The History Channel HD

A seller walks into the shop hoping to score with his Magic Johnson 50th birthday invitation. Is the deal a slam dunk? Chum takes a look at joker cards used as props in 'The Dark Knight'.

Two smiths head back to their home forges to recreate an iconic ancient iron weapon: the Celtic Anthropomorphic Sword.

With new weather patterns looming, the days are numbered for those counting on foraging to pull them through. A survivalist is left confused as the Arctic takes back its gift.

Ronnie and Ashley follow an underwater pipeline looking for big gators, and find a gas leak that puts their lives in danger.

In Brazil, three men escape a close encounter, only to find it lasted longer than any of them realised. Plus, in Canada, a boy investigates a strange object.

In Michigan, a father and son see strange lights and call the sheriff's office. In France, a bizarre phenomenon called 'Angel Hair' is spotted hovering over school grounds.

It's not the other buyers but rather a small animal that catches Lisa off guard, though she does snag a new type of prize.

Giorgio Tsoukalos takes a look back at the most extraordinary encounters that, as far as he's concerned, provide evidence of an extraterrestrial presence on Earth.

Rick tackles a football helmet signed by 28 Heisman Trophy winners - but can he manage to get the seller's price a touch down?

Kenny tries to bribe the competition in Canyon Country and becomes more worldly as a result. Ivy and Isaiah make the most of their purchase, while Brandi takes on the powers of darkness.

This time in Montebello, Rene goes head-to-head with Darrell, buying the sister unit to see if he can finally unseat the King.

Storage unit auctions are the newest and biggest untapped source for hidden treasures, and opportunistic individuals bid on unclaimed properties hoping to strike gold.

Ivy confuses profit with prophet, but still manages to climb his way to success. Kenny tries to honour the history of San Bernardino, recording a win along the way.

Farmer Edwin Fuhr is harvesting crops when he spots a stainless steel metal object hovering in his field. Suddenly, four identical objects appear, but could aliens be to blame?

Henry Baker is driving home with his family when his wife spots lights hovering over Lake Erie. Plus, strange lights turn violent on a ranch in Argentina.

Laura Sinclair is walking her dog when she sees a large cylindrical object hovering in the sky. Plus, school children in Florida witness multiple UFO sightings.

In Ohio, two officers spot a strange bright light flying in the night sky. Police dispatch advises them to pursue the object, triggering a massive car chase.

A wave of sightings in Colares, Brazil, causes mass panic with people fleeing the island. In Australia, a flying object causes a severe headache for a farmer.