.S. military connected to the infamous "Tic Tac" UAP encounter, and are stunned when they stimulate very similar phenomena to appear above Skinwalker Ranch.

When Rick and Corey discover a newfound love for an old Buick Roadmaster, will they be able to rev up a deal? Later, Chum checks out a doll and volleyball signed by Tom Hanks.

Scientists have forever been involved in a quest to understand the universe. But for each answer science provides, more questions arise.

The team launches an incredible night-time drone light show experiment above the Triangle, leading to a startling sighting in the sky.

A devastated cliff-top ruin, an extraordinary tall tower, a concrete structure stranded at sea and a heavy metal monster in a field all feature.

Four bladesmiths get scrappy when they are given a thin sheet metal to forge a knife and later have to recreate a razor-sharp serrated Indian sabre.

In the traditions of native peoples across North America are stories of the Star Ancestors: powerful beings who descended to Earth in the distant past and are sometimes present even today.

Stuck in prison on life sentences, two men used engineering smarts and psychological manipulation of several prison employees to escape Dannemora Prison.

Monkey glands for immortality, hypnotized assassins, and a brain-linked cyborg couple. We investigate some of the strangest experiments on record. From two-headed dogs and testicle transplants... Prepare to be astounded and a little grossed out.

For centuries, tales of terrifying monsters have fascinated mankind. Get to know the beasts that have been portrayed in some of history's classic stories.

A devastated cliff-top ruin, an extraordinary tall tower, a concrete structure stranded at sea and a heavy metal monster in a field all feature.

Giorgio Tsoukalos explores the mystery of the Nazca Lines found in the Peruvian desert. Hundreds of gigantic lines, some in the shape of animals, geometric patterns and even an alien-like being, extend for miles over a vast section of the arid plain.