Professor Diarmaid MacCulloch argues that rather than being a thug, Thomas Cromwell was a principled and pioneering statesman who laid the foundations for the modern British state. Show more

Documentary on the history of the laboratory mouse and its role in important medical breakthroughs of the 20th century, from the development of penicillin to transplant surgery. Show more

Iain Stewart tours the Pacific rim to discover how the rocks beneath our feet have shaped human history. He visits the world's most awesome volcanoes in Indonesia. Show more

Dr Alice Roberts discovers how humans left Africa to colonise the world. In Asia, she investigates how early hunter-gatherers survived in the Arctic region of northern Siberia. Show more

Professor Iain Stewart explores man's relationship with fire. Along the way he dives in a mysterious lake in Oregon, climbs a glacier of salt and takes a bath in crude oil. Show more

Horizon examines the evidence that our ancestors' changing diet and mastery of fire prompted anatomical and neurological changes that took us out of the trees and into the kitchen. Show more

Professor Robert Bartlett explores the impact of the Normans on southern Europe and the Middle East, as they spread south in the 11th century. Show more

Kate Humble and Dr Helen Czerski follow the Earth's voyage around the sun for one complete orbit, this time travelling from January to the March equinox. Show more

How modern Britain is still defined by the battle between Cavaliers (panache, pleasure and individuality) and Roundheads (modesty, discipline, equality, and state intervention). Show more

In this version made for schools, Professor Jeremy Black examines one of the most extraordinary periods in British history, the Industrial Revolution. Show more

Once hoped to be the most spectacular comet in a generation, Horizon examines the insights Comet ISON might bring to some of science's greatest mysteries. Show more

Professor Diarmaid MacCulloch explains how the church took control of marriage in the 11th century and how the Protestant Reformation launched a sexual revolution. Show more

Diarmaid MacCulloch explores how the offical Christian Church and Western society have moved apart on issues of sex and gender over the last 300 years. Show more

Horizon investigates a new era of Alzheimer's research. New scanning and gene technology is allowing scientists to identify the disease at its earliest stages. Show more

Professor Jeremy Black explains the unique economic, social and political factors that helped Britain transform itself almost entirely by the 19th century. Show more