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Explore Melbourne's long history of UFO sightings and hear incredible first-hand accounts from Victoria's locals of otherworldly encounters.

Rob and Shelley Hartland believe they live under a "UFO super highway". Meanwhile, Peter Khoury claims he experienced a close encounter - of the sexual kind.

Visit Australia's vast expanses, where farmers have been finding mutilated cattle. Plus, meet Phil Tindale who believes he witnessed two UFOs in combat.

Delve into one of humanity's oldest questions. Explore various theories and historical accounts that suggest humans may not be alone after all.

A customer comes in with a rare HG Wells book and an enormous asking price, while a horse statue made of turquoise moseys on in.

The Wolfe brothers explore Larry Land - a huge hangar filled with carnival relics. In Kansas, Mike has filled the house next door with lots of treasure.

Delve into one of humanity's oldest questions. Explore various theories and historical accounts that suggest humans may not be alone after all.

Lauro hunts caribou in Alaskan whiteouts while Bret and Ivy set a 230-mile trapline under snow.

Marty battles the Alaskan wilderness while running his trapline as Mike reclaims solar panels for his Kodiak homestead.

As the team makes a potentially key discovery beneath a boulder on Lot 8, new clues arise that could identify who was behind the Oak Island mystery.

Lets Give Em Something To Tonka About: It's a long way to Murietta, and Dave is counting on his competition being unwilling to buy a big locker they need to move.

The buyers head to Torrance, where Dave sees his profits grow - amongst other things. Mary finds clothes that don't fit her, which turns out to be a good thing.

The Chicken Or The Auction?: Overwhelmed by the sheer number of units up for auction in Rialto, Mary and Ivy wager that each can better predict locker prices.

Emily brings her mother along with her to Walnut, and Darrell wastes no time finding an advantage. Ivy and Ivy jr clean up with their locker.

30mph winds batter Desert Hot Springs, and the buyers do their best to keep standing. Rene and Gunther dust off an old locker.

Not All That Glitters Is Gourd: Back in the city of Orange, the Vegas Ladies arrive in vintage style - though not everyone agrees.

In the Shadow of the Tor: Professor Alice Roberts begins her quest on Britain's windswept south coast, investigating the biblical legend of Joseph of Arimathea. (1 of.

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

Alice explores one of the most tantalising threads in Grail lore: the claim that the Knights Templar buried the Holy Grail beneath Rosslyn Chapel. (3 of.

Britain's real-life X-Files explore four otherworldly tales where fear, folklore and secrecy collide.

Welsh Cliff Castle: Rick visits Gwrych Castle, where restoration has been a lifelong passion for Mark Baker, who set up a trust to save the castle aged 12.

Lacking in speed and might, the SS Andrea Doria more than made up for it in beauty, but on the night of 25 July 1956 - the Italian liner met a disastrous fate. (3 of.

An ocean liner that saw it all, including World War II, SS Rex was a one-of-a-kind Italian ship but was ultimately left abandoned. Discover why here. (4 of.

This episode delves into the truth behind the rumours of Hitler's sex life, including whispers of homosexuality, voyeurism and sadomasochism. (1 of.

Hitler held many secrets he went through great lengths to hide throughout his life. This episode reveals the truth about his drug addiction and genital deformity. (2 of.

The Ugandan military dictator, whose brutal eight-year rule left hundreds of thousands dead, led an equally sadistic sexual life.

Thousands of UFO sightings and abductions are reported every year. This series examines these accounts and casts new light on historic cases.

Thousands of UFO sightings and abductions are reported every year. This series examines these accounts and casts new light on historic cases.

Thousands of UFO sightings and abductions are reported every year. This series examines these accounts and casts new light on historic cases.

In the Shadow of the Tor: Professor Alice Roberts begins her quest on Britain's windswept south coast, investigating the biblical legend of Joseph of Arimathea. (1 of.

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

Alice explores one of the most tantalising threads in Grail lore: the claim that the Knights Templar buried the Holy Grail beneath Rosslyn Chapel. (3 of.

Britain's real-life X-Files explore four otherworldly tales where fear, folklore and secrecy collide.

Welsh Cliff Castle: Rick visits Gwrych Castle, where restoration has been a lifelong passion for Mark Baker, who set up a trust to save the castle aged 12.

Lets Give Em Something To Tonka About: It's a long way to Murietta, and Dave is counting on his competition being unwilling to buy a big locker they need to move.

The buyers head to Torrance, where Dave sees his profits grow - amongst other things. Mary finds clothes that don't fit her, which turns out to be a good thing.

The Chicken Or The Auction?: Overwhelmed by the sheer number of units up for auction in Rialto, Mary and Ivy wager that each can better predict locker prices.

Emily brings her mother along with her to Walnut, and Darrell wastes no time finding an advantage. Ivy and Ivy jr clean up with their locker.

30mph winds batter Desert Hot Springs, and the buyers do their best to keep standing. Rene and Gunther dust off an old locker.

Not All That Glitters Is Gourd: Back in the city of Orange, the Vegas Ladies arrive in vintage style - though not everyone agrees.

A Guns N' Roses-mad collector box rocks into the shop. Will Corey end up in Paradise City or out in the cold November rain.

Rick and Chum kick it with a rare pair of Pumas from 1968. Plus, the gang are stunned by some of Marie Curie's lab notes and a Post Malone guitar.

Chum chases a lead on a 1963 Fiat Microcar. Meanwhile, Rick and Corey make a wager on a set of billiard balls and Rick examines the holy grail of coins.

Manic Matt finds himself laughing hard when the others spend big money on what looks like junk. But will he wind up the butt of the joke.

Always up for an outrageous gamble, Uzi and Schlomi throw down the gauntlet in the biggest auction yet.

The biggest auction on the planet explodes when a mysterious container from the Far East makes landfall in Los Angeles.

Mo and Ty, AKA 'Team Muscle', make their move and go on the attack.

Experts and scientists expose more dark secrets, forgotten treasures, and lost relics from some of the coldest places on Earth.

Experts and scientists expose more dark secrets, forgotten treasures, and lost relics from some of the coldest places on Earth.

Experts and scientists expose more dark secrets, forgotten treasures, and lost relics from some of the coldest places on Earth.

Explore the stories of six formidable rulers, revealing their dark legacies and the impact they've had on history.

Uncover haunting factors and new evidence, possibly leading to fresh verdicts for these enigmatic men.

A study of the life and career of Mexican drug-cartel kingpin Joaquin "El Chapo" Guzman.

From mad rulers like Caligula and Ivan the Terrible, to dictators like Mao Zedong and Saddam Hussein who killed by the millions, these are history's deadliest tyrants.