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A vast majority of reported UFO sightings all take place in the same locations on Earth - are extraterrestrial spacecrafts visiting the planet at UFO hotspots.

Throughout the world, structures exist that would be almost impossible to duplicate today. How were ancient civilisations able to build them? And why.

Mike visits a time-capsule drugstore in Indiana, while Robbie and Jersey comb through a five-generation farmstead in West Virginia.

Lisa, Scooter and company driver Muskie Todd team up as a three-truck convoy to take on the notorious Asheweig Road.

Rick, Corey and Chum rise from the ashes and start anew in Phoenix, checking out vintage Americana items, boxing memorabilia and mid-century modern furniture.

Pawn Shop Rock: A blade rumoured to belong to a Japanese WWII admiral attracts Rick's attention.

The tomb of Qin Shi Huang, the first emperor of China, remains one of the most famous and secretive archaeological sites in the world.

In China, a burial site reveals a child's remains marked with peculiar modifications. This raises questions about Chinese mortuary practices and more.

The buyers lose their minds as Kenny hunts for cougars, but finds a portable pulpit instead. Ivy shows the ladies how to dress for success.

Nice Guy: Justin's congeniality earns him Rene's goodwill and a chance to level up. Darrell's tubular locker tests out OK.

Kenny bids on a massive locker, Rene and Casey attempt to go small, and Shana and Edwina's mystery box is mislabelled.

Darrell breaks in the new guy, Brandi and Jarrod detect something mysterious in their unit, and Justin digs through a decent locker.

Rick, Corey and Chum journey to St Paul, where they unearth a fossil collection. Plus, Chum offers his two cents on an ancient coin collection.

A signed Red Hot Chili Peppers album and a Mobo Bronco toy are brought into the shop. But how much are they worth.

Chum gets his hands on a one-of-a-kind chair with a strange feature. Meanwhile, Corey pedals into the past with a toy inspired by the Weinermobile.

The buyers face ten vaults belonging to the same owner. Ivy draws a nice profit, and Mary and Kenny do all of the heavy lifting.

Dave learns that making a profit is sometimes like pulling teeth. Mary grinds to get into the black, and Ivy's locker ends up sucking and blowing.

Shana and Edwina bring their "Golden Girls" chic to Riverside, but end up phoning it in. A messy unit catches Dave's attention.

Mary dabbles with Dave's dark arts. Brandi and Jarrod quit horsing around long enough to stumble across a wartime oddity.

Explore some of the most cavernous places on the planet, including a mysterious Siberian crater and Greenland's bizarre black holes.

A team of experts investigate some of the most well-known UFO cases of the last 75 years, hoping to uncover the truth.

A team of experts investigate some of the most well-known UFO cases of the last 75 years, hoping to uncover the truth.

Ian helps his friend Tom build the family cruiser he's been wanting. What appears to be a clean, vintage Ford barn find ends up being a lot more work.

Ian builds a Volkswagen Dune Buggy from spare parts found around his home as a wedding present for his wife.

Ian Roussel starts work on an old unfinished Led Sled project with the inspirational help from Victor Cacho.

Mike and Jersey trip out over an Oddfellow's lodge in Maryland, visiting one man's combination theme park, art installation and roadside attraction.

Four US Navy officers work to forge a naval Mark 3 dive knife using metal from an anchor chain. The remaining two recreate the intricate naval officer's sword. (4 of.

Superfortress: The story of the prolonged development and the initially troubled operational history of the Boeing B29 Superfortress. (4 of.

A deep dive into Mengele's youth, tracing how medicine and Nazism turned an aspiring dentist into Auschwitz's Angel of Death.

Unveiling the Angel of Death: An investigation reconstructs Mengele's experiments at Auschwitz, revealing his connections with other criminal doctors at Auschwitz.

34 Years in a Rat's Life: An overview of Josef Mengele's life, from his youth and studies to his Nazi practices and inhumane experiments at Auschwitz.

Hypnotherapist Adrian Finkelstein and his patient claim that they are Paul Bern and his wife, actress Jean Harlow, reincarnated.

Mike and Jersey trip out over an Oddfellow's lodge in Maryland, visiting one man's combination theme park, art installation and roadside attraction.

As the finals creep closer and the competition heats up, it's now the Marines' time to shine, as they step up to forge an iconic combat knife: the KA-BAR. (3 of.

Rick, Corey and Chum journey to St Paul, where they unearth a fossil collection. Plus, Chum offers his two cents on an ancient coin collection.

Chum gets his hands on a one-of-a-kind chair with a strange feature. Meanwhile, Corey pedals into the past with a toy inspired by the Weinermobile.

Archaeologists identify a site containing unknown structures. A lake full of jellyfish is studied and Argentinian researchers make a discovery.

Archaeologists find an ancient structure built on granite columns, puzzling stone spheres are found in Costa Rica and Mexican skeletal remains emerge.

The teams are racing against the clock to catch the most gators. The pressure is on and the competition pushes both teams to their limits.

Jacob and Little Willie face a frustrating day as they discover multiple poached lines, forcing them to set up a hidden camera to catch the culprit.

Ian helps his friend Tom build the family cruiser he's been wanting. What appears to be a clean, vintage Ford barn find ends up being a lot more work.

Ian builds a Volkswagen Dune Buggy from spare parts found around his home as a wedding present for his wife.

As the team drills deeper than ever into the money pit area, a find in the swamp could have significant implications.

The buyers head to Arcadia, where Darrell gives and takes, Ivy's prospects soar, and Rene and Casey find a his & hers locker.

The Sign of the Profit: Not even the "cupped hands" of San Bernardino can save Mary's fortune, but Ivy scraps together a bit of coin, while Kenny finds all the magic.

The girls have a newlywed-themed surprise for Emily. Rene reels in a huge locker, while Darrell tests his bicycle knowledge - and wins.

The oldest facility in Los Angeles is where the newest buyers make their debut. Brandi and Jarrod try to piece their way to a win.

Out of the Frying Pan Am: The buyers hit Dan's home town, and the Vegas Ladies' locker really takes off. Kenny's purchase sets his wallet alight.

It's the hottest day ever in Riverside and Kenny starts seeing things, while Shana and Edwina stumble across their own paradise.

An awe-inspiring year of archaeological digs with Dr Alice Roberts. Roman finds include an amazing coin hoard and a man buried on a pile of dead animals.

Humans are found to have lived in Britain earlier than thought when tools are unearthed in Norfolk, while some of our ancestors' customs are revealed at another dig.

In Northumbria, skeletons tell tales of violent death and tenderness, and people curate grave goods in an amazing community project.

Rob Bell visits Bosworth Field, the site of the decisive battle in 1485 that ended the Wars of the Roses and ushered in the Tudor dynasty.

Mine Manager, Dan, turns his attention to building a new wash plant to super-size the mine. He wants to generate $70,000 in gold revenue per week.

Passengers are searched for illegal objects when entering and leaving the United States by the Department of Homeland Security's Customs and Border Protection officers.

Passengers are searched for illegal objects when entering and leaving the United States by the Department of Homeland Security's Customs and Border Protection officers.

Agents must abort a mission when a tropical storm rolls in. A cruise ship passenger balks at paying US duty on cigarettes.

Agents conducting a stop-search of vehicles coming off a car ferry get a hit, they come across a shipment of t-shirts that may all be counterfeit.

A serial killer finds refuge in the Hells Angels, but when the club decides to kill several of their own, a failed assassination attempt results in betrayal.