Horizon Season 47 Episodes

Episode 1

The Secret Life of the Dog

A look at the increasing research into dogs that is giving scientists a greater understanding of humans and even helping to identify disease-causing genes.

Episode 2

Diet: A Horizon Guide

Looking through nearly 50 years of BBC archive, Dr Susan Jebb explores mankind's relationship with what we eat, charting the shift from malnutrition to today's obesity epidemic.

Episode 3

Why Do Viruses Kill?

In the wake of dire warnings about new flu variant H1N1, Horizon follows the researchers trying to unravel viruses' secrets to understand when and why they kill.

Episode 4

Pill Poppers

Science series. How much is really known about the medicines we take, and can they be trusted to work. Horizon investigates the most popular pills people pop.

Episode 5

Don't Grow Old

Horizon meets the scientists who are attempting to piece together why we age and more vitally for all of us, what we can do to prevent it.

Episode 6

To Infinity and Beyond

Mathematicians have discovered there are infinitely many infinities, each one infinitely bigger than the last. And if the universe goes on forever, the consequences are even more bizarre. This is the story of infinity.

Episode 7

What Makes a Genius?

Professor Marcus du Sautoy finds out if the brain of a genius is fundamentally different from that of a regular person.

Episode 8

Did Cooking Make Us Human

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.

Episode 9

Is Everything We Know About the Universe Wrong?

Investigating the discovery of what is ominously being called 'dark flow', a phenomenon which could mean scientists might have to find a new way of understanding the universe.

Episode 10

The End of God?: A Horizon Guide to Science and Religion

Thomas Dixon delves into the BBC's archive to explore the troubled relationship between religion and science, from the creationists of America to the physicists of the Large Hadron Collider.

Episode 11

Back from the Dead

Dr Kevin Fong investigates a pioneering technique of extreme cooling that is being used to bring people back from the dead. He meets the doctors who developed the procedure.

Episode 12

The Death of the Oceans?

Sir David Attenborough reveals the findings of an investigation into what is happening to our oceans, and looks at whether it is it too late to save their remarkable biodiversity.

Episode 13

What Happened Before the Big Bang?

Horizon explores a dizzying world of cosmic bounces, rips and multiple universes, and finds out what happened before the big bang.

Episode 14

Is Seeing Believing?

Horizon explores the wonderful world of illusions, revealing the tricks they play on our senses, why they fool us and the biology behind them.

Episode 15

Miracle Cure? A Decade of the Human Genome

51 mins

Completed ten years ago, the $4 billion Human Genome Project promised cures for diseases and a new world of personalized medicine. But where are we now? Is personalized medicine and gene therapy just around the corner? Horizon investigates.

Episode 16

Asteroids: The Good, the Bad, and the Ugly

Famed for their ability to inflict Armageddon from outer space, asteroids are now revealing how they are responsible for both life and death on our planet.

Episode 17

Deepwater Disaster: The Untold Story

The story of the 87-day battle to kill the Deepwater Horizon oil blowout a mile beneath the waves - a crisis that became America's worst environmental disaster.