Horizon - Season 46
18 episodes
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
S12
S13
S14
S15
S16
S17
S18
S19
S20
S21
S22
S23
S24
S25
S26
S27
S28
S29
S30
S31
S32
S33
S34
S35
S36
S37
S38
S39
S40
S41
S42
S43
S44
S45
S46
S47
S48
S49
S50
S51
S52
S53
S54
S55
S56
S57
S58
S59
S60
S61
Episode 1
Why Are Thin People Not Fat?
The world is affected by an obesity epidemic, but why is it that not everyone is succumbing? Medical science has been obsessed with this subject and is coming up with some unexpected answers. As it tu
Episode 2
Cannabis: The Evil Weed?
Cannabis is the world's favourite drug, but also one of the least understood. Can cannabis cause schizophrenia? Is it addictive? Can it lead you on to harder drugs? Or is it simply a herb, an underval
Episode 3
Why Do We Dream?
Horizon uncovers the secret world of our dreams. In a series of cutting-edge experiments and personal stories, we go in search of the science behind this most enduring mystery and ask: where do dreams
Episode 4
Can We Make a Star on Earth?
Professor Brian Cox takes a global journey in search of the energy source of the future. Called nuclear fusion, it is the process that fuels the sun and every other star in the universe. Yet despite o
Episode 5
The Secret Life of Your Bodyclock
Why are you more likely to have a heart attack at eight o'clock in the morning or crash your car on the motorway at two o'clock in the afternoon? Can taking your medication at the right time of day re
Episode 6
What's the Problem with Nudity?
What is wrong with nudity? Why are people embarrassed about their bodies? How and why did they get the way they are?
Horizon takes a group of volunteers and subjects them to a series of psychological
Episode 7
How to Survive a Disaster
When disaster strikes who lives and who dies is not purely a matter of luck. In every disaster, from those people face once in a lifetime, to those they face every day, there are things that can be do
Episode 8
Who Do You Want Your Child to Be?
David Baddiel, father of two, sets out to answer one of the greatest questions a parent can ask: how best to educate your child.
Taking in the latest scientific research, David uncovers some unconven
Episode 9
Why Can't We Predict Earthquakes?
Last century, earthquakes killed over one million, and it is predicted that this century might see ten times as many deaths. Yet when an earthquake strikes, it always takes people by surprise. So why
Episode 10
Alan and Marcus Go Forth and Multiply
Ever since he was at school, actor and comedian Alan Davies has hated maths. And like many people, he is not much good at it either. But Alan has always had a sneaking suspicion that he was missing ou
Episode 11
How Violent Are You?
What makes ordinary people commit extreme acts of violence? Michael Portillo investigates the dark side of human nature, and discovers what it is like to inflict pain.
Episode 12
Do I Drink Too Much?
Do I Drink Too Much? Alcohol is by far the most widely used drug - and a dangerous one at that. So why are so many of us drinking over the recommended limits? Why does alcohol have such a powerful gri
Episode 13
The Secret You
With the help of a hammer-wielding scientist, Jennifer Aniston and a general anaesthetic, Professor Marcus du Sautoy goes in search of answers to one of science's greatest mysteries: how do we know wh
Episode 14
Fix Me
Episode 15
Who's Afraid of a Big Black Hole?
Black holes are one of the most destructive forces in the universe, capable of tearing a planet apart and swallowing an entire star. Yet scientists now believe they could hold the key to answering the
Episode 16
Why Do We Talk?
Talking is something that is unique to humans, yet it still remains a mystery. Horizon meets the scientists beginning to unlock the secrets of speech - including a father who is filming every second o
Episode 17
How Long is a Piece of String?
Alan Davies attempts to answer the proverbial question: how long is a piece of string? But what appears to be a simple task soon turns into a mind-bending voyage of discovery where nothing is as it se
Episode 18
How Many People Can Live on Planet Earth?
Naturalist Sir David Attenborough investigates whether the world faces a population crisis and if it is the duty of individuals to change the way they live.