S1.E3 ∙ Episode #1.3

From the world's longest tunnels to the world's most advanced skyscraper, Building Giants reveals the extraordinary innovations that help record-breaking superstructures to be built, and uncovers the inner secrets of how they work.

Go behind the scenes as Megafactories explores manufacturing goliaths and brings to life some of the greatest one-of-a-kind factories in the world.

With the help of one of the UK's leading geneticists, Professor Turi King, Stacey Dooley helps to answer people's burning questions about their family, health or ancestry with a visit to a DNA testing clinic.

As an energy crisis and cost of living crisis collide, this 3-part series will see the Lincolnshire lorry mechanic and motorcycle racer investigate the past, present and future of British power stations to work out how the country makes its most valuable commodity of all: electricity. The series is set to have a raft of fascinating moments including Guy making his own spectacular contribution towards Britain's 'Net Zero' goals, by helping to blow up a coal-fired power station. He'll be putting himself through an intense safety course and learning how to escape from an underwater helicopter so that he can work on the world's biggest offshore wind farm, then he'll work with the British Army in their brand new solar-powered workshop. Plus he'll be tasked with "the hardest job in the country" - manually making the second-by-second adjustments required to balance the nation's supply of electricity with its ever-changing demand. Guy will also drive to the very end of the National Grid - the Orkney Islands - and find out how the world's biggest tidal generator and a fledgling hydrogen economy are teaching the world about future fuels. Additionally, he'll investigate what part nuclear has to play in keeping the country's lights on and will put in a shift at Hinkley Point C, the nuclear building site reputed to cost £7m a day to run.

Historian Bettany Hughes retraces the lives of three great thinkers whose ideas shaped the modern world: Karl Marx, Frederick Nietzsche and Sigmund Freud.

The history of mathematics from ancient times to the present day. Narrated by Oxford mathematics professor Marcus du Sautoy, the series covers the seminal moments and people in the development of maths.