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

Johnny Kingdom films the bird species he finds near his home. Early summer, and the next challenge is getting footage of woodpecker chicks and finding a pair of barn owls to film. 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

Ian Hislop explores the British trait of obsession with the past. He looks at the rural olden days - Britain's idealised vision of the countryside. Show more

Jeremy Paxman traces the story of the British Empire. He begins by asking how such a small country got such a big head and came to rule a quarter of the world. Show more

Psychotherapist and agony aunt Philippa Perry presents a documentary exploring the problem page's enduring appeal, picking her way through three centuries of advice. Show more

Behind the scenes at British Airways. Featuring a look at the most glamorous and profitable route in BA's long-haul network, London to New York. Show more

Dr Michael Mosley explores the bizarre and fascinating world of parasites by turning his body into a living laboratory and deliberately infesting himself with them. Show more

Documentary series. With chainsaws, adzes, and over 30 different chisels, Maori carver Logan Okiwi Shipgood crafts a 6ft tall 'pou' statue from native New Zealand timber. 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