U&Yesterday HD Wednesday

A chance to buy goods from the comfort of home

Exploring the vast 400-mile Mammoth Cave in Kentucky, USA. Plus, a newly constructed opening into a metal mine in Wales - untouched for over 70 years

Exploring hidden defences that have kept Cork Harbour, in Ireland, safe for over 400 years. Plus, a former submarine base in the fjords of northern Norway

The world's most impressive disused railway bridges, including the biggest wooden trestle bridge in the world, which was closed down due to hurricane damage

Exploring ship graveyards, including Scapa Flow in Orkney, where German warships were scuttled after the First World War, and Mallows Bay, home to 200 wrecks colonised by wildlife

The story of the GM Opel Blitz and the American-owned war factories that would produce them, putting business before country

Account of Operation Barbarossa, Germany's plan to invade the Soviet Union in 1941, revealing the massive human and financial cost endured by the Soviet people

Robbie Cumming journeys through Royal Leamington Spa and the historic town of Warwick with its medieval castle.

The experts visit Towneley Hall near Burnley in Lancashire, where items include a curious collection of handbags and a centuries-old ring bought at a car-boot sale

Derek's search for the unusual lands him a 1947 Lea Francis that's half made of wood. Paul heads for the countryside to pick up a Morris one tonne truck

Dave and Jack head to East Yorkshire to pick up a dusty Alfa Romeo and a 1930s Jowett. But Dave's more taken with a Carry On-style, bum-wobbling exercise machine

Hiram Maxim developed the world's first fully automatic machine gun, but it weighed a whopping 136lbs - until British company Vickers adapted the design

Bomber Command is unable to hit its targets precisely and attacks German cities under cover of darkness, while the Blitz in Britain brings public demand for revenge strikes

The experts visit Towneley Hall near Burnley in Lancashire, where items include a curious collection of handbags and a centuries-old ring bought at a car-boot sale

Robbie Cumming journeys through Royal Leamington Spa and the historic town of Warwick with its medieval castle.

It's Robbie Cumming's toughest trip yet as he battles through water weed on the Bradley Arm and gets stuck in silt on the Ridgacre Branch

The story of Royal Navy aircraft carrier HMS Queen Elizabeth's first operational mission, following it on a gruelling seven-month voyage to the South China Sea

Derek's search for the unusual lands him a 1947 Lea Francis that's half made of wood. Paul heads for the countryside to pick up a Morris one tonne truck

The world's most impressive disused railway bridges, including the biggest wooden trestle bridge in the world, which was closed down due to hurricane damage

Michael Portillo begins a journey across Alaska, discovering its links with Russia, feeding a sea otter pup and joining the US Arctic Warriors for parachute training

Gary Wallis clears a barn full of old treasures. His buys include a weathervane and the wooden sides of a horse-drawn cart, which undergo an amazing reinvention

Michael Portillo travels from Newcastle to Lindisfarne, where he explores the lime kilns and finds out how Christianity spread from there across northern England in the 7th century

A chance to buy goods from the comfort of home

Exploring long narrow tunnels beneath Exeter that were built in medieval times to protect the city. Plus, a marble quarry under the pine forests of Vermont