TV Guide Blaze Friday

Giorgio Tsoukalos takes an in-depth look at extra-terrestrial mysteries. Here, he investigates whether the religious relic the Ark of the Covenant could hold connections to an extraterrestrial past

Items including a daguerreotype brooch, a tea caddy and a diamond and gold watch get the once over in Ilford, Greater London, before the owners decide whether to sell to the dealers or take their treasures to auction. Plus, a corset stay catches the eye of host David Dickinson

David Dickinson and the team value antiques in Worksop, Nottinghamshire. Dealer Tim Hogarth demonstrates his passion for anything Scottish when a dirk - a type of dagger - is brought to his table. Meanwhile, a clockwork train makes David Ford reminisce about his youth

Allen Haff and Ton Jones are out-contested by a glamorous duo, but a rash bid on some apparent trash leads to an unexpected outcome. Meanwhile, a punt on an ancient artifact is considered

When Les puts the kibosh on Seth's outlandish plan to boost business, father and son head to the race track to decide who's boss. Documentary series following the daily running of a pawn shop

A trip to wine country has the bidders thinking first class but acting ruthlessly. One bin stinks to high heaven, but someone smells a profit. Another bidder gets nothing but sour grapes. Brandon and Lori pray their latest score is ready for takeoff

Craig and co-host Sarah Cruddas examine the Chicago O'Hare International Airport case of November 2006 - the sighting of a flying saucer hovering over a United Airlines airport gate. The incident was witnessed by multiple aviation professionals, pilots and passengers. The immediate aftermath of the event was captured in real time by audio recordings of communication between the airport's Air Traffic Control tower and airline staff, but the sighting was dismissed by the US government's Federal Aviation Administration as a weather phenomenon. Craig and Sarah talk to UFO investigator Robert Powell, who reveals the UFO punched a circular hole in the clouds as it departed upwards after hovering over the terminal. Craig and Sarah also learn astonishing details about how aviation authorities handled the incident

In 1997, over the city of Phoenix, Arizona, one of the most spectacular mass UFO sighting of all time took place. Thousands of people witnessed a series of bright orange orbs moving in formation silently overhead. Despite hours of video and photographic evidence this case remains unexplained. Craig and space journalist Sarah Cruddas talk to eyewitness nurse David Parker who provides a vivid description of his close-up encounter with a huge boomerang-shaped UFO that passed directly overhead. They also investigate the response by the authorities in the days following the UFO event

Throughout time, people have believed mountains were the home of the divine. This edition investigates whether hilltop spirits, which some through time have believed to inhabit mountains, could have been extraterrestrials