Katty Kay in Washington and Christian Fraser in London return to report on the events that are shaping the world.

Jeremy Paxman asks the questions in the Christmas-themed quiz for distinguished university alumni. Two teams return to compete in the first semi-final. Show more

Ray Mears looks at how the landscapes of America's five great deserts, from the Great Basin desert to Arizona's Sonoran desert, challenged the westward push of the pioneers. Show more

Archaeologists find Roman objects abandoned during a British rebellion, traces of the lost Iona monastery, and a weapons hoard belonging to a wealthy Bronze Age warrior. Show more

Comedy series about two metal-detecting friends. Andy and Lance become eco-warriors when they find their beloved oak tree is due to be felled. Andy stumbles upon treasure. Show more

Black comedy series about small-town life. It seems that Mike and Cheryl may have made a mistake in allowing Geoff to be their best man.

Documentary about one of Britain's greatest satirists, Peter Cook, with unprecedented access to his private recordings, diaries, letters, photographs and much more. Show more

A compilation of sketches from Spike Milligan's pioneering sketch shows - surreal, influential, controversial and sublime.

A further selection of sketches from the legendary Spike Milligan's irreverent sketch shows. Alternative comedy before alternative comedy.

Antonio Pappano explores the great roles and singers through the prism of the main voice types. He continues with the mezzo-soprano, often the rival or the villainess. Show more

Ray Mears looks at how the landscapes of America's five great deserts, from the Great Basin desert to Arizona's Sonoran desert, challenged the westward push of the pioneers. Show more

Archaeologists find Roman objects abandoned during a British rebellion, traces of the lost Iona monastery, and a weapons hoard belonging to a wealthy Bronze Age warrior. Show more