TV Guide Blaze Wednesday

More than 3,000 years ago, the ancient Greeks credited their most monumental achievements to gods like Zeus, Apollo and Poseidon. This programme considers whether it is possible that these powerful beings from Mount Olympus were, in fact, extraterrestrial visitors to Earth

In Wyoming, Josh Kirk fends off dangerous bulls to protect a bison mother as she struggles through a difficult birth. In Alaska, Mike Horstman embarks on a journey to the south end of Kodiak Island to hunt for the largest bears on Earth

David Dickinson and the antique dealers David Tupman, Karen Dalmeny, Brenda Haller and David Ford head to Oswestry. Here a gold Rolex watch, a set of Indian terracotta figurines and a some cut-throat razors are among the items brought in to be valued by members of the public, who then decide whether to put their treasures up for auction or accept a cash sum

David Dickinson and the team value antiques in Bradford, West Yorkshire. Jo Brayshaw becomes besotted with some guinea scales, while Tim Hogarth roots around a jewellery box. Plus, David Hakeney decides whether to bid on a glamorous glass epergne or let it be sold at auction

The fast-paced world of shipping port auctions, where bidders need nerves of steel to beat their rivals. A new team surfaces and poses a threat to Mo. A three-wheeled item entices Matthew and a cluster of table-tennis balls causes confusion

Reality documentary following the fast-paced world of shipping port auctions. Buyers clash over outdoor barbecues and a portable rave unit. Mo and Ty take a big gamble on a speedy prize

Jake Herak and his hounds let loose on a black bear that leads them up a gruelling course of falling rock and treacherous terrain, while Mike Horstman makes a life-threatening climb up and down the cliffs of Kodiak Island leading to a battle with a brown bear

Giorgio Tsoukalos from Ancient Aliens investigates whether extra-terrestrial beings lie at the heart of some of Earth's most famous mysteries. Alongside experts, he explores the puzzling construction of Puma Punku in Bolivia, contemplating whether advanced technology could have been used to carve the ancient temple complex

Drones explore strange geological occurrences, unique man-made structures, curious creatures and lost civilizations. This episode focuses on mysteries found in desert landscapes, featuring a constant inferno in Turkmenistan, mysterious circles in the Namibian desert and secret electric blue ponds in Utah

Experts contemplate whether an advanced civilisation of giants built Malta's mysterious megaliths, with the native people having only limited involvement. Presented by Giorgio Tsoukalos

Jake Herak and his hounds let loose on a black bear that leads them up a gruelling course of falling rock and treacherous terrain, while Mike Horstman makes a life-threatening climb up and down the cliffs of Kodiak Island leading to a battle with a brown bear