BBC Four HD

Programmes start at 7.00pm.

Explorer Paul Rose's Yorkshire Dales adventure concludes in Wharfedale. He meets the Calendar Girls and finds out why bats are threatened in the Dales.

Robbie navigates the mighty River Severn and takes an unexpected bath.

Scientists uncover the secrets of the Mandrin Cave in France, where the remains of a Neanderthal were found in 2015. Contains some scenes which some viewers may find upsetting.

Documentary which follows the construction of a trailblazing 36,000-tonne steel structure to entomb the ruins of the nuclear power plant destroyed in the 1986 Chernobyl disaster.

Patrica Hayes stars as Edna, an alcoholic homeless woman in search of shelter. Contains some scenes which some viewers may find upsetting.

Stephen Smith finds out what it took to get ahead at the court of Richard II.

Scientists uncover the secrets of the Mandrin Cave in France, where the remains of a Neanderthal were found in 2015. Contains some scenes which some viewers may find upsetting.

First transmitted in 2001, this programme chronicles the construction of the Empire State Building in New York, which was the world's tallest skyscraper when opened in 1931.

Documentary which follows the construction of a trailblazing 36,000-tonne steel structure to entomb the ruins of the nuclear power plant destroyed in the 1986 Chernobyl disaster.

Programmes start at 7.00pm.

Programmes start at 7.00pm.

Ben Robinson unlocks the ancient roots of the Northumberland village of Warkworth, discovering clues that point back almost 1,000 years to the Norman conquest.

Robbie crosses an aqueduct and gets stuck in a lock.

Returning to England from Istanbul on the Orient Express, Hercule Poirot is asked to investigate a murder.

A retrospective look at television appearances made over the years by award-winning actor Albert Finney, with archive interviews and classic clips. Narrated by Sylvia Syms.

Adaptation of Oscar Wilde's masterpiece, set in 1890s England. A comedy of mistaken identity ensues when two gentlemen friends use the same alias to pursue the women they love.