BBC Four HD

Programmes start at 7.00pm.

With half the quarter-final places filled, two more teams of students return for a second-round match. Jeremy Paxman asks the questions.

Quiz in which connections must be made between seemingly random elements. How does Carmilla link to Neo via Lord Voldemort and Sir Leigh Teabing.

Art historian Rose Balston creates a television history of John Constable.

Andrew Graham-Dixon discovers how the ambitions of visionary artists and architects helped America remove itself from the shadow of Europe in the 20th century.

The team uncover a danger that humanity is only just waking up to - space weather. They meet the dedicated people working to keep us safe from the very worst that the sun can throw at us.

Art critic Robert Hughes looks at America's majestic landscapes, exploring how artists have contributed to the religious and patriotic connotations of nature.

Simon Sebag Montefiore looks at the Habsburgs' rise to power and how Vienna marked Europe's front line in the struggle to defend both Christendom and the Catholic church.

Dr James Fox takes a journey through six different landscapes across Britain, meeting artists whose work explores our relationship to the natural world.

Quiz in which connections must be made between seemingly random elements. How does Carmilla link to Neo via Lord Voldemort and Sir Leigh Teabing.

Andrew Graham-Dixon discovers how the ambitions of visionary artists and architects helped America remove itself from the shadow of Europe in the 20th century.

Programmes start at 7.00pm.

Programmes start at 7.00pm.

Two more teams of students return for a second-round match, with three places in the quarter-finals still up for grabs. Jeremy Paxman asks the questions.

Quiz in which connections must be made between seemingly random elements sees the battle for third place in the series.

Comedy of social manners. Hyacinth wants her neighbours to see the arrival of her new suite, boasting that it's an exact replica of one at Sandringham House.

Sitcom about an irrepressible snob. Hyacinth's plan to take Daddy on a picnic backfires when he takes the car, leaving the rest of the family stranded.

How the liberal politics and free-market economics of the British Empire unravelled, leading to the potato famine in Ireland and mutiny in India.

Muhammad Ali returns from exile to face his greatest rival, Joe Frazier. Contains scenes which some viewers may find upsetting.

Ali battles to complete his comeback after his conviction is overturned. Contains scenes which some viewers may find upsetting.

Muhammad Ali shocks the world by defeating George Foreman, winning back the heavyweight title and becoming the most famous man on earth.

After Muhammad Ali retires from boxing in 1981, he travels the world spreading his Islamic faith and becomes a symbol of peace. Contains some strong language.

The team uncover a danger that humanity is only just waking up to - space weather. They meet the dedicated people working to keep us safe from the very worst that the sun can throw at us.

Quiz in which connections must be made between seemingly random elements sees the battle for third place in the series.

Art historian Rose Balston creates a television history of John Constable.

Programmes start at 7.00pm.

Programmes start at 7.00pm.

In the penultimate match of the second round, two more teams of students face off for a place in the quarter-finals. Jeremy Paxman asks the questions.

Quiz in which connections must be made between seemingly random elements. The Cambridge Quiz Society play the Rugby Boys in the final.

Since the first star lit up the universe, they have been engines of creation. Professor Brian Cox reveals how, ultimately, stars brought life and meaning to the universe.

A Warning from History. Laurence Rees looks back on the 1997 documentary series The Nazis: A Warning from History.

Documentary series examining how Hitler came to power. By January 1933, Germany had voted for a chancellor who was openly opposed to democracy.

Ken Loach reflects on The Old Oak, his deeply moving portrait of solidarity, displacement and community in a former mining village in County Durham.

A pub landlord in a previously thriving mining community struggles to hold on to his pub. Contains very strong language and some upsetting scenes.