As President Trump takes office, Katty Kay in Washington and Christian Fraser in London report on the events that are shaping our world.

The series exploring strange animal behaviour looks at how they use drugs and alcohol, from starlings that perform aromatherapy to monkeys with a liking for happy hour. Show more

Series exploring scientific issues. This episode follows the cosmologists who are creating the most ambitious map in history - a map of everything in existence. Show more

Michael Mosley investigates Porton Down, Britain's most secretive and controversial military research base. He comes face to face with chemical and biological weapons old and new. Show more

Jim Al-Khalili uncovers the story of Sellafield. He encounters some of the most dangerous substances on earth, reveals the nature of radiation and even attempts to split the atom. Show more

Passionate Darwinian David Attenborough, who sees evolution as the cornerstone of his television career, shares his personal views on Darwin's controversial idea. Show more

A look back at the bank holiday 'battles of the beaches', when hundreds of mods and rockers flocked to seaside resorts on scooters and motorbikes in search of thrills and spills. Show more

Comedian and history buff Al Murray is joined by Dan Snow, Natalie Haynes and Matthew Sweet for a fresh look at a subject very close to his heart - the great British war movie. Show more

Dr Michael Scott explores how the Romans absorbed Greek theatre and how their empire provides a crucial connection between modern drama and the plays of the ancient Greeks. Show more

Documentary which explores the British love of fast, daring and sometimes reckless motorbike riding during a period when home-grown machines were the envy of the world. Show more