U and Eden+1

Documentary series. Gregg Wallace visits Britain's largest bicycle factory - which produces 150 folding bikes every day - and joins a production line to make his own bike.

Sir David Attenborough shines the spotlight on an array of animals that baffle and fascinate. We learn about how naturalists found out some eels were electric.

Shopping from Home.

Exploring Schindler's Ark in the Czech Republic, a secret refuge in Europe's killing fields, and a lost Amazonian paradise deep in the Brazilian rainforest.

Exploring decaying remains of Old Essex County Jail in New Jersey, a facility that became a powder keg of injustice that was set to explode.

Hunt for the Nazi Gold Train: Exploring the Polish city of Walbrzych, where a fairy-tale castle on a cliff conceals a vast subterranean tunnel network linked to a legend of lost Nazi gold.

Exploring Fort Sherman, a jungle stronghold in Panama built to defend a prized American possession that soon faced the threat of an elaborate Nazi conspiracy.

The programme looks at a mysterious group of rusting ships stranded in an arid desert, and a monstrous defensive line on the snow-covered peaks of the Italian Alps.

An abandoned prison beneath the water, a tunnel in the heart of a mountain, concrete towers hidden in the woods and a rusting coastal relic.

Exploring Schindler's Ark in the Czech Republic, a secret refuge in Europe's killing fields, and a lost Amazonian paradise deep in the Brazilian rainforest.

Exploring decaying remains of Old Essex County Jail in New Jersey, a facility that became a powder keg of injustice that was set to explode.

Hunt for the Nazi Gold Train: Exploring the Polish city of Walbrzych, where a fairy-tale castle on a cliff conceals a vast subterranean tunnel network linked to a legend of lost Nazi gold.

Exploring Fort Sherman, a jungle stronghold in Panama built to defend a prized American possession that soon faced the threat of an elaborate Nazi conspiracy.

The programme looks at a mysterious group of rusting ships stranded in an arid desert, and a monstrous defensive line on the snow-covered peaks of the Italian Alps.

An abandoned prison beneath the water, a tunnel in the heart of a mountain, concrete towers hidden in the woods and a rusting coastal relic.

A ruined compound on the edge of a peninsula in Colombia which was once home to a famous outlaw and the strange towers looming over red-tinted waters in a Portuguese landscape.

A formerly luxurious and strategic mountain-top villa on the island of Rhodes in the Mediterranean that's been ravaged by acts of revenge by locals since 1955.