BBC Four HD Saturday

Dr Janina Ramirez examines the discovery of a 40,000-year-old artwork known as The Lion Man, found by Nazi party member and archaeologist Robert Wetzel in 1939

Paul Rose investigates Norwegian explorer Fridtjof Nansen's expedition to reach the North Pole in 1893, which resulted in the development of new exploration techniques

Series based on the real events of an almost 30 year failure of police to identify a serial rapist, whose victims spanned across decades. In French

Irene Dereux, a young investigating judge, realises that a case she has been assigned has striking similarities with others. In French

The king of chat speaks to snooker icon Ray Reardon, Swedish actress and model Britt Ekland and actor Edward Fox. First broadcast 13 January 1979

Hyacinth attends the christening of Daisy's granddaughter, and is upset to learn the child's mother is not married. Comedy, starring Patricia Routledge

Ria receives bad news when she meets up with Leonard after a mysterious phone call. First broadcast 10 December 1979

Paul Rose investigates Norwegian explorer Fridtjof Nansen's expedition to reach the North Pole in 1893, which resulted in the development of new exploration techniques

Sam Neill narrates a documentary examining the wildlife of the Antipodean island chain, which has been left to its own devices for 80 million years