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Investigators find a new clue about the missing Malaysia Airlines flight that disappeared in 2014, and an astronaut spots something strange in the Sahara Desert.

An ominous shadow engulfs the Pacific Ocean and scientists have trouble explaining a strange lake that's shaped like a perfect circle.

A dagger sealed in King Tut's tomb for over 3,000 years is made of a possibly extraterrestrial metal. A huge swastika is found in the desert near Roswell.

It's a cold and wet day in Banning, as Laura tries to comfort the buyers with 'hot' cocoa and umbrellas.

Ivy takes an opportunity to practise his dart game, as the buyers head to Riverside. Rene exchanges poker for a chance to get his Becker on.

Arch-enemies drop their guard to team up against a new threat. Then, it's back to the future when Desert Dan risks it all on a tyre and a hunch.

Big money brings out fierce competition at a rare high-stakes RV auction, before the contents of a locker spill out at our bidders' feet.

Brandon and Lori uncover a vintage machine filled with risque photos, before our buyers lock horns over what could be priceless artwork.

Cash flies over a locker that reveals a high-ticket mystery item, before everyone digs deep to win an ATM - but will this be a major regret.

Rick makes a surreally good deal for a painting supposedly created by Rene Magritte - will this be the biggest pay day in Pawn Stars history.

Rick and Chum rack up points testing the merch at a pinball paradise, while Corey saddles up to an obscure piece of World War II history.

You're a Good Man, Chumlee Russell: When a seller brings in a WWF figurine, Chum looks to a higher authority. Plus, Rick takes a stab at a 19th-century knife pistol.

From a dog's space voyage to Arctic survival and time travel, these journeys are extraordinary and truly unbelievable.

A robber successfully snatches Einstein's brain, while a thief steals hundreds of dollars while wearing a Santa Claus costume and more.

Some discoveries are anything but ordinary, like severed feet on a beach, or finding evidence of a tiny otherworldly creature. Each is weirder than the last.

In 1934, Hitler's government is firmly in the saddle. Most Germans support Hitler's anti-Jewish policy and the regime's terror soon escalates.

At the end of 1939, the German Army invades Poland. Examine how Hitler succeeded in pushing through his rearmament and war plans relatively unhindered.

In the shadow of the war, the Nazi regime gradually advances its "final solution to the Jewish problem.

After Pearl Harbor Japanese forces sweep through Southeast Asia. On Guadalcanal, US Marines face a brutal fight to halt their relentless advance now.

As Hitler's power spreads across Europe, his hateful ideology drives persecution of Jewish people, leading to escalating violence and ultimately the Holocaust.

Secrets of popes, rewritten laws and cities lost to the waves - these divine discoveries shake our beliefs and uncover mysteries of truly epic proportions.