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Strange Weapons: Declassified files reveal bizarre military programs, from atomic tests 1500x stronger than Hiroshima to plots involving Hitler. (S1, ep 4)

Mind Games: From the CIA's decades-long pursuit of the perfect truth serum to the US Army's secret PsyOps in Vietnam. Every one a more alarming deception than the next. (S1, ep 5)

Deep cover: Undercover agents employ daring smokescreens in the service of executing a greater purpose. (S1, ep 6)

Leigh outfoxes Donnie and Dennis and wins the rights to Matt and Damo's gold rich land. Dennis installs security cameras on his lease to try and catch the dodgy gold poachers. (S1, ep 6)

Picking Giants: Follow two of the most skilled 'pickers' as they hunt down objects with historical, collectable value that have been long forgotten by their owners. (S27, ep 6)

Off the Rails: With the power in their hands, will a seller toy with Chum's emotions when he gets his hands on a trio of vintage comic strip characters?

Knockout Salvage: In Wisconsin, Mike gets access to a legendary race car driver's collection of motorbikes and memorabilia and hopes to drive away with a prized two-wheeler. (S21, ep 1)

Mistress Of The Snark: Ivy thinks he's a comedian, but the gizmo in his locker is no joke. Brandi and Jarrod make sure that what they find in their unit doesn't stay there. (S12, ep 7)

Drama In The LBC: North Long Beach doesn't really bring out the best in the buyers, though they do manage to make a charitable contribution. (S12, ep 8)

Weekend At Barry's: Kenny is feeling nostalgic in Koreatown, so he brings along an old friend - which may or may not have been a good idea. (S12, ep 9)

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. (S12, ep 10)

Unlikely Alliances: The pressure is on for both shops when Mike sells a Willys Jeep to custom car wizard James West, with the price determined by the winner of a drag race. (S3, ep 4)

Hot Wheel Of Fortune: Rick is on a roll when the world's rarest Hot Wheel car comes into the shop. Meanwhile, Chum puts pen to paper and writes his memoirs. (S16, ep 27)

Wanted: Pawn Or Alive: Rick's taste for football is wetted when a bucket hat lands at the shop. Spencer provides an Incredible Hulk comic book, capturing Corey's imagination.

Nowhere To Formaldehyde: 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. (S12, ep 11)

They Shoe Horses, Don't They?: Out in Hesperia, Mary's transportation troubles lead to teaming up with Kenny and taking him out to pasture. (S12, ep 12)

Santanas Are Coming to Town: Tempers flare when recently separated Brandi and Jarrod find themselves at the same auction. (S13, ep 1)

Bits and Pizzas: The King of Montebello can't wait to see what he can drum up this time around. Rene sniffs out a great locker, taking ruthless measures to get it. (S13, ep 2)

The Gates of Hell 1941-1942: In the shadow of the war, the Nazi regime gradually advances its "final solution to the Jewish problem", culminating in the Holocaust. (S1, ep 7)

Knights of the Grail: Professor Alice Roberts continues her Grail quest by unearthing the legendary knights entwined with Britain's sacred past. (2 of 3)

Million Mummy Necropolis & the Enigmatic Horseshoe: Join experts as they uncover global stories and answer extraordinary questions about secrets which were once concealed. (S2, ep 2)

Maree Man and the Mystery Mummies: 96 ancient mummies are unearthed in Chile, while a recently discovered tomb in Egypt leads to an astonishing discovery. (S1, ep 1)

Croc Mummies and the Lost City of Avaris: The remains of 10 ancient crocodiles are excavated on the bank of the Nile, while a four-thousand-year-old stone complex is found. (S1, ep 2)

Shimoa and the Sailing Stones: Rocks appear to magically move across a dry lakebed in America, while a major discovery is made in China's Ordos Desert. (S1, ep 3)

Motorcycle Mancave: Mike takes viewers on a pick at a three-generation family business, where the granddaughter is a treasure trove of knowledge about every item. (S21, ep 2)

Hog Wild: In the finale of the Supersized event, four smiths face a colossal challenge when they must forge giant hog splitters from 12 pounds of steel. (S9, ep 4)

Scotland: Andy McGrath embarks on a mission to answer some of Britain's craziest questions, from UFO incidents to the famous Loch Ness Monster. (S2, ep 2)

Knights of the Grail: Professor Alice Roberts continues her Grail quest by unearthing the legendary knights entwined with Britain's sacred past. (2 of 3)

Million Mummy Necropolis & the Enigmatic Horseshoe: Join experts as they uncover global stories and answer extraordinary questions about secrets which were once concealed. (S2, ep 2)

Tower of Skulls: At Mexico City's Templo Mayor, archaeologists uncover a 15th-century tower of 600 skulls, revealing new insights into Aztec sacrifice and ritual. (S1, ep 2)