The Demonic Ape

Season 41 - Episode 1

In a film that is in turns charming, disturbing and poignant, Horizon explores the relationship between science and the chimpanzee. It bega...

The Moscow Theatre Siege

Season 41 - Episode 2

With the help of doctors and scientists in America, Germany and Britain, Horizon unpicks the mystery of the Moscow theatre siege. In Octobe...

The Atkins Diet

Season 41 - Episode 3

This is the truth about the world's most famous, most glamorous and most controversial diet. The Atkins diet says that eating fat can make y...

Secrets of the Star Disc

Season 41 - Episode 4

This is the extraordinary story of how a small metal disc is rewriting the epic saga of how civilisation first came to Europe, 3600 years ag...

The Dark Secret of Hendrik Schön

Season 41 - Episode 5

Imagine a world where disease could be eradicated by an injection of tiny robots the size of molecules. That is the hope offered by nanotech...

Thalidomide - A Second Chance?

Season 41 - Episode 6

Thalidomide was one of the biggest medical tragedies of modern times. The images of children born with shrunken limbs still haunt anyone who...

Diamond Labs

Season 41 - Episode 7

Top quality diamonds at knock down prices? The only catch is: these rocks don't come out of the ground, but are made in a lab. This is the p...

T-Rex - Warrior or Wimp?

Season 41 - Episode 8

Tyrannosaurus rex - it's the scariest, meanest, most bewitching dinosaur of them all. Children are captivated by the sheer savagery of the t...

Project Poltergeist

Season 41 - Episode 9

This is the story of two genuine scientific heroes. For forty years, John Bahcall and Ray Davis were engaged in a single extraordinary exper...

The Truth of Troy

Season 41 - Episode 10

It's one of the greatest stories ever told. The legend of Helen of Troy has enchanted audiences for the last three thousand years. In May th...

The Truth About Vitamins

Season 41 - Episode 11

Every year we spend £300 million on vitamin supplements, but do they actually do us any good? Some believe they offer the promise of prevent...

King Solomon's Tablet of Stone

Season 41 - Episode 12

Derek Tastes of Earwax

Season 41 - Episode 13

Is Wednesday red? Take part in our experiment to test whether your senses overlap. Do melodies have a colour? Take part in our experiment t...

What Really Killed the Dinosaurs?

Season 41 - Episode 14

Until recently most scientists thought they knew what killed off the dinosaurs. A 10km-wide meteorite had smashed into the Yucatan peninsula...

Making Millions the Easy Way

Season 41 - Episode 15

In the mid-1990s, a team of American science students took on the might of the Las Vegas casinos, and came home with millions of dollars. Ha...

Saturn - Lord of the Rings

Season 41 - Episode 16

In 1610, Galileo used a new invention -- a simple telescope -- to look at Saturn. When he viewed the planet for the first time, he saw somet...

The Hunt for the Supertwister

Season 41 - Episode 17

Dr Money and the Boy with No Penis

Season 41 - Episode 18