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From the Johnstown flood to the Indonesian tsunami, discover how water's power can transform into an unstoppable agent of death.

Nature: Mother Nature may be breathtaking-but she doesn't always play nice.

Age-old ruins can stand with their true history seemingly erased by time - can modern research discover why these ancient structures were built.

It's wheels up for Papa Bear when he takes a gamble on a mysterious covered item.

Does Big Bear mean Big Money? The Alvarados get sneaky while Desert Dan horses around, and frustration gets the best of Brandori.

Brandon goes out on a limb and finds himself sinking in quicksand with no help from Lori. Will Desert Dan lend him a hand.

Scott blows his wad on an Oktoberfest bin and will have to drown his sorrows. The Alvarado Brothers bid big on collectibles - will they draw a wild card.

Scott and Chrissy's last hurrah. Brandon and Lori win the big prize, but it turns out all that glitters is not gold.

Moné, Brandon and Lori's new nemesis arrives on the scene.

From the Johnstown flood to the Indonesian tsunami, discover how water's power can transform into an unstoppable agent of death.

As floodwaters swallow the bayou, Troy and Pickle struggle with drowned lines, as Bruce and Anna try to lure in migrating giants with a secret sauce.

Rick prepares for battle over a pair of vintage posters, Corey takes a look at an old fireman's megaphone and Chum heads over to a photo gallery.

A late collector's home features a stockpile of awesome wheels. Meanwhile, Danielle nails a shot-in-the-dark mission for rock'n'roll legend Jack White.

An old client has brought in Ian to build a classic 54' Chevy pickup truck from the ground up, complete with major custom upgrades.

As the season comes to a close, the Clermont Diggers unearth a monster nugget. Meanwhile, the Mineshaft Hunters face a life-or-death emergency.

Alice Roberts and Matt Williams visit the Neolithic Orkney World Heritage Site, where they explore finds from archaeological digs across the north of Britain.

Corey checks out a 1972 telegram that rejects Muhammad Ali from fighting in Alaska. A first edition copy of Oscar Wilde's The Happy Prince arrives in store.

Rick aims to get a rifle from the 1800s, a seller flexes a signed autobiography by Arnold Schwarzenegger and a ventriloquist doll makes Corey's head spin.

Kenny is feeling nostalgic in Koreatown, so he brings along an old friend - which may or may not have been a good idea.

The Jenny, The Baker, The Prosthetics Maker: It's Brandi's birthday, so naturally Jarrod brings her to an auction in Menifee. Meanwhile, Darrell hunts another 'All Ten' locker.

Back in Hawaiian Gardens, Emily's husband Cody misses a bid and stirs up trouble, while Ivy revisits some of his glory days... in a way.

Out in Hesperia, Mary's transportation troubles lead to teaming up with Kenny and taking him out to pasture.

Alice Roberts and Matt Williams visit sites in the west of Britain, including one uncovering the rituals of Stonehenge.

Throughout history, key moments in the evolution of religious belief and moral law have revealed uncanny parallels to accounts of extraterrestrial contact.

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.

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

Robbie and Jersey comb through a homewrecker's massive cache of architectural salvage, while Mike is determined to rescue a trio of dented Porsches.

The bladesmiths hope to recreate the famous battle sword wielded by Napoleon. Plus, they turn a ladder into a set of Damascus knives.

Learn how Lawrence of Arabia used guerilla warfare against the Ottoman Empire's railways. Also, what secrets lie under New York's Grand Central Station.

Discover the many lovers of Adolf Hitler - uncovering the unfortunate demise of all who dared resist his love, affection and sexual appetite.

Throughout history, key moments in the evolution of religious belief and moral law have revealed uncanny parallels to accounts of extraterrestrial contact.